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Pesticide Use and Water Quality: Are the Laws
Complementary or in Conflict?
Claudia Copeland
Specialist in Resources and Environmental Policy
June 16, 2009
Congressional Research Service
7-5700
www.crs.gov
RL32884
CRS Report for Congress
P
repared for Members and Committees of Congress
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Pesticide Use and Water Quality: Are the Laws Complementary or in Conflict?
Summary
This report provides background on the emerging conflict over interpretation and implementation
of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and the Clean Water Act
(CWA). For the more than 30 years since they were enacted, there has been little apparent conflict
between them. But their relationship has recently been challenged in several arenas, including the
federal courts and regulatory proceedings of the Environmental Protection Agency (EPA). In this
report, a brief discussion of the two laws is followed by a review of the major litigation of
interest. EPA’s efforts to clarify its policy in this area, including a regulation issued in November
2006, are discussed, as well as possible options for EPA and Congress to address the issues
further.
FIFRA governs the labeling, distribution, sale, and use of pesticides, including insecticides and
herbicides. Its objective is to protect human health and the environment from unreasonable
adverse effects of pesticides. It establishes a nationally uniform labeling system requiring the
registration of all pesticides sold in the United States, and requiring users to comply with the
national label. The CWA creates a comprehensive regulatory scheme to control the discharge of
pollutants into the nation’s waters; the discharge of pollutants without a permit violates the act.
Five federal court cases testing the relationship between FIFRA and the CWA have drawn
attention since 2001. In two cases concerning pesticide applications by agriculture and natural
resources managers, the U.S. Ninth Circuit Court of Appeals held that CWA permits are required
for at least some discharges of FIFRA-regulated pesticides over, into, or near U.S. waters. It held
in a third case that no permit was required for the specific pesticide in question. Two other
pending cases involve the use of pesticides for mosquito control. In these cases, the U.S. Second
Circuit Court of Appeals has not yet addressed whether the application of FIFRA-approved
pesticides requires a CWA discharge permit.
The judicial rulings alarmed a range of stakeholders who fear that requiring CWA permits for
pesticide application activities would present significant costs, operational difficulties, and
delays. Pressed by many to clarify its long-standing principle that CWA permits are not required
for using FIFRA-approved products, EPA in November 2006 issued a rule to formalize that
principle in regulations. Environmental activists strongly opposed EPA’s actions, arguing that
FIFRA does not protect water quality from harmful pollutant discharges, as the CWA is intended
to do. Other stakeholders, such as pesticide applicators, endorsed the rule, although some would
like to see its application broadened to include pesticide drift. The EPA rule was challenged, and
in January 2009 a federal court vacated the regulation. Several industry groups petitioned for a
rehearing by the full Sixth Circuit Court of Appeals, while the federal government asked the court
to stay for two years the order vacating the exemption, to provide time for working with states to
develop a general permit for pesticide applications covered by the decision. The court granted the
government’s request for a two-year delay on June 8.
Some believe that the controversy will only be resolved by congressional action to clarify the
intersecting scope of the Clean Water Act and FIFRA. Legislation intended to do so by codifying
EPA’s policy in law was introduced in the 109th Congress, but it was not enacted. For now, it is
unclear whether these issues will receive new attention in the 111th Congress.
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Pesticide Use and Water Quality: Are the Laws Complementary or in Conflict?
Contents
Introduction ................................................................................................................................ 1
The Laws .................................................................................................................................... 2
The Litigation ............................................................................................................................. 3
The Ninth Circuit Cases ........................................................................................................ 4
The Second Circuit Cases...................................................................................................... 6
Other Litigation .................................................................................................................... 6
EPA’s Regulatory Responses ....................................................................................................... 7
EPA’s 2003 Interim Guidance................................................................................................ 7
Responses to the 2003 Interim Guidance ............................................................................... 8
Final Guidance and Proposed Rulemaking ............................................................................ 9
Rulemaking Proposal .......................................................................................................... 10
Final Rule ........................................................................................................................... 11
Judicial Challenge to the Final Rule .................................................................................... 12
Congressional Interest and Future Options ................................................................................ 12
Options for EPA and Congress ............................................................................................ 13
Contacts
Author Contact Information ...................................................................................................... 16
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Pesticide Use and Water Quality: Are the Laws Complementary or in Conflict?
Introduction
It has been noted that “[t]he potential for overlapping and potentially conflicting regulatory scope
between federal statutes is common, especially in the heavily regulated area of environmental
protection.”1 This potential has received attention in connection with implementation of the
Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA)2 and the Federal Water Pollution
Control Act (Clean Water Act, CWA).3 FIFRA requires the Environmental Protection Agency
(EPA) to regulate the sale and use of pesticides in the United States through registration and
labeling. The CWA is the principal federal law governing pollution in the nation’s surface waters.
Pesticides used to control weeds, insects, and other pests receive public attention because of
potential impacts on humans and the environment. Depending on the chemical, possible health
effects from overexposure to pesticides include cancer, reproductive or nervous-system disorders,
and acute toxicity. Similar effects are possible in the aquatic environment. Recent studies suggest
that some pesticides can disrupt endocrine systems and affect reproduction by interfering with
natural hormones.4 However, many pesticides and their breakdown products do not have
standards or guidelines, and current standards and guidelines do not yet account for exposure to
mixtures and seasonal pulses of high concentrations. Effects of pesticides on aquatic life are a
concern, because intensive surveys done by the U.S. Geological Survey found that more than
one-half of streams sampled had concentrations of at least one pesticide that exceeded an EPA
guideline for the protection of aquatic life. Whereas most toxicity and exposure assessments of
pesticides are based on controlled experiments with a single contaminant, sampling by the U.S.
Geological Survey found that most contamination of waterbodies occurs as pesticide mixtures.5
For the more than 30 years since Congress enacted FIFRA and the Clean Water Act, there has
been little apparent direct conflict between them. EPA’s operating principle during that time has
been that pesticides used according to the requirements of FIFRA do not require regulatory
consideration under the CWA. EPA has never required CWA permits for use of FIFRA-approved
materials, and EPA rules currently do not specifically address the issue. However, EPA’s
interpretation and operating practice regarding the relationship between the two laws have
recently been challenged in several arenas. Federal courts have been one of two battlegrounds so
far where the potential conflict between the regulatory scope of these two laws has been waged.
EPA regulatory proceedings have been the second battleground area. Congressional action could
add a third testing of the issues.
At issue is how FIFRA-approved pesticides that are sprayed over and into waters are regulated
and, specifically, whether the FIFRA regulatory regime is sufficient alone to ensure protection of
water quality or whether such pesticide application requires approval under a CWA permit. The
1 Randall S. Abate and Matthew T. Stanger, “Pesticides and Water Don’t Mix: Addressing the Need to Close a
Regulatory Gap Between FIFRA and the CWA,” Environmental Law Reporter News & Analysis, January 2005, p.
10056.
2 7 U.S.C. §§136-136y.
3 33 U.S.C. §§1251-1387.
4 For information, see CRS Report R40177, Environmental Exposure to Endocrine Disruptors: What Are the Human
Health Risks?, by Linda-Jo Schierow and Eugene H. Buck.
5 U.S. Department of the Interior, U.S. Geological Survey, The Quality of Our Nation’s Waters, Nutrients and
Pesticides, USGS Circular 1225, 1999, pp. 3-9.
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issue arose initially over challenges to some routine practices in the West (weed control in
irrigation ditches and spraying for silvicultural pest control on U.S. Forest Service lands). It
subsequently drew more attention in connection with efforts by public health officials throughout
the country to combat mosquito-borne illnesses such as West Nile virus. The litigation created
uncertainty over whether application of pesticides and herbicides to waterbodies requires a water
discharge permit. EPA tried to promulgate policy to clarify the relationship of the two laws and to
address conflicts resulting from several judicial rulings, ultimately in a regulation issued in
November 2006. That rule was challenged by multiple parties, and in January 2009, a federal
appellate court vacated the rule. A related issue of interest to many pesticide applicators, but not
yet addressed by EPA policy or rule, concerns pesticides that unintentionally impact waterbodies
through drift or migration from nearby land, such as a field of crops.
This report provides background on the conflict over interpretation and implementation of FIFRA
and the Clean Water Act. A brief discussion of the two laws is followed by a review of the major
litigation of interest. EPA’s efforts to clarify its policy in this area and the November 2006 final
rule and the 2009 federal court ruling are discussed, as well as possible options for EPA and
Congress to further address the FIFRA-CWA issues.
The Laws
FIFRA is a regulatory statute governing the licensing, distribution, sale, and use of pesticides,
including insecticides, fungicides, rodenticides, and other designated classes of chemicals. Its
objective is to protect human health and the environment from unreasonable adverse effects of
pesticides. To that end, it establishes a nationally uniform pesticide labeling system requiring the
registration of all pesticides and herbicides sold in the United States, and requiring users to
comply with conditions of use included on the national label. A FIFRA label encompasses the
terms on which a chemical is registered, and its requirements become part of FIFRA’s regulatory
scheme. In registering the chemical, EPA makes a finding that the chemical “when used in
accordance with widespread and commonly recognized practice ... will not generally cause
unreasonable adverse effects on the environment” (7 U.S.C. §136a(c)(5)(D)).
EPA reviews scientific data submitted by pesticide manufacturers on toxicity and behavior in the
environment to evaluate risks and exposure associated with the pesticide product’s use and takes
into account the costs and benefits of various pesticide uses. If a registration is granted, the
agency specifies the approved uses and conditions of use, which the registrant must explain on
the product label. EPA may classify and register a pesticide product for general use or for
restricted use (those judged to be more dangerous to the applicator or to the environment which
can only be applied by or under the direct supervision of a person who has been trained and
certified). FIFRA preempts state, local, and tribal regulations stricter than or different from EPA
rules with respect to labeling requirements, but allows states and localities to adopt more
restrictive conditions with regard to sale and use.
Use of a pesticide product in a manner not consistent with its label is prohibited, and the law
provides civil and criminal penalties for violations. Under FIFRA, EPA generally enforces the
law’s requirements. However, the law also gives states with adequate enforcement procedures,
laws, and regulations primary authority for enforcing FIFRA provisions related to pesticide use.
The objective of the CWA is to “restore and maintain the chemical, physical, and biological
integrity of the Nation’s waters.” To that end, it creates a comprehensive regulatory scheme to
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control the discharge of waste and pollutants; the discharge of pollutants into waters of the United
States without a permit violates the act. The permit requirement is at the heart of the act’s
compliance and enforcement strategy. Several aspects of these core requirements in the law are
important to evaluating whether the CWA applies to specific activities, including whether there is
a discharge from a point source (a discrete conveyance such as a pipe, ditch, container, vessel, or
other floating craft), whether the discharge is made into waters of the United States, and whether
the material discharged is a pollutant; all of these terms are defined in the act. Especially key in
the current context is whether pesticides are pollutants under the act. This issue has been central
to much of the judicial and regulatory debate over whether the two laws, CWA and FIFRA, are
complementary or in conflict. CWA Section 502(6) (33 USC §1362(6)) defines pollutant thus:
The term ‘pollutant’ means dredged spoil, solid waste, incinerator residue, sewage, garbage,
sewage sludge, munitions, chemical wastes, biological materials, radioactive materials, heat,
wrecked or discarded equipment, rock, sand, cellar dirt and industrial, municipal, and
agricultural waste discharged into water.
Section 402 of the act establishes the National Pollutant Discharge Elimination System (NPDES)
permitting requirement, which regulates the lawful discharge of pollutants. The act defines
“discharge of a pollutant” to mean “any addition of any pollutant to navigable waters from any
point source” (CWA Section 502(12); 33 USC §1362(12)). Discharges are permitted if they are
authorized under a NPDES permit that meets CWA requirements, including protecting the
receiving waters. NPDES permits specify limits on what pollutants may be discharged and in
what amounts. They also include monitoring and reporting requirements. They are either
individual case-by-case permits or general permits applicable to similar categories of activities
and similar waste discharges. Under the CWA, qualified states issue NPDES permits to regulated
sources and enforce permits, and the law allows states to adopt water quality requirements more
stringent than federal rules. As of 2009, 46 states have been delegated authority to administer the
permit program; EPA issues discharge permits in the remaining states.
The NPDES permit is the act’s principal enforcement tool. EPA may issue a compliance order or
bring a civil suit in U.S. district court against persons who violate the terms of a permit, and
stiffer penalties are authorized for criminal violations of the act. As a practical matter, the
majority of actions taken to enforce the law are undertaken by states, both because states issue the
majority of permits to dischargers and because the federal government lacks the resources for
day-to-day monitoring and enforcement. In addition, individuals may bring a citizen suit in U.S.
district court against persons who violate the terms of a CWA-authorized permit or who discharge
without a valid permit. FIFRA does not authorize citizen suits.
Throughout the United States, pesticides often are applied in, onto, or near waterbodies to control
weeds and insects. Whether those pesticides are adversely affecting water quality has not been a
disputed issue until recently. It has been EPA’s long-standing practice and interpretation of the
laws that a CWA permit is not required when pesticide application is done in a manner consistent
with FIFRA and its regulations. But that interpretation has been challenged in several lawsuits
brought since the late 1990s that have been decided since 2001.
The Litigation
Five federal court cases testing the relationship between FIFRA and the CWA have drawn the
most attention, three in the U.S. Court of Appeals for the Ninth Circuit in the West, concerning
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pesticide applications by agricultural and natural resource managers, and two in the Second
Circuit Court of Appeals in the East, involving the use of pesticides by government and public
health authorities for mosquito control. These cases have been brought principally under the
citizen suit provisions of the CWA. Two of the Ninth Circuit decisions have held that CWA
permits are required for at least some activity involving the point source discharge of FIFRA-
regulated pesticides over or into waters of the United States, and the third held that a permit was
not required because the specific pesticide was not a chemical waste. The Second Circuit, while
not yet holding that a permit is not required, appears to some observers to be less willing to
interpret the CWA to require NPDES permits for application of FIFRA-regulated chemicals.6
Thus far, this appeals court has remanded two cases to district courts for further proceedings
involving related issues; it has not yet specifically addressed whether the application of FIFRA-
approved pesticides requires a CWA discharge permit, as the Ninth Circuit has.
The Ninth Circuit Cases
The first of the major cases on these issues involved application of herbicides in irrigation
ditches. In the case, a major issue was whether the application of pesticides constitutes the
discharge of a pollutant. Environmental groups challenged application of an aquatic herbicide
called Magnicide H to kill weeds and algae and sought to require that the applicator, a municipal
corporation that operates a system of irrigation canals in Oregon, obtain an NPDES permit.
The Ninth Circuit Court of Appeals endorsed the lower court’s ruling that the pesticide was a
pollutant under the CWA, and that the irrigation canals into which the pesticide was being
sprayed are “waters of the United States.”7 But it rejected the lower court’s holding that a CWA
permit was not required because the pesticide was properly regulated by FIFRA and had an EPA-
approved FIFRA label. The appeals court ruled that FIFRA and CWA have different purposes and
that, as such, neither could be controlling on the application of the other. The court said that
FIFRA creates a comprehensive regulatory scheme for the labeling of pesticides, requiring that all
insecticides and herbicides sold in the United States be registered with the EPA. It and the CWA
have different, although complementary, purposes, the court said, and using a pesticide with a
FIFRA-approved label does not obviate the need to obtain a CWA permit. The FIFRA label is the
same nationwide. The CWA permit considers local environmental conditions, which the FIFRA
label does not. Thus, a nationwide label on a FIFRA-regulated chemical could not be controlling
on whether a CWA permit is required, because it does not account for location-specific
requirements. The court reversed the district court’s grant of summary judgment in favor of the
defendants.8
Several of the states within the Ninth Circuit subsequently took actions to respond to this ruling.
California and Washington amended their water quality program rules to require NPDES permits
6 Randall S. Abate and Matthew T. Stanger, “Pesticides and Water Don’t Mix: Addressing the Need to Close a
Regulatory Gap Between FIFRA and the CWA,” Environmental Law Reporter News & Analysis, January 2005, p.
10055.
7 In view of the Supreme Court’s June 2006 decision in Rapanos v. United States (547 U.S. 715, 2006), coverage of
irrigation canals as “waters of the United States” may depend on case-specific circumstances, because the Court’s
plurality opinion in this case made specific reference to Headwaters, Inc. v. Talent Irrigation District. For additional
information, see CRS Report RL33263, The Wetlands Coverage of the Clean Water Act Is Revisited by the Supreme
Court: Rapanos v. United States, by Robert Meltz and Claudia Copeland.
8 Headwaters, Inc. v. Talent Irrigation District, 243 F.3d 526 (9th Cir. 2001).
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for pesticide applicators. Oregon did not mandate permits, but suggested that pesticide applicators
obtain state-issued permits to protect against lawsuits. Other states outside of the Ninth Circuit
have not issued permits for these types of activities.
The second major case in the West involved an annual U.S. Forest Service (USFS) aerial spray
program over national forest lands in Oregon and Washington. Environmental groups filed a
lawsuit challenging the spraying program, saying that the environmental impact statement (EIS)
prepared by the USFS was inadequate and that the Forest Service had failed to obtain a CWA
permit, which they argued is required for this type of aerial spraying. The appeals court reversed
the district court’s grant of summary judgment for the Forest Service and instructed the lower
court to enter an injunction prohibiting the federal agency from further spraying until it acquires
an NPDES permit and completes a revised EIS.9 The court disagreed with the argument of the
Forest Service that the spraying is nonpoint source water pollution, which does not require an
NPDES permit. The court held that the insecticides meet the CWA definition of “pollutant” and
that the application came from an aircraft equipped with spraying apparatus, thus meeting all of
the elements of the CWA’s definition of point source pollution.
In September 2003, the EPA General Counsel issued a legal memorandum to officials in states
located in the Ninth Circuit responding to the Forsgren case. The memorandum said that EPA
disagreed with the court’s holding in the case and that outside the Ninth Circuit, EPA would
continue its long-standing interpretation of FIFRA and the CWA. Within the Ninth Circuit, the
memo said, EPA would not acquiesce to the ruling in the case of materials other than pesticides
(such as those used for fire control), or in circumstances where pesticides are not applied directly
over and into waters of the United States.10
The third Ninth Circuit case involved an effort by the Montana Department of Fish, Wildlife and
Parks to intentionally apply the pesticide antimycin to a river in order to remove non-native trout
species and thus to allow re-introducing a threatened fish species into the river. The director of
the department was sued under the citizen suit provision of the CWA by a citizen who sought to
require the department to obtain an NPDES permit before applying the pesticide.
The court held in this instance that no NPDES permit was required, because the facts of the case
demonstrated that, following application as intended, the antimycin dissipated rapidly, leaving no
excess portions or residual chemical that should be characterized as chemical waste, and thus is
not a pollutant under the act.11 Intentionally applied and properly performing pesticides are not
pollutants, the court said.
The court distinguished this case from its ruling in Headwaters, saying that the factual scenarios
differ, because “in that case the ‘chemical waste’ for which a NPDES permit was required was not
a pesticide serving a beneficial purpose and intentionally applied to water, but was a chemical
that remained in the water after the Magnicide H performed its intended, beneficial function.”12
Further, the court stated that its analysis accords with EPA’s construction of the CWA’s definition
9 League of Wilderness Defenders/Blue Mountains Biodiversity Project v. Forsgren, 309 F.3d 1181 (9th Cir. 2002).
10 Robert Fabricant, EPA General Counsel, “Interpretive Statement and Guidance Addressing Effect of Ninth Circuit
Decision in League of Wilderness Defenders v. Forsgren on Application of Pesticides and Fire Retardants,”
memorandum, September 3, 2003, 7 pp.
11 Fairhurst v. Hagener, 422 F.3d 1146 (9th Cir. 2005).
12 Ibid. at 1150.
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of “chemical waste” in the context of intentionally applied pesticides, and that the agency’s 2003
Interim Statement and Guidance addressing the issue (discussed below) is entitled to some
deference. EPA’s interpretation as presented in that Interim Statement is reasonable and not in
conflict with the expressed intent of Congress, the court said.
The Second Circuit Cases
Two cases in the Second Circuit involved the use of pesticides for mosquito control. In the first
case, several residents of the Town of Amherst, N.Y., sought to halt aerial application of
pesticides without a CWA permit. The district court initially dismissed the case, stating that spray
drift is not chemical waste under the CWA and that the pesticide use was best regulated under
FIFRA. But the appeals court remanded the case to the district court for further development of
the record.13 Although this ruling may not be cited as precedent, it is notable in that, while EPA
had filed an amicus curiae brief providing its views on this particular case, the court invited EPA
to offer its views broadly on the policy and legal questions. The court stated:
Until the EPA articulates a clear interpretation of current law—among other things, whether
properly used pesticides released into or over waters of the United States can trigger the
requirement for NPDES permits ...—the question of whether properly used pesticides can
become pollutants that violate the CWA will remain open. Participation by the EPA in this
litigation in any way that permits articulation of the EPA’s interpretation of the law in this
situation would be of great assistance to the courts.14
The second pertinent case in the Second Circuit also involved the use of pesticides for control of
mosquitoes. Plaintiffs in the case, a citizens group, sought an injunction to halt the aerial and
ground spraying, arguing that although the pesticides were properly regulated under FIFRA, the
spraying program involved the discharge of a pollutant without a CWA permit, and thus was a
violation of that law. While the federal district court ruled that FIFRA’s refusal to allow
enforcement by citizen suit should prevail over the CWA’s allowance of such suits unless the
alleged violation of the CWA also constitutes a substantial violation of FIFRA, the appeals court
disagreed. It held that the CWA authorizes any citizen to bring suit to enforce its requirements,
regardless of whether the claimed CWA violation also violated FIFRA.15 The Second Circuit
remanded the case to the district court for further proceedings on the CWA claims. In June 2005
the district court rejected summary judgment motions by the parties, saying that disputed issues
of material fact exist as to whether the city has discharged a pollutant into navigable waters
without a permit.16
Other Litigation
Other lawsuits have followed these cases. For example, private citizens who operate an organic
fruit farm in Gem County, Idaho, brought suit against the local mosquito abatement district there,
seeking to require a CWA permit for pesticide spraying. Finding itself in the proverbial spot
“between a rock and a hard place,” the mosquito abatement district applied for a permit from
13 Altman v. Town of Amherst, N.Y., 47 Fed. Appx. 62 (2d Cir. 2002).
14 47 Fed. Appx. at 67.
15 No Spray Coalition v. City of New York, 351 F.3d 602 (2d Cir. 2003).
16 2005 Westlaw 1354041.
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EPA, which the agency declined to issue, based on its long-standing policy and legal
interpretation. Thereafter, the mosquito abatement district filed a lawsuit against EPA in an
attempt to obtain a declaration that a CWA permit is not needed and to avoid the citizen suit
litigation, which is pending in federal court in Idaho. The mosquito abatement district asked the
federal court either for a judgment saying that no permit is required or, if the court were to
determine otherwise, an order directing EPA to process its CWA permit application. In January
2005, the federal district court in the District of Columbia dismissed the case because the
mosquito abatement district and EPA were in agreement that no CWA permit is required for
pesticide applications that are consistent with FIFRA.17
In other locations, citizen groups have given notice, as required by the CWA, of possible lawsuits
to expand the precedent from the Ninth Circuit cases to other types of operations. Two actions, in
August 2004 and March 2005, were threatened against Maine blueberry farmers for failing to
obtain a CWA permit for spraying pesticides that may drift off-target from land into waterbodies.
In response to the litigation pressure, however, both farmers subsequently announced plans to
cease aerial spraying and instead rely on ground spraying, until such time as government or the
courts clarify the law.
EPA’s Regulatory Responses
The rulings by the Ninth Circuit in the Headwaters and Forsgren cases and possible endorsement
by other courts greatly alarmed a range of stakeholders in the regulated community, including
forestry, agriculture, and pesticide applicators, as well as municipal and public health officials
concerned with the need to control mosquitoes and other vectors associated with diseases such as
West Nile virus and malaria. They feared that CWA permit requirements would be extended to
agricultural and other activities that have not traditionally been regulated under the CWA. They
argue that if permits tailored to particular circumstances are deemed necessary, such requirements
would present significant costs, operational difficulties, and delays to applicators. They also
would put pressure on limited federal and state CWA permitting resources. In their view,
requiring permits will not be environmentally helpful, but the expense and long delays of
permitting proceedings will hamper programs that are needed for controlling pests that threaten
public health and crops. In response, EPA has issued two interpretive guidance documents (in
2003 and 2005) and in 2005 proposed a rulemaking to formalize its long-standing position on
CWA-FIFRA issues. A final rule was promulgated in November 2006 but was vacated by a
federal court in 2009, as discussed below.
EPA’s 2003 Interim Guidance
Since the Altman v. Town of Amherst ruling in 2002, industry, states, and others, including some
in Congress, have pressed EPA to clarify the emerging conflicts over the two laws. EPA
responded in July 2003 with an Interim Statement and Guidance memorandum.18 In it, EPA
presented its interpretation of whether an NPDES permit is required for the application of
pesticides that comply with FIFRA. EPA’s position was that application of pesticides either
17 Gem County Mosquito Abatement District v. EPA, 398 F. Supp. 2d 1 (D.D.C. 2005)
18 U.S. Environmental Protection Agency, “Interim Statement and Guidance on Application of Pesticides to Waters of
the United States in Compliance with FIFRA,” 68 Federal Register 48385, August 13, 2003.
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directly in U.S. waters or aerially above or near the waters to control pests does not require a
CWA permit, so long as the use is done in compliance with relevant FIFRA requirements. The
memorandum acknowledged the federal court’s holding to the contrary in the Headwaters v.
Talent case, but then described why EPA concludes otherwise. Under the agency’s evaluation,
pesticides applied in a manner consistent with FIFRA do not constitute either chemical wastes or
biological materials under the definition of pollutant in Section 502(6) of the CWA. The rationale
for this position is that it is consistent with over 30 years of CWA administration.19 The
memorandum noted that pesticide applications in violation of FIFRA, that is, when not used or
applied according to applicable labeling requirements, would be subject to all relevant statutes,
including the Clean Water Act. EPA invited public comments on the interim guidance statement
through October 14, 2003, but the position stated in the memorandum took effect immediately
and would apply until EPA issues a final position on the matter.
The Interim Statement addressed in detail the question of whether, in EPA’s view, pesticides are
pollutants, within the meaning of CWA Section 502(6), since the discharge of pollutants is
regulated under that act. In the memorandum, EPA argued that chemical pesticides are not wastes,
and therefore are not pollutants, because they are “EPA-evaluated products designed, purchased
and applied to perform their intended purpose of controlling target organisms in the
environment.”20 Neither does EPA believe that biological pesticides (e.g., products derived from
plants, fungi, bacteria, or other non-man-made synthesis and which can be used for pest control
that usually do not have toxic effects on animals and people, compared with many chemical
pesticides) are pollutants. Both chemical and biological pesticides are intended to perform
essentially similar functions, and it would be “nonsensical” to treat chemical and biological
pesticides differently.21
Responses to the 2003 Interim Guidance
The 2003 guidance was issued in part to clarify the agency’s interpretations of legal rulings on the
issue and to remove any uncertainty regarding application of herbicides and pesticides to combat
vector-borne diseases that are transported by mosquitoes. However, EPA’s guidance satisfied few
stakeholders, for differing reasons.
Environmental activists strongly objected to EPA’s position, which they argued is contrary to the
judicial rulings. These groups reiterated points made by the Ninth Circuit court in the Headwaters
and Forsgren rulings, namely that chemical and biological pesticides are pollutants within the
meaning of the CWA, as the law defines pollutants broadly and includes, among other substances,
chemical wastes, biological materials, and agricultural wastes. As that court has declared,
environmentalists said, FIFRA does not override the CWA, and the two statutes must work in
tandem to prevent injury to aquatic life. They also argued that EPA is wrongly deciding that
materials with beneficial uses should not be construed as pollutants under the CWA.
Environmentalists’ objections also went to the policy problems of relying on FIFRA to protect
water quality from pesticide applications, as that would be the result of EPA’s position. That
position, critics said, turns on whether the pesticide application conforms procedurally with
19 Ibid., p. 48387.
20 Ibid., p. 48388.
21 Ibid.
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FIFRA requirements, not what is the water quality impact of that pesticide. Other concerns raised
by critics included the fact that while the FIFRA registration process calls for ecological risk
assessment that may be adequate for producing nationally applicable labels, it does not ensure
that local water quality standards are maintained and does not account for additive or synergistic
effects of multiple pollutants discharged to a particular waterbody. Environmentalists argued that
the CWA provides the means to determine whether, and under what conditions, it is safe to
discharge a particular pesticide into a particular body of water, and that FIFRA’s nationally
uniform labeling system cannot do that. FIFRA is not specifically charged with ensuring the
chemical, physical, and biological integrity of U.S. waterways, and satisfaction of a pesticide’s
FIFRA labeling criteria does not automatically satisfy water quality concerns, as the NPDES
permit process is intended to do. They also maintained that FIFRA fails to consider the lasting
effects that pesticide residues have on a local ecosystem and that localized analysis of the
environmental impact of pollutant discharges under the CWA is necessary, due to the toxic
residues that remain after pesticide application, which FIFRA does not address.
Additionally, activists said, FIFRA has no provisions for publicly accessible compliance
information and no means of citizen enforcement in case of violations, as does the CWA. FIFRA
essentially assumes users’ compliance with restrictions on a pesticide’s label.
Industry welcomed the thrust of the 2003 Interim Statement but also urged that it be broadened.
Agricultural groups requested that EPA include other classes of applications under the guidance,
such as aquaculture and crop production. Beyond the types of uses described in the guidance,
some argued that EPA should additionally clarify that CWA permits are not required in the case of
pesticides that are applied over land and then inadvertently impact waterbodies through drift and
migration. Many of these commenters requested that EPA address the issues definitively in a
rulemaking, rather than in non-binding guidance. In their view, without clear regulatory language
supporting EPA’s interpretation, pesticide applicators would still face the prospect of citizen
lawsuits and NPDES permit requirements.
Many states and local governments, including agriculture agencies, irrigation districts, and
mosquito abatement districts, strongly endorsed EPA’s proposed clarification of its interpretation
of the two laws. However, a few—especially states located in the jurisdiction of the federal Ninth
Circuit—expressed a different view. The Oregon Department of Environmental Quality and
California State Water Resources Control Board commented that the Interim Statement conflicted
with legal precedent in the Headwaters case. They urged EPA, if it wishes to create an exemption
for pesticide applications conducted in compliance with FIFRA, to ask Congress to amend the
Clean Water Act and FIFRA accordingly.
Final Guidance and Proposed Rulemaking
In January 2005, 18 months after issuing the Interim Guidance memorandum and considering
public comments on it, EPA issued final guidance in the form of an Interpretive Statement and
Guidance and simultaneously proposed a formal rulemaking to codify the substance of the
guidance in CWA regulations.22
22 U.S. Environmental Protection Agency, “Application of Pesticides to Waters of the United States in Compliance
With FIFRA, proposed rulemaking and notice of interpretive statement,” 70 Federal Register 5093, February 1, 2005.
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The 2005 Interpretive Statement closely mirrored the 2003 Interim Statement and Guidance. EPA
modified the 2003 guidance in several minor ways, such as clarifying that compliance with
“relevant requirements under FIFRA” refers to requirements relevant to protection of water
quality and clarifying that the exclusion from permit requirements applies to control of pests on
or above U.S. waters and pests near water, as well. The final Interpretive Statement did not
endorse the expansion sought by some to clarify that CWA permits also are not required for
pesticide applications to land and crops that may drift to nearby waterbodies.
Press reports indicated that EPA termed the final policy an “interpretive statement” rather than
“guidance” in an effort to get more deference from the courts when agency policies face legal
challenge. EPA also hoped that, because the agency solicited public comments on the 2003
Interim Statement, courts would give deference to the final policy.23
In public comments on the 2003 interim guidance, a number of critics had argued that EPA’s
interpretation of the two laws represented a reversal of positions the agency had taken in the
Forsgren case when it supported environmentalists’ appeal of the district court’s original ruling,
as well as its position in amicus curiae briefs in other litigation. In its amicus brief in Forsgren,
EPA stated that the regulatory review required by each of the statutes is different and considers
different factors and that FIFRA does not take into account all factors needed to judge whether a
particular pesticide discharge should be permitted under the CWA. Responding to those points,
the EPA General Counsel issued a memorandum in January 2005 to explain some of those prior
statements. The memorandum acknowledged that there could seemingly be inconsistencies in
previous government positions but argued that, on detailed examination, differences are based on
the specific facts of the litigation, not the general policies now being addressed. Moreover, in the
current context, the Interpretive Statement fully reflects “the exercise of the Agency’s legal and
policy judgment after considering public comments” and “the evolution in the Agency’s thinking
in certain respects since the brief was filed in that case.”24
Rulemaking Proposal
Simultaneously with issuance of the Interpretive Statement and Guidance in January 2005, EPA
also proposed a rulemaking to codify the Interpretive Statement. The proposed rule would modify
EPA regulations (40 CFR §122.3) to specify that NPDES permits are not required for the
application of pesticides to U.S. waters consistent with all relevant requirements under FIFRA in
order to control pests that are present over waters of the United States, including near such
waters, that results in a portion of the pesticides being deposited to U.S. waters. EPA rules
previously had not addressed the relationship of the two laws on this issue.
The CWA allows states to adopt water quality policies and rules more stringent than EPA
requires. As noted above, some stakeholders feared that, so long as EPA’s policy was articulated
just as guidance, states could choose to require CWA permits for pesticide application. Thus, one
rationale for formalizing the EPA policy in a rule was presumably to restrict that possibility. In the
2005 Interpretive Statement, EPA said that, under the agency’s interpretation, “a pesticide
applicator is assured that complying with relevant requirements under FIFRA will mean that the
23 Susan Bruninga, “Discharge Permit Not Needed for Application of Pesticides, EPA Proposed Rule, Policy Say,”
Daily Environment Report, January 27, 2005, p. A-9.
24 Ann R. Klee, EPA General Counsel, “Analysis of Previous Federal Government Statements on Application of
Pesticides to Waters of the United States in Compliance with FIFRA,” Memorandum, January 24, 2005, pp. 1-2.
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activity is not also subject to the distinct NPDES permitting requirements of the CWA.”25
However, somewhat inconsistently, EPA also noted that the policy does not preclude states from
further limiting the use of a particular pesticide in order to address local water quality concerns.
Final Rule
The 2005 guidance and proposed rule allowed a second opportunity for the public to comment on
EPA’s policy. After reviewing those comments, EPA promulgated a final rule in November 2006
to formalize its interpretation of the CWA-FIFRA issues.26 The final rule, which became effective
January 26, 2007, substantially tracked the 2005 proposal to revise the NPDES program rules to
add two specific circumstances that are excluded from NPDES permit requirements, when the
application complies with relevant requirements of FIFRA:
• the application of pesticides directly to waters of the United States in order to
control pests (e.g., to control mosquito larvae or aquatic weeds); and
• the application of pesticides to control pests that are present over waters of the
United States, including near such waters, where a portion of the pesticides will
unavoidably be deposited to waters of the United States in order to target the
pests effectively.
EPA modified the 2005 proposal only to clarify the types of pesticide applications covered in the
second circumstance to be those where the pesticide necessarily must enter the water to achieve
its intended purpose. For example, “mosquito adulticide applications can result in some pesticide
product entering the water because adult mosquitoes generally live over and adjacent to
waterbodies.”27
In the final rule, EPA provided a lengthy discussion of its rationale that pesticides, when applied
pursuant to FIFRA, are not chemical wastes or biological materials and thus are not what the
CWA defines as “pollutants” (see discussion, page 3). However, EPA also acknowledged that
application of pesticides may leave residual materials in U.S. waters after the product has served
its beneficial purpose and that these residual materials may be “pollutants” under the act at that
later time. Nonetheless, even in such cases, EPA said, the initial application of the pesticide does
not require an NPDES permit because EPA does not consider it to be a pollutant at the time of its
discharge into water.28 The agency also responded to some public comments on the proposal that
had criticized the adequacy of the FIFRA registration process for consideration of water quality,
local conditions, etc. EPA said that the “regulatory and non-regulatory tools under FIFRA provide
means of addressing water quality problems arising from the use of pesticides,” particularly the
registration and re-registration processes, which consider both human health and aquatic resource
impacts.29
25 70 Federal Register 5100.
26 U.S. Environmental Protection Agency, “Application of Pesticides to Waters of the United States in Compliance
With FIFRA,” Final Rule, 71 Federal Register 68483, November 27, 2006.
27 Id. at 68486.
28 Id. at 68487.
29 Id. at 68488-68489.
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Judicial Challenge to the Final Rule
The rule prompted multiple lawsuits by industry and environmental groups in almost every
judicial circuit nationwide. The litigation was consolidated in the Sixth Circuit Court of Appeals.
Industry’s challenge argued that the rule is arbitrary and capricious because it treats pesticides
applied in violations of FIFRA as pollutants, while treating the same pesticides used in
compliance with FIFRA as non-pollutants. It also sought to expand the rule to apply to all
pesticides and all agricultural applications of pesticides, including applications to land that drift
over or into water. Environmentalists’ challenge claimed that, by exempting FIFRA-compliant
applications of pesticides from CWA requirements, EPA ignores its duties under the Clean Water
Act.
The court’s ruling was issued January 7.30 EPA had argued that at the time of discharge, a
pesticide is a non-pollutant. Excess pesticide or pesticide residues do not exist until after the
discharge is complete, EPA said, and therefore should be treated as nonpoint source pollutants
that do not require CWA permits. The court rejected EPA’s attempt to “inject[] a temporal
requirement to the ‘discharge of a pollutant,’” and it said that such an interpretation is
unsupported by the CWA, and is also contrary to the purpose of the permitting program. The
court said, “If the EPA’s interpretation were allowed to stand, discharges that are innocuous at the
time they are made but extremely harmful at a later point would not be subject to the permitting
program.” It concluded that “there is no room for the EPA’s argument that residual and excess
pesticides do not require an NPDES permit,” and the court thus vacated the rule.
Congressional Interest and Future Options
Congressional interest in these issues became apparent after the first federal appeals court ruling
in one of the key FIFRA-CWA cases, the 2001 Headwaters v. Talent ruling. Two congressional
hearings held since then focused on implications of the cases for pesticide use generally and for
local governments’ efforts to control mosquito-borne illnesses such as West Nile Virus. A hearing
also was held on legislation introduced in the 109th Congress to clarify the scope of the CWA
regarding the use of FIFRA-approved pesticides, fire retardants, and biological control organisms.
In October 2002, a House Transportation and Infrastructure subcommittee held a fact-finding
hearing on the issues.31 The subcommittee’s particular concern derived in part from the fact that
one of the key practices used to manage stormwater runoff, which is regulated under the Clean
Water Act, is to collect and hold it in retention ponds, basins, drainage ditches, etc. Such practices
can be at odds with the public health objective of controlling insect-breeding habitat by
eliminating or draining sources of standing water. Stormwater management practices typically
allow collected water to drain slowly, while public health efforts would prefer that it be removed
quickly. Another way to address the public health concerns is to spray pesticides on stormwater
management structures and other areas of standing waters. The question for this subcommittee
was the uncertainty raised by the litigation over the CWA-FIFRA issues for communities,
industries, and others needing to maintain stormwater control systems. An EPA official, while
30 National Cotton Council of America v. U.S. Environmental Protection Agency, 553 F.3d 927 (6th Cir. 2009).
31 U.S. Congress, House, Committee on Transportation and Infrastructure, Subcommittee on Water Resources and
Environment, “West Nile Virus: The Clean Water Act and Mosquito Control,” Hearing, October 10, 2002, 107th Cong.,
2nd sess., unpublished.
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acknowledging that the issue of CWA jurisdiction over pesticide spraying is “new territory” for
the agency, said that EPA believes there is no inherent conflict between protecting water quality
and preventing mosquito-borne disease. At the hearing, some Members and public witnesses
urged EPA to provide guidance to resolve uncertainties raised by the court rulings.
A hearing held by a House Government Reform subcommittee in October 2004 examined
challenges to controlling West Nile Virus.32 The hearing was an opportunity for some Members
and witnesses to express the view that EPA’s July 2003 interim guidance, while helpful in
clarifying EPA’s position, failed to resolve all legal uncertainty, since it would not bind non-
federal entities or bar citizen lawsuits. Witnesses said that EPA’s guidance is a nonbinding legal
document that would not deter filing of citizen lawsuits seeking to impose a permit requirement.
Supporters of this view urged EPA to settle the legal questions through a formal rulemaking to
revise CWA rules. An EPA official said that even if EPA were to promulgate a rule (as it
subsequently did), states will still have the discretion to continue to require non-NPDES permits,
and a formal rule would not preclude citizen lawsuits from seeking to force localities to file for
permits. EPA made these same points in the January 2005 Interpretive Statement, as noted above.
Others at this hearing agreed on the need for a formal rulemaking, but recommended that in doing
so, EPA should reverse the interpretation detailed in the guidance, not codify it.
In the 108th Congress, Senate appropriators included language in their report on EPA’s FY2005
funding bill calling on EPA to finalize the interim guidance by December 2004 and to clarify the
long-standing distinction between agriculture and silviculture activities that do and do not require
CWA permits.33
In 2003, a number of House and Senate Members urged the Bush Administration to support
Supreme Court review of the Forsgren case, but ultimately the Administration did not endorse
industry’s request for a review, and the Court did not grant certiorari. Some Members of Congress
also submitted comments in support of the July 2003 interim guidance document and the January
2005 regulatory proposal.34
Options for EPA and Congress
As described above, in January 2009, a federal court rejected EPA’s rationale for its 2006 rule that
attempted to specify circumstances in which pesticides applied to waters of the United States do
not require NPDES permits. The court appeared to leave little room for EPA to fashion a new rule
consistent with the agency’s long-standing view that FIFRA-compliant applications do not
require CWA permits. Agriculture industry groups are fearful that the court’s ruling will lead to
permit requirements for each pesticide application, placing significant burdens on industry and
EPA. Accordingly, several industry groups (the Farm Bureau Federation, American Forest and
32 U.S. Congress, House, Committee on Government Reform, Subcommittee on Energy Policy, Natural Resources and
Regulatory Affairs, “Current Challenges in Controlling the West Nile Virus,” Hearing, October 6, 2004, 108th Cong.,
2nd sess. (Serial No. 108-274), 182 p.
33 U.S. Senate, Committee on Appropriations, “Departments of Veterans Affairs and Housing and Urban Development,
and Independent Agencies Appropriations Bill, 2005,” report to accompany S. 2825, 108th Cong., 2nd sess., pp. 110-
111.
34 Materials included in the EPA docket, No. OW-2003-0063, including submissions by Members of Congress, can be
found at http://www.regulations.gov.
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Paper Association, and CropLife America, the trade organization for agriculture and pest
management) petitioned for a rehearing of the case by the full Sixth Circuit Court of Appeals.
The federal government did not seek a rehearing of the case. Instead, the government petitioned
the court for a two-year stay of the order vacating the exemption, to give EPA time to work with
states and the regulated community to develop a general permit for pesticide applications covered
by the decision. State water pollution agencies supported the government’s request for the two-
year delay, which the court granted on June 8. As a result, the court’s ruling is scheduled to take
effect on April 9, 2011.
The two basic types of NPDES permits are individual permits that are specifically tailored for an
individual discharger, and general permits that cover categories of point sources having common
elements and that discharge the same types of wastes. General permits allow the permitting
authority to allocate resources efficiently, especially when there is potentially a large number of
permittees, and to provide timely permit coverage. Both individual and general permits are
enforceable by the permitting authority and by private citizens (in federal court).
EPA uses its authority to issue NPDES general permits frequently, most recently having issued a
general permit to cover discharges incidental to the normal operation of vessels (Vessel General
Permit, or VGP) that applies to approximately 69,000 vessels.35 Typically, dischargers seeking
coverage under a general permit are required to submit a notice of intent to be covered by the
permit, but this can be modified. For example, in the VGP, EPA provided automatic coverage for
about 20,000 of the covered vessels. Still, even with general permits, development and
implementation issues will arise, including how EPA will specify applicable discharge limits
based on technology available to treat pollutant constituents found in the discharge (i.e., effluent
limits), and limits that are protective of the designated uses of the impacted water (i.e., water
quality-based effluent limits), as required by the CWA.
One issue that EPA could address, in addition to developing a general NPDES permit, is pesticide
drift, which many stakeholders had urged EPA to address in the final rule. The Federal Register
Notice accompanying the rule noted that, at the time, EPA was awaiting advice from a workgroup
of its Pesticide Program Dialogue Committee, which could recommend further actions. This
committee was established in 1995 as a forum to provide feedback to EPA on various pesticide
regulatory, policy, and program implementation issues. It is authorized pursuant to the Federal
Advisory Committee Act (FACA), which details requirements for the management and oversight
of federal advisory committees to ensure impartial and relevant expertise and advice to EPA and
other agencies. In March 2006, the committee convened a Spray Drift Workgroup charged with
studying the issue of pesticide drift across water and its accompanying impact on water quality
and wildlife. In April 2007, the workgroup finalized a report that focused on issues related to
product labeling, applicator training, and practices and equipment to mitigate drift and adverse
effects. EPA subsequently drafted guidance to provide users with consistent and enforceable
directions about how to protect human health and the environment from potential adverse effects
from pesticide drift, but has not yet finalized new requirements or guidance.36
35 U.S. Environmental Protection Agency, “Final National Pollutant Discharge Elimination System (NPDES) General
Permit for Discharges Incidental to the Normal Operation of a Vessel,” 73 Federal Register 79473-79481, December
29, 2008.
36 For information, see http://www.epa.gov/pesticides/ppdc/.
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Other options for EPA relate to implementation of FIFRA and procedures used to evaluate the
risks of pesticides during the registration process. Environmentalists have argued for some time
that EPA’s risk review procedures are inadequate because they fail to account for synergistic and
additive effects, as well as sub-lethal and indirect effects of pollutants on the environment. In
2003, EPA convened a task force of officials from its pesticide and water quality offices to
explore, among other things, whether the agency’s pesticide review processes are protective
enough to meet water quality standard limits. One outcome of the task force’s ongoing review
could be changes to implementation of FIFRA in order to address some of these concerns. Thus,
in April 2009, EPA officials announced plans to complete a series of white papers by the fall of
2009 on how to harmonize methods used by the agency’s Office of Water and the Office of
Pesticide Programs for ecological assessment of pesticide chemicals’ water quality risks. The
white papers are intended to address what officials acknowledge is a gap between the way the
CWA and FIF approach pesticide risk.
Congress has several options, too, beginning with conducting further oversight of the issues.
Another option could involve legislation to revise the CWA and/or FIFRA, and some have urged
EPA to ask Congress to legislate a resolution of these possible conflicts.
For example, Congress could enact legislation to clarify that permits are not required for some or
all pesticide spraying activity, as favored by members of the pesticide application industry and
others, since many of these stakeholders believe that the November 2006 rule did not provide
adequate protection from citizen suits. In light of the federal court’s vacatur of that rule, these
groups may argue that passage of such legislation is even more urgent. Legislation intended to do
so was introduced in the 109th Congress (H.R. 1749 and S. 1269, the Pest Management and Fire
Suppression Flexibility Act), but it was not enacted. These bills would have provided that NPDES
permits are not required for the use of FIFRA-approved pesticides; chemicals, fire retardants, or
water used for fire suppression; biological organisms used for plant pest or weed control; or
silviculture activities such as timber harvesting that are not currently regulated as point source
activities.
As discussed above, EPA’s 2006 rule, now vacated by the court, addressed situations in which
pesticides are put directly in waters to control pests (e.g., controlling mosquito larvae or aquatic
weeds) or cases of pesticides that are present over water and a portion of the pesticide is
deposited in the water (e.g., aerial application to a forest canopy where waters of the United
States may be present below the canopy). The proposed legislation in the 109th Congress, in
addition to codifying these policies, also would have addressed other, broader circumstances that
EPA had declined to include in the rule: applications over land areas that may drift over and into
waters of the United States, broad exemption of activities for preventing or controlling plant pests
or noxious weeds, and use of fire retardants.37
In September 2005, a House Transportation and Infrastructure subcommittee held a hearing on
H.R. 1749.38 Witnesses representing a number of sectors that are pesticide users (state foresters,
western irrigation districts, and farmers) testified in support of the legislation, saying that it would
37 Reflecting a different approach, Rep. Goodlatte introduced a bill in the 107th Congress, H.R. 5329, that proposed
amending FIFRA to expand the definition of what constitutes a “public health” pesticide in an effort to ease industry’s
ability to register pesticides for use in combating mosquito-borne illnesses.
38 U.S. Congress, House, Committee on Transportation and Infrastructure, Subcommittee on Water Resources and
Environment, “Hearing, ‘H.R. 1749, Pest Management and Fire Suppression Flexibility Act,’” 109th Cong., 1st sess.,
September 29, 2005 (109-33), 110 pp.
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resolve existing legal uncertainties about permitting. An EPA witness said that the agency’s then-
proposed rulemaking was intended to reduce uncertainty about the relationship between FIFRA
and the CWA. The EPA official did not expressly endorse the legislation, but he said that EPA
appreciated congressional efforts to reduce potential confusion over these issues. There was no
further action on either H.R. 1749 or S. 1269 during the 109th Congress, and no similar legislation
was introduced in the 110th Congress.
Prior to the 2009 federal court ruling that vacated EPA’s rule, some environmental activists
favored legislation to clarify that NPDES permits are required, since they contended that the rule
was unlawful. However, no such legislation was introduced. Others argued during this time that
legislation is not needed because, in their view, the CWA is clear enough that permits are required
for discharge of pesticides from point sources. The federal court’s review of the EPA rule supports
that view. At the same time, many who would favor legislation to support a narrow view of the
CWA’s jurisdiction on this issue acknowledge that any such legislative effort would be
controversial and could be seen as representing not clarification but, rather, an environmental
rollback. The future direction of congressional attention to these issues, in light of the federal
court’s ruling, is unclear.
Author Contact Information
Claudia Copeland
Specialist in Resources and Environmental Policy
ccopeland@crs.loc.gov, 7-7227
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