January 7, 2016

COMPARISON OF 303(d) PESTICIDE IMPAIRMENT DATA WITH 2011 PGP 

ANNUAL REPORT DATA

As part of preparing for the issuance of the 2016 Pesticide General Permit (PGP), EPA examined

available information in December 2015 regarding whether uses of pesticides negatively impact water 

quality in waters of the United States. Exhibit 1, below, compares available CWA 303(d) impairment 

information regarding water quality impairments caused by pesticides for states expected to be covered 

by the 2016 PGP with pesticide/active ingredient information submitted pursuant to the annual report 

requirements in the 2011 PGP. The 303(d) data is from EPA’s Impaired Waters and TMDL webpage 

(http://water.epa.gov/lawsregs/lawsguidance/cwa/tmdl/ ) and reporting years are specified.

Exhibit 1 indicates:

 Of the 17 pesticide active ingredients identified on the relevant 303(d) lists as causes of water 

quality impairment, 7 of these pesticides have been cancelled1 and others have significant 

restrictions.

 Based on 2011 PGP annual report data,2 none of the 303(d) impairments caused by pesticides in 

states expected to be covered by the 2016 PGP for the 303(d) reported years were for pesticides 

applied under the 2011 PGP in those respective states.

3

Exhibit 1. Comparison of 303(d) Impairments Caused by Pesticides in States Expected to be Covered by 

the 2016 PGP with Pesticides Reported as Applied Under the 2011 PGP Annual Report Requirements 

State 303(d) Pesticide Causes of 

Impairment *

303(d) 

Reporting 

Year

Is this Pesticide/ Chemical

Identified as Applied in the PGP 

Annual Reports for the Relevant 

State (2012, 2013, 2014)

Pesticide Status**/

Notes

Massachusetts Chlordane 2012 No Cancelled

DDT No Cancelled

DEHP (Di-Sec-Octyl 

Phthalate) 

No

New Hampshire 2-Methylnaphthalene 2010 No

DDD No Cancelled

DDE No Breakdown product 

of DDT (has no uses)

DDT No Cancelled

Dieldrin No Cancelled

Endrin No Cancelled

Heptachlor No Cancelled

Indeno[1,2,3-Cd]Pyrene No

Lindane No Cancelled

 

1 DDE is also effectively cancelled with the cancellation of DDT.

2 Note that not all pesticide dischargers are required to submit annual reports. Annual reports are required from 

decision-makers required to submit an NOI and who are large entities, and decision-makers with discharges to 

water containing NMFS listed resources of concern. 

3

See sec. 1.1.2.1 of the PGP.
State 303(d) Pesticide Causes of 

Impairment *

303(d) 

Reporting 

Year

Is this Pesticide/ Chemical

Identified as Applied in the PGP 

Annual Reports for the Relevant 

State (2012, 2013, 2014)

Pesticide Status**/

Notes

Naphthalene No

Trans-Nonachlor No

New Mexico DDT (in fish tissue) 2014 No Cancelled

Idaho Chlorpyrifos 2012 No Applied in MA (2012-

2014), NM (2012) & 

OK (2012).

Malathion No Applied in NM in 

2012, 2013, 2014

Methyl Parathion No 12/31/99 EPA 

cancelled use on 

many types of crops 

used as foods. 

Emulsifiable 

concentrate 

formulations 

cancelled 4/30/97.

Puerto Rico Pesticides 2014 NA 303(d) data does not 

identify pesticide/ 

chemical

District of 

Columbia

Chlordane 2014 No Cancelled

DDD No Cancelled

DDE No Breakdown product 

of DDT (has no uses)

DDT No Cancelled

Dieldrin No Cancelled

Heptachlor Epoxide No Oxidation product of 

Heptachlor, which 

since 1988 is only 

registered for fire ant 

control in power 

transformers.

Guam Chlordane 2010 No Cancelled

Chlordane in Fish Tissue No Cancelled

Dieldrin No Cancelled

* http://iaspub.epa.gov/waters10/attains_nation_cy.control?p_report_type=T

** http://nepis.epa.gov/Exe/ZyPDF.cgi/20011E0G.PDF?Dockey=20011E0G.PDF

http://npic.orst.edu/ingred/specchem.html