Pesticide Water Models - Previous Versions
Go to our Models for Pesticide Risk Assessment page for current information and guidance related to pesticide risk assessments.
The superseded information on this page is provided as a courtesy and service for:
- those who desire access to water models information and guidance as used in historical pesticide risk assessments and
- those who lack resources to use more sophisticated, current EPA water models.
Surface Water - Superseded
PRZM, EXAMS, PRZM/EXAMS SHELL, GENEEC2
Ground Water - Superseded
More Useful Links - Superseded
- February 28, 2002
Guidance for Selecting Input Parameters in Modeling the Environmental Fate and Transport of Pesticides - September 9, 2010
Development and Use of Percent Cropped Area Adjustment Factors in Drinking Water Exposure Assessments - March 16, 2012
Development and Use of Percent Cropped Area and Percent Turf Area Adjustment Factors in Drinking Water Exposure Assessments: 2012 Update
PRZM (Pesticide Root Zone Model) - Superseded
PRZM is a surface water model that simulates chemical movement in soil within and immediately below the plant root zone. PRZM is often linked with EXAMS to develop refined exposure assessments of pesticide concentrations in aquatic environments.
EXAMS (Exposure Analysis Modeling System) - Superseded
EXAMS is a surface water model that evaluates the fate, transport, and exposure concentration of pesticides. EXAMS is frequently linked with PRZM to develop refined exposure assessments of pesticide concentrations in aquatic environments.
- Executable, Source Code, Documentation
- Water Models - EXAMS Environments (examsenv.zip) - SUPERSEDED(1 pg, 1 K)
PRZM/EXAMS SHELL - Superseded
PE Version 4.01 - Superseded
Approved Model Suite
- PE Version 4.01
(August 13, 2003) - PRZM v3.12beta
(May 24, 2001) - EXAMS v2.98.04
(July 18, 2002)
-
Executable
- PE Version 4.01 Script (pe4v01.pl) - SUPERSEDED(1 pg, 93 K) Extension .txt should be removed to use
- Crop Scenarios
- Meteorological Files
-
Documentation
PE Version 5.0 - Superseded
Approved Model Suite
- PE Version 5.0
(November 15, 2006) - PRZM v3.12.2
(May 12, 2005) - EXAMS v2.98.04.06
(April 25, 2005)Top of Page
-
Executable
- PE Version 5.0 Script (pe5.pl) - SUPERSEDED(1 pg, 112 K) Extension .txt should be removed to use
- PE5.0 Crop Scenarios (EXE) - Superseded(1 pg, 538 K) Version 3 (WinZip self-extracting .exe file)
- Meteorological Files
-
Documentation
- PE 5.0 User's Manual
- Standard Crop Scenario Metadata
- Outdoor Ornamental Nursery Scenario Metadata Files
- PE5 Metadata (DOC) - Outdoor Ornamental Nursery - Southern California(11 pp, 245 K)
- PE5 Metadata (DOC) - Outdoor Ornamental Nursery - Southern Florida(12 pp, 272 K)
- PE5 Metadata (DOC) - Outdoor Ornamental Nursery - Southern Michigan / North-eastern Illinois(11 pp, 251 K)
- PE5 Metadata (DOC) - Outdoor Ornamental Nursery - New Jersey / Eastern Pennsylvania(10 pp, 244 K)
- PE5 Metadata (DOC) - Outdoor Ornamental Nursery - Oregon(10 pp, 243 K)
- PE5 Metadata (DOC) - Outdoor Ornamental Nursery - Eastern Tennessee / Western North Carolina(12 pp, 284 K)
- Crop Scenario Metadata Files
- PE5 Standard Crop Metadata (DOC) - Indiana Corn(5 pp, 137 K)
- PE5 Standard Crop Metadata (DOC) - Iowa Corn(5 pp, 139 K)
- PE5 Standard Crop Metadata (DOC) - Kansas Corn(5 pp, 134 K)
- PE5 Standard Crop Metadata (DOC) - Minnesota Corn(5 pp, 138 K)
- PE5 Standard Crop Metadata (DOC) - Nebraska Corn(4 pp, 130 K)
- PE5 Standard Crop Metadata (DOC) - Michigan Melon(5 pp, 145 K)
- PE5 Standard Crop Metadata (DOC) - Missouri Melon(5 pp, 140 K)
- PE5 Standard Crop Metadata (DOC) - New Jersey Melon(5 pp, 134 K)
- Outdoor Ornamental Nursery Scenario Metadata Files
- Nonstandard Crop Scenario Metadata
GENEEC2 (GENeric Estimated Environmental Concentration) - Superseded
GENEEC is a surface water model that is used to assess exposure of pesticides to aquatic organisms and the environment.
- Executable (geneec2.exe)(1 pg, 81 K)
- Source Code (geneec2.for_.txt) (Fortran 77)(28 pp, 61 K) Extension .txt should be removed to use
- Description
- Users Manual
-
GENEEC2 for Windows 7© - Superseded
The GENeric Estimated Environmental Concentration (GENEEC 2.1) is a screening model to predict environmental concentrations of pesticides in surface water that was recompiled to operate in the Microsoft© Windows 7© environment. This is a legacy model of the Agency which there is no active support. It is posted here as a courtesy for end users who operate in the Windows 7© environment until December 31, 2016 at which time it will be removed from this website. For reference, the Surface Water Concentration Calculator (SWCC) is the official model currently utilized for estimating environmental concentrations of pesticides in surface water.
PRZM-GW - Superseded
- Executable (originalPRZMGW.msi) - SUPERSEDED(1 pg, 1 MB)
- Scenarios and Metadata (Remove the .txt extension to use Scenarios as .scn files)
- PRZM-GW Original Scenario - DelMarVa Sweet Corn - superseded(1 pg, 417 B)
PRZM-GW Original Metadata (DOC) - DelMarVa Sweet Corn - superseded(3 pp, 101 K, 18DEC2012) - PRZM-GW Original Scenario - Wisconsin Corn - superseded(1 pg, 397 B)
PRZM-GW Original Metadata (DOC) - Wisconsin Corn - superseded(3 pp, 103 K, 18DEC2012) - PRZM-GW Original Scenario - North Carolina Cotton - superseded(1 pg, 398 B)
PRZM-GW Original Metadata (DOC) - North Carolina Cotton - superseded(3 pp, 100 K, 18DEC2012) - PRZM-GW Original Scenario - Georgia Peanut - superseded(1 pg, 415 B)
PRZM-GW Original Metadata (DOC) - Georgia Peanut - superseded(3 pp, 101 K, 18DEC2012) - PRZM-GW Original Scenario - Florida Potato - superseded(1 pg, 405 B)
PRZM-GW Original Metadata (DOC) - Florida Potato - superseded(4 pp, 103 K, 18DEC2012) - PRZM-GW Original Scenario - Florida Citrus - superseded(1 pg, 461 B)
PRZM-GW Original Metadata (DOC) - Florida Citrus - superseded(4 pp, 105 K, 18DEC2012)
- PRZM-GW Original Scenario - DelMarVa Sweet Corn - superseded(1 pg, 417 B)
- PWC zip file (pwc_v1.5.zip) (1 pg, 1 MB, December 8, 2015)
- PWC User Manual (Version 1.50)