Water Quality Assessment

David Waterstreet, Program ManagerWatershed Program307-777-6709
Clean Water Act (CWA) Section 401 Certification and Turbidity Waivers  
Eric Hargett (Cheyenne)CWA Section 401 Certification, Turbidity Waivers307-777-6701
Data Quality Assurance and Quality Control (QA/QC)  
Jillian Scott (Cheyenne)Data QA/QC307-777-6372
Nonpoint Source Pollution Program  
Alexandria Jeffers (Cheyenne)Nonpoint Source Program307-777-6733
Surface Water Monitoring Program  
Jeremy Zumberge, Program Supervisor (Sheridan)Surface Water Monitoring Program307-675-5638
Tavis Eddy (Lander)Surface Water Monitoring Program307-335-6957
Eric Hargett (Cheyenne)Surface Water Monitoring Program307-777-6701
Jason Martineau (Sheridan)Surface Water Monitoring Program307-675-5632
Triston Rice (Cheyenne)Surface Water Monitoring Program307-777-6353
Chad Rieger (Sheridan)Surface Water Monitoring Program307-675-5637
Michael Wachtendonk (Lander)Surface Water Monitoring Program307-335-6751
Surface Water Quality Standards  
Lindsay Patterson, Program Supervisor (Cheyenne)Surface Water Quality Standards307-777-7079
Kelsee Hurschman (Cheyenne)Surface Water Quality Standards, Harmful Cyanobacterial Blooms307-777-2073
Madeleine Hamel (Cheyenne)Surface Water Quality Standards, National Environmental Policy Act (NEPA)307-777-7050
Total Maximum Daily Load (TMDL) Program  
Ron Steg, Program Lead (Lander)Total Maximum Daily Load (TMDL)307-335-6980
Bret Callaway (Cheyenne)Total Maximum Daily Load (TMDL)307-777-5802
Water Quality Lab  
Steve Vien, Lab Supervisor (Cheyenne)Water Quality Lab307-777-7654
Alexandra Cook (Cheyenne)Water Quality Lab307-777-7151
Marisa Latady (Cheyenne)Water Quality Lab307-777-6783
Vacant (Cheyenne)Water Quality Lab307-777-3770
Rules and Regulations

All official Wyoming State Rules and Regulations are kept at the Wyoming Secretary of State's Office. Click here to view all current Rules and Regulations. 



This page contains a variety of downloadable Guidance documents pertaining to Water Quality Assessment procedures including:

  • Methods for Determining Surface Water Quality Condition


This page contains downloadable Water Quality Assessment reports, including an archive of Integrated 305(b) and 303(d) Reports. Additionally, the interactive map below provides facts sheets and shape files for download.

Related Programs

The Water Quality Assessment Program is responsible for ensuring that Wyoming remains in compliance with the federal Clean Water Act (CWA) by preparing and submitting the Integrated 305(b) and 303(d) Report to the US Environmental Protection Agency on a biennial basis. 

The Integrated Report (IR) contains information on the quality of Wyoming’s waters, including those waters that have been identified as not meeting water quality standards.

Section 305(b)
The CWA requires each state to submit a report to EPA every two years describing the status of its surface and ground waters. This document is commonly referred to as the “305(b) Report”, which includes an assessment of existing water quality in Wyoming, and an overview of past and proposed water pollution abatement efforts.

Section 303(d)
Section 303(d) of the CWA, and Title 40 part 130 of the Code of Federal Regulations (40 CFR part 130) requires each state to develop a list of waters that are not attaining water quality standards and are not expected to meet state water quality standards even after application of technology-based controls for point sources or other control requirements, such as best management practices (BMPs) for nonpoint sources of pollution. The 303(d) list is a subset of all of the impaired waters listed in the comprehensive 305(b) water quality report.  Section 303(d) also requires that states develop total maximum daily loads (TMDL) for all waters on the 303(d) list. Waters on the 303(d) list must be prioritized for TMDL development based on the severity of each listing. Each state must submit a 303(d) list of impaired and threatened waters to EPA by April 1st of each even numbered year. EPA must review and approve or disapprove the 303(d) list within 30 days of submittal.

Wyoming’s Integrated 305(b) and 303(d) Report combines the requirements of both reports into a single document.  The current and previous versions of Wyoming’s Integrated 305(b) and 303(d) Report are available in the reports section of this site.