Water Quality Assessment

Enforcement Actions

The DEQ undertakes enforcement actions to preserve safe environmental conditions throughout Wyoming. 

This page contains information on the enforcement actions that the Water Quality Division may undertake, as well as a record of enforcement actions that have been undertaken by WQD.

If the download box is not working below, please click here.

Electronic Documents Submittal

Electronic document submittal is available for WQD permit applications, reports, and other communications.
Visit:  WDEQ Water Quality Division Downloads

You do NOT need to follow up the electronic submission with a hard copy submission unless you are specifically contacted by a WQD staff person with a request to do so.

Need to report a spill or complaint? Please visit https://deqspills.wyo.gov/home

Submitting a public comment? WQD is unable to accept public notice comments through this system. Refer to the public notice document for instructions on how to submit comments or visit https://wq.wyomingdeq.commentinput.com/comment/search.

NOTICE: All applications for water distribution systems and/or sewage collection systems that are within the Cheyenne Board of Public Utilities (BOPU) district shall be submitted to the BOPU for approval. Contact Frank Strong or Bryce Dorr at (307) 637-6460, ENGreview@cheyennebopu.org, or http://cheyennebopu.org for additional information.

Recent General Permit Authorizations

The DEQ Water Quality Division accepts comments on all permits authorized under a general permit for a period of 30 days, as provided for in W.S. 35-11-801(d).

Interested persons may mail or fax comments to the main Cheyenne office. The ‘Date’ column in the table below indicates the date the authorization was posted to the website. Comments must be received before 5:00 pm on the 30th day after the authorization was posted to the website. For example, comments for an authorization posted on 10/1/18 must be received by 5:00 p.m. on 10/31/18. DEQ does not accept emailed comments.

You may sort the table by posting date or search for the type of general permit, the county where the permit was issued, the permit number, or the name of the person or company to whom the permit was issued.

If you wish to review the general permit documents, please go to the web page for each permitting program:

If the download box is not working below, please click here.

Proposed Rules and Regulations

Water Quality Rules Chapter 12

The Wyoming Environmental Quality Council will consider proposed revisions to the
Wyoming Department of Environmental Quality Water Quality Rules Chapter 12, Design and Construction Standards for Public Water Supplies, Docket 22-3103, at a hearing to be held on November 15, 2022 in the Capitol Extension Public Meeting Room 5, Herschler Building, 122 W. 25th Street, Cheyenne, WY, 82002, starting at 9:00 a.m. (MST). The revisions include new requirements for public water supplies that propose well acidization, updates to water treatment technologies, and the incorporation by reference of the Recommended Standards for Water Works, 2018 Edition. More information is available at: https://eqc.wyo.gov/Public/Pleadings.aspx?DocketId=4336

Water Quality Rules Chapter 3

The Department of Environmental Quality has revised Water Quality Rules, Chapter 3, Regulations for Permit to Construct, Install or Modify Public Water Supplies,
Wastewater Facilities, Disposal Systems, Biosolids Management Facilities, Treated
Wastewater Reuse Systems and Other Facilities Capable of Causing or Contributing to Pollution.

The Environmental Quality Council adopted the revised rules at a public hearing located at the Capitol Extension Public Meeting Room 5, Herschler Building, 122 W. 25th Street, Cheyenne, Wyoming on June 14, 2022. The final rule was filed with the Wyoming Secretary of State on August 19, 2022.

Electronic copies of the rule are available from the Secretary of State at rules.wyo.gov , under “Current Rules,” “Environmental Quality, Dept of (020),” “Water Quality,” “Chapter 3.”

Water Quality Rules Chapter 29

The Department of Environmental Quality has created a new rule: Water Quality Rules Chapter 29, Geologic Sequestration Special Revenue Account Requirements.

The Environmental Quality Council adopted the new rule at a public hearing located at the Capitol Extension Public Meeting Room 5, Herschler Building, 122 W. 25th Street, Cheyenne, Wyoming on June 14, 2022. The final rule was filed with the Wyoming Secretary of State on August 19, 2022.

Electronic copies of the rule are available from the Secretary of State at rules.wyo.gov, under “Current Rules,” “Environmental Quality, Dept of (020),” “Water Quality,” “Chapter 29.”

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.

Water Quality Assessment

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.

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

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.

Interactive Map

The TMDL and Assessment web map complements Wyoming’s 2020 Integrated 305(b) and 303(d) Report.  This tool is intended to provide efficient, point-and-click access to summary information about each of Wyoming’s assessed lakes and streams.  A pop-up box will appear upon selecting (i.e., pointing and clicking)  a waterbody that includes summary information about the assessed waterbody and a link to a one-page fact sheet.  Each fact sheet includes a link to the WDEQ’s complete assessment report and TMDL documents for the selected waterbody (if they are available for that waterbody).  For additional information, contact Ron Steg at (307) 335-6980 or ron.steg@wyo.gov.