Wyoming Department of Environmental Quality

Surface Water Standards

Program Contact: David Waterstreet, Supervisor
307-777-6709
dwater@wyo.gov

Draft Chapter 1 Documents (Updated 9/24/08)
     ▪   Revised Draft Chapter 1 with Appendix H - Public Notice:EQC Hearings
     ▪   Revised Draft Statement of Principle Reason
     ▪   Appendix H Comparison Document: EQC remanded draft to current draft.
     ▪   Draft Implementation Policies
     ▪   Notice of Intent
       ▪   Analysis of Comments (WWAB)- June 15, 2007
     ▪   Analysis of Comments (WWAB)- September 14, 2007
    ▪   Analysis of Comments (WWAB)- December 7, 2007
     ▪   Analysis of Comments (EQC)- September 24, 2008

Water Quality for Wyoming Livestock and Wildlife: A Review of the Literature Pertaining to Health Effects of Inorganic Constituents-- (pdf)..

Current Standards
▪    Chapter 1 - Adopted - Surface Water Standards
▪    Implementation Policies - Adopted
▪    Interim Policy on Establishing Effluent Limits for Permitted Point Source Discharges to Class 1 Water Tributaries - Adopted
            Memorandum summarizing Interim Policy
▪    Wyoming Surface Water Classification List (Tables A & B)
▪    Implementation Guidance for Ambient Water Quality Criteria for Bacteria Download here
▪    Ambient Water Quality Criteria for Bacteria - 1986 Download here
▪   Water Quality Standards for Salinity, Colorado River System - 2005 Review, Download here
▪     Link to: U.S. EPA Water Quality Standards Website

Nutrient Criteria Plan

▪ Wyoming plan to develop numeric nutrient criteria. Download pdf format.

Use Attainability Analyses (UAAs)

Surface water classifications and site specific criteria are revised in Wyoming on an ongoing basis. Many of these modifications are based upon structured studies called Use Attainability Analyses. The table that follow shows the status of any required administrative action for each UAA conducted in Wyoming beginning in July 2001. Associated documents can be viewed or downloaded by selecting the appropriate links.

UAA	Proposed Change	Public Notice	WQD Action	EQC Action	EPA Action	Status
Sand Creek (near Lysite Big Horn River Basin) 29MB	Classification 3B to 4B	11/27/2001 Comments	Approved 3/27/02	N/A	Approved 6/11/2002	Final
Isolated Waters (Statewide-Categorical)	Classification 4C	12/7/2001 Comments	Approved 4/22/02	Pending Appeal	N/A	Pending
Coal Draw (near Thermopolis), Big Horn Basin	Classification 3B to 4B (upper reaches) 4C (lower reaches)	9/6/02 Comments	Approved 12/5/02	N/A	Disapproved 3/5/03	Pending
Red Creek, Great Divide Basin	Classification 3B to 4B	9/6/02 Comments	Approved 11/7/02	N/A	Approved 5/8/03	Final
Whitetail Creek, Little Powder Basin	Classification 3B to 4B	12/6/02 Comments	Approved 08/6/03	N/A	Disapproved 02/24/05	Final
Unnamed Trib to Whitetail Cr, Little Powder Basin	Classification 3B to 4C	12/6/02 Comments	Approved 08/6/03	N/A	Disapproved 02/24/05	Final
Gooseberry Cr, Bighorn Basin	Classification 2AB to 2B (upper reaches) 2C (lower reaches)	1/15/03 Comments	Approved 08/6/03	N/A	Approved 12/5/03	Final
Rawhide Cr, Bighorn Basin	Classification 2AB to 2B (upper reaches) 2C (lower reaches)	1/15/03 Comments	Approved 08/6/03	N/A	Approved 12/5/03	Final
Porter Draw, South Platte Basin	Classification 3B to 4C	11/17/03	Withdrawn	N/A	N/A	N/A
Wallace Creek, Powder River Basin	Classification 3B to 4B	11/17/03 Comments	Approved 05/24/04 Revised 01/26/05	N/A		Final
Caballo Creek Belle Fourche Basin	Classification 3B to 2ABww	02/25/04 Comments	Approved 05/24/04	N/A		Final
Unnamed Trib to Foster Reservoir Bighorn Basin	Classification 3B to 4B	03/9/04 Comments	Approved 05/22/04	N/A		Final
Unnamed Drainage to Sevenmile Creek North Platte River Basin	Classification 3B to 4C	07/12/04	Approved 08/10/04	N/A		Final
Robinson Creek Belle Fourche Basin	Classification 3B to 4C	8/6/04 Comments	Approved 09/27/04	N/A		Final
Anderson Draw Powder River Basin	Classification 3B to 4B and 4C	8/6/04 Comments	Approved 09/27/04	N/A		Final
Van Houten Dr. Powder River Basin	Classification 3B to 4B and 4C	8/6/04 Comments	Approved 09/27/04	N/A		Final
Schoonover Road Area Powder River Basin	Classification 3B to 4B	8/6/04 Comments	Approved 09/27/04	N/A		Final
Canals & Ditches Categorical Statewide	Classification 4A	9/1/04 Comments	Approved 01/03/05	N/A
Kennedy North Area Powder River Basin	Classification 3B to 4B	10/22/04 Comments	Approved 12/27/04	N/A
Kennedy South Area Powder River Basin	Classification 3B to 4B and 4C	10/22/04 Comments	Approved 12/27/04	Partial Approval 10/29/07
Cottonwood Creek Big Horn Basin	Criteria Chloride & Selenium	12/6/06	N/A	Approved 4/25/07		Final
Salt Creek Powder River Basin	Criteria Chloride	12/6/06	N/A	Approved 4/25/07		Final
Poison Spider Creek North Platte River Basin	Criteria Chloride	12/6/06	N/A	Approved 4/25/07		Final
Unnamed Trib to Black Thunder Cr. Cheyenne River Basin	Classification 3B to 4B	01/10/05 Comments	Approved 3/22/05	N/A	Disapproved 09/14/06	Final
Unnamed Trib to Poison Spider Cr. North Platte Basin	Classification 3B to 4B	04/25/05 Comments	Approved 11/18/05	N/A	Disapproved 09/14/06	Final
Unnamed, Isolated Wetland near Lamont, WY Great Divide Basin	Classification 3B to 4B	04/25/05 Comments	Approved 11/18/05	N/A	N/A	Final
Three Unnamed Tributaries of Dead Horse Creek in the Powder River Basin	Classification 3B to 4B	6/22/05 Comments	Approved 11/18/05	N/A	Approved 09/14/06	Final
Unnamed Trib to Lodgepole Creek in the Cheyenne River Basin	Classification 3B to 4B	9/12/05 Comments	Approved 11/18/05	N/A	Approved 09/14/06	Final
Three Tributaries to Crazy Woman Creek in the Powder River Basin	Classification 3B to 4B	11/16/05 Comments	Approved 2/6/2006	Pending Appeal	Approved 09/14/06	Under Appeal
Willow Springs Draw in the Big Horn River Basin	Classification 3B to 4B	8/11/06 Comments	Approved 9/26/2006

Last Update: September 24, 2008