Wyoming Criteria Development Progress
This page provides information about the progress Wyoming has made towards the development of numeric criteria and shows what statewide and site-specific criteria are currently in effect.
Note: The information on the tabs below reflects the information available on EPA’s
Water Quality Standards Repository. The criteria presented here will be updated as new water quality standards documents are posted to the Repository.
Numeric Criteria Development
The information presented below gives a summary of state progress towards the development of numeric criteria. The information comes from EPA’s “State Adoption of Numeric Nutrient Standards (1998-2008)” report, current water quality standards, program activity measures, and nutrient criteria development plans. Links to the Wyoming Nutrient Criteria Plan and state water quality standards are also provided.
Existing Numeric Criteria
| Waterbody Type | N | P | Chl-a | Clarity |
|---|---|---|---|---|
| Lakes and Reservoirs | ||||
| Rivers and Streams | ||||
| Estuaries | N ⁄ A | N ⁄ A | N ⁄ A | N ⁄ A |
| Wetlands |
S = Statewide W = For selected waterbody N ⁄ A=Not Applicable
Note: See Statewide Criteria and Site-specific Criteria tabs for more information.
Links to Numeric Nutrient Criteria Plan and Existing Nutrient Criteria
Plan:
WQS: Wyoming Water Quality Standards
Wyoming DEQ: Surface Water Standards Exit
Milestone Information - Development of Statewide Numeric N/P Criteria
Milestone information updated July 2012.
Milestone |
Rivers and Streams | Lakes and Reservoirs | Estuaries and Coastal Waters | |||
|---|---|---|---|---|---|---|
| TN | TP | TN | TP | TN | TP | |
| Planning for criteria development | No date provided | No date provided | No date provided | No date provided | Not applicable | Not applicable |
| Collection of information and data | No date provided | No date provided | No date provided | No date provided | Not applicable | Not applicable |
| Analysis of information and data | No date provided | No date provided | No date provided | No date provided | Not applicable | Not applicable |
| Proposal of criteria | No date provided | No date provided | No date provided | No date provided | Not applicable | Not applicable |
| Adoption of criteria (EPA-Approved) | No date provided | No date provided | No date provided | No date provided | Not applicable | Not applicable |
TN: Total Nitrogen; TP: Total Phosphorus
Statewide Criteria
The information on this tab shows EPA-approved nutrient criteria for Wyoming’s waterbodies. The language presented below comes directly from state water quality standards and applies to all waterbodies within the state (unless a waterbody type or designated use is noted). Criteria applicable to specific waterbodies within the state can be found on the “Site-specific Criteria” tab. For more information, refer to the Wyoming water quality standards.
The following information reflects Wyoming’s water quality standards posted to the Water Quality Standards Repository as of November 2010 (EPA-approved January 2002).
Section 17. Taste, Odor and Color.
No Class 1, 2, or 3 waters shall contain substances attributable to or influenced by the activities of man that produce taste, odor and color or that would:
(a) Of themselves or in combination, impart an unpalatable or off-flavor in fish flesh;
(b) Visibly alter the natural color of the water or impart color to skin, clothing, vessels or structures;
(c) Produce detectable odor; or
(d) Directly or through interaction among themselves, or with chemicals used in existing water treatment processes, result in concentrations that will impart undesirable taste or odor to public water supplies.
Appendix B – Non-priority pollutants
Nitrates (as N) – Human Health Value* 10000 ug/L
*Based on two routes of exposure – Ingestion of contaminated aquatic organisms and drinking water.
Site-specific Criteria
The information on this tab shows EPA-approved site-specific nutrient criteria for Wyoming’s waterbodies. Criteria on this page apply only to the waterbodies listed below. Criteria applicable to all waterbodies within the state are found on the “Statewide Criteria” tab. For more information, refer to the Wyoming water quality standards.
The following information reflects Wyoming’s water quality standards posted to the Water Quality Standards Repository as of November 2010 (EPA-approved January 2002).
None.