Wyoming Stormwater-General regulations & environmental compliance analysis

Wyoming Stormwater-General: What you need to know

Governing Law and Regulations

National pollutant discharge elimination system (NPDES) permit program: Wyoming Water Quality Rules and Regulations (WWQR&R) Chapter 2, Sections 1 to 19

Regulatory Agency
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Wyoming Department of Environmental Quality (DEQ) Water Quality Division (WQD)

U.S. Environmental Protection Agency (EPA) Region 8

See ADDRESSES & CONTACTS for addresses and telephone numbers.

Comparison: State vs. Federal

· Rules. Wyoming is authorized to administer the federal National Pollutant Discharge Elimination System (NPDES) program for stormwater discharges. The state issues individual permits and general permits for discharges associated with industrial facilities, construction activities, mineral mining, and municipal separate storm sewer systems (MS4s). The NPDES program is known as the Wyoming Pollution Discharge Elimination System (WYPDES) in the state.

Wyoming rules are more stringent because some types of general permits are not available where stormwater has a potential to discharge to Class 1 waters. In these areas the facility may apply for an individual stormwater permit. Wyoming also charges stormwater permit fees.

See the national section STORMWATER—GENERAL for more information on the federal program, and the state sections STORMWATER—INDUSTRIAL FACILITIES, STORMWATER—CONSTRUCTION ACTIVITIES and STORMWATER—MUNICIPALITIES for information on the state requirements for these specific types of stormwater discharges.

· Administration and enforcement. The DEQ administers and enforces the stormwater program in Wyoming.

State Requirements


Companies that have a construction, industrial, or mining site with an excellent stormwater quality management program may qualify for the DEQ’s Storm ...

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