Cheyenne, WY Environmental Rules: Stormwater Management (2026)
Key Facts
- Enforcing office
- City engineer
- Max fine per violation
- $10,000
- Governing law
- Ch. 13.28, adopted 2022
- Permit tie-in
- WYPDES construction/industrial permits required
Summary
Cheyenne bans dumping anything but rain into the storm drain system, and the city engineer enforces it under the Urban Stormwater Quality Management ordinance.
No person shall discharge or cause to be discharged into the municipal storm drain system or watercourses any materials, including, but not limited to, pollutants or waters containing any pollutants that cause or contribute to a violation of Wyoming Water Quality Standards, other than stormwater.
The commencement, conduct or continuance of any illegal discharge to the storm drain system is prohibited except as described as follows:
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 73).
Full Breakdown
Under Chapter 13.28, no one may discharge or cause to be discharged into Cheyenne's municipal storm drain system or watercourses any materials or pollutants beyond stormwater itself. The city engineer administers the chapter, can order written notices to eliminate illicit connections or illegal discharges, and requires industrial and construction sites to comply with their WYPDES stormwater permits.
Violations & Fines
Ignoring a city engineer notice to eliminate an illegal discharge, illicit connection, or stormwater pollution source draws a fine up to $10,000 per Section 13.28.140/13.28.220.
Frequently Asked Questions
Can I wash my car in the driveway in Cheyenne?
What happens if I don't fix an illicit storm drain connection?
Sources & Official References
Other rules in Cheyenne
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