How many wastewater permits expire in Wyoming in 2028?

6 NPDES permits held by publicly owned wastewater treatment plants in Wyoming expire in 2028, covering a combined average flow of 10 MGD. The busiest month is Nov 2028 with 2 expiries.

What happens when an NPDES permit expires?

The plant must have applied for renewal at least 180 days before the expiry date. If the agency has not reissued the permit by then, the old permit is administratively continued and stays enforceable. The reissued permit typically carries updated effluent limits based on the latest water-quality standards, which is what drives upgrade projects.

Which is the largest plant with a permit expiring in Wyoming in 2028?

Dry Creek Water Reclamation Facility in Cheyenne, treating about 5.48 MGD under permit WY0022934, expiring Oct 2028.

How do I get contacts for the plants on this list?

Every plant links to its profile with flow, permit and compliance data. Treatment technology and verified decision-maker contacts for each plant, and the same list for every state and year, are available in Klarifi with a free account.

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Wyoming wastewater permits expiring in 2028

Name: Wyoming NPDES permits expiring in 2028
Creator: Klarifi
License: https://klarifi.io/terms-of-service

6 NPDES permits · 10 MGD combined average flow

6 publicly owned wastewater treatment plants in Wyoming hold NPDES permits that expire during 2028, issued by Wyoming Department of Environmental Quality. The table lists each plant with its permit number, expiry month, average flow, treatment technology and three-year violation count, in order of expiry.

An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.

Other years:

2026 (6)2027 (8)All Wyoming NPDES permits →

Publicly owned wastewater treatment plants in Wyoming with NPDES permits expiring in 2028, from EPA ICIS-NPDES records. Refreshed on every release.
Facility	City	Avg flow (MGD)	NPDES permit	Expires	Violations (3y)
Big Piney Wastewater Lagoon	Big Piney	0.1	WY0020133	Mar 2028	13
Powell, City Of	Powell	1.67	WY0020648	Apr 2028	7
Kemmerer Wastewater Treatment	Kemmerer	0.24	WY0020320	Aug 2028	43
Dry Creek Water Reclamation Facility	Cheyenne	5.48	WY0022934	Oct 2028	1
Sheridan Wastewater Treatment	Sheridan	2.11	WY0020010	Nov 2028	1
Hudson Wastewater Lagoon	Hudson	0.22	WY0020664	Nov 2028	6

Wyoming permit renewals in 2028: questions

Sources and methodology

Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.

Data refreshed October 26, 2026.

Wastewater terms: NPDES permit · POTW · Biological nutrient removal · Tertiary treatment · Ozonation · Activated sludge · all terms

Cite this page

Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.

Klarifi. “NPDES permits expiring in 2028: Wyoming wastewater plants.” Updated October 26, 2026. https://klarifi.io/facilities/wyoming/permits-expiring/2028

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