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Water Supply — NPDES discharge permits in Wyoming

Of the 5 permits in EPA's SIC 4941 in WY, 1 went over a limit between 2025-10-01 and 2026-09-30 (Solids, total suspended: 1). 1 is past the expiry date EPA's file holds; 1 has a renewal application overdue or due within 18 months. EPA's file of 2026-10-15.

FacilityLast 12 monthsPermit
Cheyenne Board of Public Utilities
WY0031721 · Water Supply
Over a limit 7×: Solids, total suspended (7×)Expires Jun 30, 2030
Central Wyoming Regional Water System
WY0097018 · Water Supply
No value over a limitExpires Feb 28, 2029
Encampment, Town of
WY0035980 · Water Supply
No value over a limitExpires Mar 31, 2030
Kemmerer-Diamondville Joint Powers Board
WY0000116 · Water Supply
No value over a limitRenewal application overdue
Sheridan, City of
WY0001392 · Water Supply
No value over a limitPermit past the expiry date EPA's file holds

The record is EPA's ICIS-NPDES file of 2026-10-15: values filed against each limit between Oct 1, 2025 and Sep 30, 2026. No reports on file may be EPA's gap, not the facility's.

For programs and AI agents: this screen as JSON at /api/v1/permits?state=WY&sic=4941, narrowed with &over_limit=true, &parameter=phosphorus or &renewal=due; or add https://passage-data.com/mcp as a remote MCP server (tool list_permits). Free, no key. llms.txt

From EPA's ECHO data, not the permit document itself: your permit is the final word. All states