EPA Air · stack tests by county and year

Air-emissions stack tests in Platte County, Wyoming, 2026

10Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Platte County, Wyoming during 2026. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Platte County facility page.

Air-emissions stack tests in Platte County, other years

Air-emissions stack tests recorded in Platte County, Wyoming, 2026

Date	Facility	Kind	Agency
2026-07-09	LARAMIE RIVER STATION (BASIN ELECTRIC POWER COOPERATIVE) — high-priority violation on file	Pass	State
2026-07-09	LARAMIE RIVER STATION (BASIN ELECTRIC POWER COOPERATIVE) — high-priority violation on file	Pass	State
2026-07-07	LARAMIE RIVER STATION (BASIN ELECTRIC POWER COOPERATIVE) — high-priority violation on file	Pass	State
2026-07-07	LARAMIE RIVER STATION (BASIN ELECTRIC POWER COOPERATIVE) — high-priority violation on file	Pass	State
2026-07-07	LARAMIE RIVER STATION (BASIN ELECTRIC POWER COOPERATIVE) — high-priority violation on file	Pass	State
2026-03-31	LARAMIE RIVER STATION (BASIN ELECTRIC POWER COOPERATIVE) — high-priority violation on file	Pass	State
2026-03-11	LARAMIE RIVER STATION (BASIN ELECTRIC POWER COOPERATIVE) — high-priority violation on file	Pass	State
2026-03-11	LARAMIE RIVER STATION (BASIN ELECTRIC POWER COOPERATIVE) — high-priority violation on file	Pass	State
2026-03-11	LARAMIE RIVER STATION (BASIN ELECTRIC POWER COOPERATIVE) — high-priority violation on file	Pass	State
2026-03-11	LARAMIE RIVER STATION (BASIN ELECTRIC POWER COOPERATIVE) — high-priority violation on file	Pass	State

Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.

What this page shows

This page covers Clean Air Act facilities in the EPA air register for Platte county, WY, in 2026. It lists 5 stack tests recorded in 2026.