EPA Air · stack tests by county and year
Air-emissions stack tests in Sweetwater County, Wyoming, 2025
- 228Stack 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 Sweetwater County, Wyoming during 2025. 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 Sweetwater County facility page.
Sweetwater County, Wyoming, 2025
- Inspections 16
Air-emissions stack tests in Sweetwater County, other years
Air-emissions stack tests recorded in Sweetwater County, Wyoming, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-18 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-12-16 | CHAIN LAKES I5 35 4H-8H PAD (CROWHEART ENERGY, LLC) | Pass | State |
| 2025-12-16 | CHAIN LAKES I5 35 4H-8H PAD (CROWHEART ENERGY, LLC) | Pass | State |
| 2025-12-16 | CHAIN LAKES I5 35 4H-8H PAD (CROWHEART ENERGY, LLC) | Pass | State |
| 2025-12-15 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-12-15 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-12-15 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-12-09 | FONTENELLE STATION (MOUNTAIN GAS RESOURCES LLC) | Pass | State |
| 2025-12-09 | FONTENELLE STATION (MOUNTAIN GAS RESOURCES LLC) | Pass | State |
| 2025-12-09 | FONTENELLE STATION (MOUNTAIN GAS RESOURCES LLC) | Pass | State |
| 2025-12-02 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-12-02 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-11-12 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-11-12 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-11-12 | WAMSUTTER COMPRESSOR STATION (COLORADO INTERSTATE GAS) | Pass | State |
| 2025-11-12 | WAMSUTTER COMPRESSOR STATION (COLORADO INTERSTATE GAS) | Pass | State |
| 2025-11-12 | WAMSUTTER COMPRESSOR STATION (COLORADO INTERSTATE GAS) | Pass | State |
| 2025-11-11 | WAMSUTTER COMPRESSOR STATION (COLORADO INTERSTATE GAS) | Pass | State |
| 2025-11-11 | WAMSUTTER COMPRESSOR STATION (COLORADO INTERSTATE GAS) | Pass | State |
| 2025-11-11 | WAMSUTTER COMPRESSOR STATION (COLORADO INTERSTATE GAS) | Pass | State |
| 2025-11-11 | WAMSUTTER COMPRESSOR STATION (COLORADO INTERSTATE GAS) | Pass | State |
| 2025-11-10 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-11-10 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-10-08 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-10-08 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-10-08 | JIM BRIDGER PLANT (PACIFICORP) — high-priority violation on file | Pass | State |
| 2025-10-08 | JIM BRIDGER PLANT (PACIFICORP) — high-priority violation on file | Pass | State |
| 2025-10-01 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-10-01 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-09-30 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-09-29 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-09-25 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-09-25 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-09-24 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-09-23 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-09-17 | FREWEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES) | Pass | State |
| 2025-09-17 | FREWEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES) | Pass | State |
| 2025-09-09 | RINER STATION (SOUTHERN STAR CENTRAL GAS PIPELINE) | Pass | State |
| 2025-09-09 | RINER STATION (SOUTHERN STAR CENTRAL GAS PIPELINE) | Pass | State |
| 2025-08-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-28 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-21 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-08-21 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-08-20 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-20 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-20 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-20 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-08-14 | FONTENELLE STATION (MOUNTAIN GAS RESOURCES LLC) | Pass | State |
| 2025-08-14 | FONTENELLE STATION (MOUNTAIN GAS RESOURCES LLC) | Pass | State |
| 2025-08-14 | FONTENELLE STATION (MOUNTAIN GAS RESOURCES LLC) | Pass | State |
| 2025-08-08 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-07-31 | GRANGER SODA ASH FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-07-30 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-30 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-30 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-30 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-30 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-30 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-30 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-30 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-07-30 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-07-30 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-07-30 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-07-30 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-07-29 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-07-29 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-07-29 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-07-29 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-07-29 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-07-16 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
Page 1 of 3NextPage 2
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.