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 |
|---|---|---|---|
| 2025-07-16 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-07-16 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-07-16 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-07-16 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-07-16 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-07-10 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-10 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-10 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-10 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-10 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-10 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-10 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-10 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | Pass | State |
| 2025-07-10 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-07-10 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-06-26 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-06-26 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-06-26 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-06-26 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | Pass | State |
| 2025-06-25 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-25 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-25 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-25 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-25 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-25 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-25 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-25 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-25 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-25 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-24 | HANSEN LAKE COMPRESSOR STATION (WILLIAMS FIELD SERVICES CO.) | Pass | State |
| 2025-06-23 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-06-23 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-06-23 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-06-23 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-06-16 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
| 2025-06-16 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
| 2025-06-13 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-06-13 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-06-13 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-06-13 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-06-13 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-06-13 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-06-13 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-06-13 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-06-12 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-06-12 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-06-12 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-06-10 | GRANGER SODA ASH FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-06-09 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | Pass | State |
| 2025-05-15 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
| 2025-05-15 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
| 2025-05-15 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
| 2025-05-15 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
| 2025-05-13 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
| 2025-05-13 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
| 2025-05-12 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
| 2025-05-12 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
| 2025-05-08 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-05-07 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-05-06 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | Pass | State |
| 2025-05-06 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-05-06 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-04-23 | FONTENELLE STATION (MOUNTAIN GAS RESOURCES LLC) | Pass | State |
| 2025-04-23 | FONTENELLE STATION (MOUNTAIN GAS RESOURCES LLC) | Pass | State |
| 2025-04-23 | FONTENELLE STATION (MOUNTAIN GAS RESOURCES LLC) | Pass | State |
| 2025-04-23 | FONTENELLE STATION (MOUNTAIN GAS RESOURCES LLC) | Pass | State |
| 2025-04-21 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-04-21 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-04-21 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-04-17 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-04-17 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-04-15 | WESTVACO FACILITY (WE SODA WYOMING LP) | Pass | State |
| 2025-04-10 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-04-10 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-04-10 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-04-10 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-04-10 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-04-10 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | Pass | State |
| 2025-04-08 | JIM BRIDGER PLANT (PACIFICORP) — high-priority violation on file | Pass | State |
| 2025-04-08 | JIM BRIDGER PLANT (PACIFICORP) — high-priority violation on file | Pass | State |
| 2025-04-01 | CHAIN LAKES I5 35 4H-8H PAD (CROWHEART ENERGY, LLC) | Pass | State |
| 2025-04-01 | CHAIN LAKES I5 35 4H-8H PAD (CROWHEART ENERGY, LLC) | Pass | State |
| 2025-04-01 | CHAIN LAKES I5 35 4H-8H PAD (CROWHEART ENERGY, LLC) | Pass | State |
| 2025-03-26 | ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.