EPA Air · stack tests by county and year
Air-emissions stack tests in Williams County, North Dakota, 2026
- 5Stack 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 Williams County, North Dakota 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 Williams County facility page.
Williams County, North Dakota, 2026
Air-emissions stack tests in Williams County, other years
Air-emissions stack tests recorded in Williams County, North Dakota, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-04-30 | 1804 LTD. LLC - SPRINGBROOK GAS PLANT - AQ | Pass | State |
| 2026-04-29 | 1804 LTD. LLC - SPRINGBROOK GAS PLANT - AQ | Pass | State |
| 2026-04-21 | HILAND PARTNERS HOLDINGS LLC - EPPING COMPRESSOR STATION | Pass | State |
| 2026-04-09 | HILAND PARTNERS HOLDINGS LLC - STONY CREEK COMPRESSOR STATION | Pass | State |
| 2026-03-04 | HESS TIOGA GAS PLANT LLC - TIOGA GAS PLANT - AQ | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.