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.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in Williams county, ND, in 2026. Stack tests recorded in 2026: 5.