EPA Air · stack tests by county and year
Air-emissions stack tests in Undetermined County, North Dakota, 2025
- 7Stack 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 Undetermined County, North Dakota 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 Undetermined County facility page.
Air-emissions stack tests in Undetermined County, other years
Air-emissions stack tests recorded in Undetermined County, North Dakota, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-10-03 | ARROW PIPELINE STATION #3 | Pass | U.S. EPA |
| 2025-10-03 | ARROW PIPELINE STATION #3 | Pass | U.S. EPA |
| 2025-10-02 | ARROW PIPELINE STATION #4 | Pass | U.S. EPA |
| 2025-10-02 | ARROW PIPELINE STATION #4 | Pass | U.S. EPA |
| 2025-09-29 | ARROW PIPELINE STATION #4 | Pass | U.S. EPA |
| 2025-06-04 | ARROW PIPELINE STATION #4 | Pass | U.S. EPA |
| 2025-06-03 | ARROW PIPELINE STATION #3 | Pass | U.S. EPA |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.