EPA Air · stack tests by county and year
Air-emissions stack tests in North Slope County, Alaska, 2026
- 8Stack 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 North Slope County, Alaska 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 North Slope County facility page.
North Slope County, Alaska, 2026
Air-emissions stack tests in North Slope County, other years
Air-emissions stack tests recorded in North Slope County, Alaska, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-05-04 | HILCORP ALASKA, LLC / OOOGURUK DEVELOPMENT PROJECT | Pass | State |
| 2026-04-08 | CONOCOPHILLIPS ALASKA, INC. / ALPINE CENTRAL PROCESSING FACILITY | Pass | State |
| 2026-04-07 | CONOCOPHILLIPS ALASKA, INC. / ALPINE CENTRAL PROCESSING FACILITY | Pass | State |
| 2026-03-12 | HILCORP ALASKA, LLC / LISBURNE PRODUCTION CENTER (LPC) | Pass | State |
| 2026-03-10 | HILCORP ALASKA, LLC / NIKAITCHUQ DEVELOPMENT | Fail | State |
| 2026-03-09 | HILCORP ALASKA, LLC / NIKAITCHUQ DEVELOPMENT | Pass | State |
| 2026-01-23 | TDX POWER, LLC / TNSG NORTH POWER PLANT — high-priority violation on file | Pass | State |
| 2026-01-22 | HARVEST ALASKA LNG, LLC / LIQUEFIED NATURAL GAS (LNG) FACILITY PR | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.