EPA Air · stack tests by state and year
Air-emissions stack tests in Alaska, 2025
- 152Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Alaska during 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Alaska, 2025
- Fairbanks North Star County 56
- Kenai Peninsula County 33
- North Slope County 21
- Anchorage Municipality County 17
- Southeast Fairbanks (CA) County 6
- Denali County 6
- Northwest Arctic County 4
- Valdez-Cordova (CA) County 4
- Aleutians West (CA) County 3
Alaska, other years
Air-emissions stack tests recorded in Alaska, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-12-13 | HILCORP ALASKA, LLC / PRUDHOE SEAWATER TREATMENT PLANT | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2025-12-13 | HILCORP ALASKA, LLC / PRUDHOE SEAWATER TREATMENT PLANT | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2025-12-13 | HILCORP ALASKA, LLC / PRUDHOE SEAWATER TREATMENT PLANT | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2025-12-13 | HILCORP ALASKA, LLC / PRUDHOE SEAWATER TREATMENT PLANT | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2025-12-05 | HILCORP ALASKA, LLC / BELUGA RIVER UNIT — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-12-05 | HILCORP ALASKA, LLC / BELUGA RIVER UNIT — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-12-05 | HILCORP ALASKA, LLC / BELUGA RIVER UNIT — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-12-02 | HILCORP ALASKA, LLC / TYONEK PLATFORM | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-11-18 | HILCORP ALASKA, LLC / BEAVER CREEK PRODUCTION FACILITY | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-11-06 | TESORO ALASKA COMPANY, LLC / KENAI REFINERY — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-11-06 | TESORO ALASKA COMPANY, LLC / KENAI REFINERY — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-10-22 | AURORA ENERGY LLC / CHENA POWER PLANT — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-10-22 | AURORA ENERGY LLC / CHENA POWER PLANT — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-10-22 | AURORA ENERGY LLC / CHENA POWER PLANT — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-10-22 | AURORA ENERGY LLC / CHENA POWER PLANT — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-10-22 | AURORA ENERGY LLC / CHENA POWER PLANT — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-10-22 | AURORA ENERGY LLC / CHENA POWER PLANT — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-10-22 | AURORA ENERGY LLC / CHENA POWER PLANT — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-10-22 | AURORA ENERGY LLC / CHENA POWER PLANT — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-10-21 | AURORA ENERGY LLC / CHENA POWER PLANT — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-10-21 | HILCORP ALASKA, LLC / GATHERING CENTER #2 (GC 2) | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2025-10-21 | HILCORP ALASKA, LLC / GATHERING CENTER #2 (GC 2) | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2025-10-19 | HILCORP ALASKA, LLC / MILNE POINT PRODUCTION FACILITY (MPU) | NORTH SLOPE BOROUGH, North Slope, AK | Fail | State |
| 2025-10-16 | DOYON UTILITIES, LLC / FORT WAINWRIGHT (PRIVATIZED EMISSION UN | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-10-16 | DOYON UTILITIES, LLC / FORT WAINWRIGHT (PRIVATIZED EMISSION UN | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-10-07 | GOLDEN VALLEY ELECTRIC ASSOCIATION / HEALY POWER PLANT — high-priority violation on file | HEALY, Denali, AK | Pass | State |
| 2025-10-02 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-10-02 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-09-29 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-09-23 | COLASKA INC, DBA SECON / SECON AESCO ASPHALT PLANT | ALASKA, Undetermined, AK | Pass | State |
| 2025-09-17 | GOLDEN VALLEY ELECTRIC ASSOCIATION / ZEHNDER FACILITY | FAIRBANKS, Fairbanks North Star, AK | Fail | State |
| 2025-09-17 | GOLDEN VALLEY ELECTRIC ASSOCIATION / NORTH POLE POWER PLANT | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-09-17 | GOLDEN VALLEY ELECTRIC ASSOCIATION / NORTH POLE POWER PLANT | FAIRBANKS, Fairbanks North Star, AK | Fail | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-09-11 | UNIVERSITY OF ALASKA / UNIVERSITY OF ALASKA FAIRBANKS CAMPUS — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-09-05 | HILCORP ALASKA, LLC / CENTRAL GAS FACILITY (CGF) — high-priority violation on file | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2025-08-27 | FAIRBANKS GOLD MINING INC / FORT KNOX MINE | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-08-27 | FAIRBANKS GOLD MINING INC / FORT KNOX MINE | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-08-27 | FAIRBANKS GOLD MINING INC / FORT KNOX MINE | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-08-27 | FAIRBANKS GOLD MINING INC / FORT KNOX MINE | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-08-27 | FAIRBANKS GOLD MINING INC / FORT KNOX MINE | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-08-27 | FAIRBANKS GOLD MINING INC / FORT KNOX MINE | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-08-27 | FAIRBANKS GOLD MINING INC / FORT KNOX MINE | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-08-24 | TECK ALASKA, INC. (TECK) / RED DOG MINE — high-priority violation on file | KOTZEBUE, Northwest Arctic, AK | Pass | State |
| 2025-08-24 | TECK ALASKA, INC. (TECK) / RED DOG MINE — high-priority violation on file | KOTZEBUE, Northwest Arctic, AK | Pass | State |
| 2025-08-24 | TECK ALASKA, INC. (TECK) / RED DOG MINE — high-priority violation on file | KOTZEBUE, Northwest Arctic, AK | Pass | State |
| 2025-08-20 | HILCORP ALASKA, LLC / MILNE POINT L-PAD | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2025-08-07 | HILCORP ALASKA, LLC / DOLLY VARDEN PLATFORM — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-08-05 | HILCORP ALASKA, LLC / GRANITE POINT PLATFORM | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-08-01 | HC CONTRACTORS, LLC / CMI PVM-9X ASPHALT PLANT | DELTA JUNCTION, Southeast Fairbanks (CA), AK | Pass | State |
| 2025-07-30 | US AIR FORCE (EIELSON) / EIELSON AIR FORCE BASE — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-07-30 | US AIR FORCE (EIELSON) / EIELSON AIR FORCE BASE — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-07-30 | US AIR FORCE (EIELSON) / EIELSON AIR FORCE BASE — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | N/A | State |
| 2025-07-30 | US AIR FORCE (EIELSON) / EIELSON AIR FORCE BASE — high-priority violation on file | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-07-30 | PETRO STAR, INC. / NORTH POLE REFINERY | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-07-30 | PETRO STAR, INC. / NORTH POLE REFINERY | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-07-30 | GOLDEN VALLEY ELECTRIC ASSOCIATION / NORTH POLE POWER PLANT | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-07-30 | GOLDEN VALLEY ELECTRIC ASSOCIATION / NORTH POLE POWER PLANT | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-07-22 | GOLDEN VALLEY ELECTRIC ASSOCIATION / HEALY POWER PLANT — high-priority violation on file | HEALY, Denali, AK | Pass | State |
| 2025-07-20 | CHUGACH ELECTRIC ASSOCIATION / INTERNATIONAL STATION POWER PLANT | ANCHORAGE, Anchorage Municipality, AK | Pass | State |
| 2025-07-20 | CHUGACH ELECTRIC ASSOCIATION / INTERNATIONAL STATION POWER PLANT | ANCHORAGE, Anchorage Municipality, AK | Pass | State |
| 2025-07-20 | CHUGACH ELECTRIC ASSOCIATION / INTERNATIONAL STATION POWER PLANT | ANCHORAGE, Anchorage Municipality, AK | Pass | State |
| 2025-07-18 | GOLDEN VALLEY ELECTRIC ASSOCIATION / HEALY POWER PLANT — high-priority violation on file | HEALY, Denali, AK | Pass | State |
| 2025-07-16 | CHUGACH ELECTRIC ASSOCIATION / HANK NIKKELS PLANT ONE | ANCHORAGE, Anchorage Municipality, AK | Pass | State |
| 2025-07-10 | CHUGACH ELECTRIC ASSOCIATION / INTERNATIONAL STATION POWER PLANT | ANCHORAGE, Anchorage Municipality, AK | Pass | State |
| 2025-07-10 | CHUGACH ELECTRIC ASSOCIATION / INTERNATIONAL STATION POWER PLANT | ANCHORAGE, Anchorage Municipality, AK | Pass | State |
| 2025-07-10 | CHUGACH ELECTRIC ASSOCIATION / INTERNATIONAL STATION POWER PLANT | ANCHORAGE, Anchorage Municipality, AK | Pass | State |
| 2025-07-10 | CHUGACH ELECTRIC ASSOCIATION / INTERNATIONAL STATION POWER PLANT | ANCHORAGE, Anchorage Municipality, AK | Pass | State |
| 2025-07-09 | MATANUSKA ELECTRIC ASSOCIATION, INC / EKLUTNA GENERATION STATION | ANCHORAGE, Anchorage Municipality, AK | Pass | State |
| 2025-07-09 | MATANUSKA ELECTRIC ASSOCIATION, INC / EKLUTNA GENERATION STATION | ANCHORAGE, Anchorage Municipality, AK | Pass | State |
| 2025-06-28 | HILCORP ALASKA, LLC / BELUGA RIVER UNIT — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-06-28 | HILCORP ALASKA, LLC / BELUGA RIVER UNIT — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-06-28 | HILCORP ALASKA, LLC / BELUGA RIVER UNIT — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-06-28 | HILCORP ALASKA, LLC / BELUGA RIVER UNIT — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-06-28 | HILCORP ALASKA, LLC / BELUGA RIVER UNIT — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-06-28 | HILCORP ALASKA, LLC / BELUGA RIVER UNIT — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-06-28 | HILCORP ALASKA, LLC / BELUGA RIVER UNIT — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2025-06-27 | PETRO STAR, INC. / PETRO STAR VALDEZ REFINERY — high-priority violation on file | VALDEZ, Valdez-Cordova (CA), AK | Pass | State |
| 2025-06-27 | PETRO STAR, INC. / PETRO STAR VALDEZ REFINERY — high-priority violation on file | VALDEZ, Valdez-Cordova (CA), AK | Pass | State |
| 2025-06-27 | PETRO STAR, INC. / PETRO STAR VALDEZ REFINERY — high-priority violation on file | VALDEZ, Valdez-Cordova (CA), AK | Pass | State |
| 2025-06-26 | PETRO STAR, INC. / PETRO STAR VALDEZ REFINERY — high-priority violation on file | VALDEZ, Valdez-Cordova (CA), AK | Pass | State |
| 2025-06-22 | US ECOLOGY ALASKA LLC (FORMERLY NRC AL / MOOSE CREEK FACILITY | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2025-06-15 | NORTHERN STAR (POGO) LLC / POGO MINE | DELTA JUNCTION, Southeast Fairbanks (CA), AK | N/A | State |
| 2025-06-15 | NORTHERN STAR (POGO) LLC / POGO MINE | DELTA JUNCTION, Southeast Fairbanks (CA), AK | Pass | State |
| 2025-06-15 | NORTHERN STAR (POGO) LLC / POGO MINE | DELTA JUNCTION, Southeast Fairbanks (CA), AK | N/A | State |
| 2025-06-15 | NORTHERN STAR (POGO) LLC / POGO MINE | DELTA JUNCTION, Southeast Fairbanks (CA), AK | N/A | State |
Page 1 of 2NextPage 2
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.