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 |
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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 AK for 2025. The page lists 152 stack tests recorded in 2025.