EPA Air · stack tests by state and year
Air-emissions stack tests in California, 2025
- 5,390Stack 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 California 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 California, 2025
- Kern County 3,380
- Stanislaus County 579
- San Joaquin County 413
- Fresno County 211
- Merced County 170
- Tulare County 157
- Los Angeles County 139
- Madera County 91
- San Bernardino County 74
- Monterey County 49
- Riverside County 29
- Kings County 23
- Sacramento County 17
- Ventura County 17
- San Diego County 11
- Orange County 10
- Santa Cruz County 7
- Undetermined County 6
- Humboldt County 6
California, other years
Air-emissions stack tests recorded in California, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-03-11 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-11 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-11 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-11 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-11 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-11 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-11 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-10 | MOSS LANDING POWER COMPANY LLC (FRMLY DYNEGY MOSS LANDING LLC) | MOSS LANDING, Monterey, CA | Pass | Local |
| 2025-03-10 | MOSS LANDING POWER COMPANY LLC (FRMLY DYNEGY MOSS LANDING LLC) | MOSS LANDING, Monterey, CA | Pass | Local |
| 2025-03-10 | MOSS LANDING POWER COMPANY LLC (FRMLY DYNEGY MOSS LANDING LLC) | MOSS LANDING, Monterey, CA | Pass | Local |
| 2025-03-10 | MOSS LANDING POWER COMPANY LLC (FRMLY DYNEGY MOSS LANDING LLC) | MOSS LANDING, Monterey, CA | Pass | Local |
| 2025-03-10 | 3M COMPANY | CORONA, Riverside, CA | Pass | Local |
| 2025-03-10 | 3M COMPANY | CORONA, Riverside, CA | Pass | Local |
| 2025-03-10 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-10 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-10 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-10 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-10 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-10 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-10 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-10 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-10 | NORTHERN CALIFORNIA POWER AGENCY | LODI, San Joaquin, CA | Pass | Local |
| 2025-03-10 | NORTHERN CALIFORNIA POWER AGENCY | LODI, San Joaquin, CA | Pass | Local |
| 2025-03-10 | NORTHERN CALIFORNIA POWER AGENCY | LODI, San Joaquin, CA | Pass | Local |
| 2025-03-07 | BAKERSFIELD CITY WASTEWATER #3 | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-07 | BAKERSFIELD CITY WASTEWATER #3 | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-07 | BAKERSFIELD CITY WASTEWATER #3 | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-06 | SO CAL GAS - BLYTHE | BLYTHE, Riverside, CA | Pass | Local |
| 2025-03-06 | SO CAL GAS - BLYTHE | BLYTHE, Riverside, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-06 | LINN OPERATING INC | KERN (SUBDIVISION), Kern, CA | Pass | Local |
| 2025-03-05 | SEARLES VALLEY MINERALS (IMC CHEMICALS) — high-priority violation on file | TRONA, San Bernardino, CA | Pass | Local |
| 2025-03-05 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-05 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-05 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-05 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-05 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-05 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-05 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-05 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-05 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-05 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-05 | SILGAN CONTAINERS CORP | RIVERBANK, Stanislaus, CA | Pass | Local |
| 2025-03-05 | SILGAN CONTAINERS CORP | RIVERBANK, Stanislaus, CA | Pass | Local |
| 2025-03-05 | SILGAN CONTAINERS CORP | RIVERBANK, Stanislaus, CA | Pass | Local |
| 2025-03-05 | SILGAN CONTAINERS CORP | RIVERBANK, Stanislaus, CA | Pass | Local |
| 2025-03-05 | SILGAN CONTAINERS CORP | RIVERBANK, Stanislaus, CA | Pass | Local |
| 2025-03-05 | SILGAN CONTAINERS CORP | RIVERBANK, Stanislaus, CA | Pass | Local |
| 2025-03-04 | SEARLES VALLEY MINERALS (IMC CHEMICALS) — high-priority violation on file | TRONA, San Bernardino, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | MC KITTRICK LTD | MCKITTRICK, Kern, CA | Pass | Local |
| 2025-03-04 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Fail | Local |
| 2025-03-04 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Fail | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.