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 |
|---|---|---|---|---|
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-30 | CALIFORNIA DAIRIES INC — high-priority violation on file | VISALIA, Tulare, CA | Pass | Local |
| 2025-01-30 | CALIFORNIA DAIRIES INC — high-priority violation on file | VISALIA, Tulare, CA | Pass | Local |
| 2025-01-30 | CALIFORNIA DAIRIES INC — high-priority violation on file | VISALIA, Tulare, CA | Pass | Local |
| 2025-01-30 | CALIFORNIA DAIRIES INC — high-priority violation on file | VISALIA, Tulare, CA | Pass | Local |
| 2025-01-30 | CALIFORNIA DAIRIES INC — high-priority violation on file | VISALIA, Tulare, CA | Pass | Local |
| 2025-01-30 | CALIFORNIA DAIRIES INC — high-priority violation on file | VISALIA, Tulare, CA | Pass | Local |
| 2025-01-29 | SOUTHERN CALIFORNIA EDISON | REDLANDS, San Bernardino, CA | Pass | Local |
| 2025-01-29 | SOUTHERN CALIFORNIA EDISON | REDLANDS, San Bernardino, CA | Pass | Local |
| 2025-01-29 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CALIFORNIA RESOURCES PRODUCTION CORP — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-29 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | MITSUBISHI CHEMICAL CARBON FIBER AND COMPOSITES — high-priority violation on file | SACRAMENTO, Sacramento, CA | Pass | Local |
| 2025-01-28 | BRIDGE ENERGY, LLC | BREA, Orange, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-28 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-27 | BRIDGE ENERGY, LLC | BREA, Orange, CA | Pass | Local |
| 2025-01-27 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-27 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-27 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-27 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-27 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-27 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-27 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-27 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-27 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-24 | HIGH DESERT POWER PROJECT, LLC | VICTORVILLE, San Bernardino, CA | Pass | Local |
| 2025-01-24 | HIGH DESERT POWER PROJECT, LLC | VICTORVILLE, San Bernardino, CA | Pass | Local |
| 2025-01-24 | HIGH DESERT POWER PROJECT, LLC | VICTORVILLE, San Bernardino, CA | Pass | Local |
| 2025-01-24 | AIR PROD & CHEM INC | CARSON, Los Angeles, CA | Pass | Local |
| 2025-01-24 | WALNUT CREEK ENERGY, LLC | CITY OF INDUSTRY, Los Angeles, CA | Pass | Local |
| 2025-01-24 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-24 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | WALNUT CREEK ENERGY, LLC | CITY OF INDUSTRY, Los Angeles, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-23 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-22 | AIR PRODUCTS MANUFACTURING, LLC — high-priority violation on file | PARAMOUNT, Los Angeles, CA | Pass | Local |
| 2025-01-22 | QUEMETCO INC | CITY OF INDUSTRY, Los Angeles, CA | Pass | Local |
| 2025-01-22 | WALNUT CREEK ENERGY, LLC | CITY OF INDUSTRY, Los Angeles, CA | Pass | Local |
| 2025-01-22 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-22 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-01-22 | CHEVRON COGENERATION COMPANY | BAKERSFIELD, Kern, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.