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 |
|---|---|---|---|---|
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-08 | CHEVRON COGENERATION COMPANY | FRESNO, Kern, CA | Pass | Local |
| 2025-04-07 | CITY OF RIVERSIDE PUBLIC UTILITIES DEPT | RIVERSIDE, Riverside, CA | Pass | Local |
| 2025-04-03 | IVANPAH I, II, III | IVANPAH, San Bernardino, CA | Pass | Local |
| 2025-04-03 | IVANPAH I, II, III | IVANPAH, San Bernardino, CA | Pass | Local |
| 2025-04-03 | IVANPAH I, II, III | IVANPAH, San Bernardino, CA | Pass | Local |
| 2025-04-03 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-04-03 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-04-03 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-04-03 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | CALIFORNIA RESOURCES ELK HILLS LLC — high-priority violation on file | TUPMAN, Kern, CA | Pass | Local |
| 2025-04-03 | KRAFT HEINZ FOODS CO | TULARE, Tulare, CA | Pass | Local |
| 2025-04-03 | KRAFT HEINZ FOODS CO | TULARE, Tulare, CA | Pass | Local |
| 2025-04-03 | GLASS HOUSE CAMARILLO CULTIVATION LLC | CAMARILLO, Ventura, CA | Pass | Local |
| 2025-04-02 | WASTE MGMT DISP &RECY SERVS INC (BRADLEY | SUN VALLEY, Los Angeles, CA | Fail | Local |
| 2025-04-01 | OMYA CALIFORNIA | LUCERNE VALLEY, San Bernardino, CA | Pass | Local |
| 2025-04-01 | AEROCRAFT HEAT TREATING CO INC | PARAMOUNT, Los Angeles, CA | Pass | Local |
| 2025-03-31 | 3M COMPANY | CORONA, Riverside, CA | Pass | Local |
| 2025-03-31 | 3M COMPANY | CORONA, Riverside, CA | Pass | Local |
| 2025-03-31 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-31 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-31 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-31 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-30 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-03-30 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-03-30 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-03-30 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-03-30 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-03-30 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-03-28 | SO CAL GAS - NO. NEEDLES | NEEDLES, San Bernardino, CA | Pass | Local |
| 2025-03-28 | SO CAL GAS - NO. NEEDLES | NEEDLES, San Bernardino, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | BEAR MOUNTAIN LTD | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-27 | TRUSTEES OF CSU & CSUCI SITE AUTHORITY | CAMARILLO, Ventura, CA | Pass | Local |
| 2025-03-26 | SO CAL GAS - NEWBERRY SPRINGS | NEWBERRY SPRINGS, San Bernardino, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-26 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-25 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-25 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-24 | SO CAL GAS - ADELANTO | ADELANTO, San Bernardino, CA | Pass | Local |
| 2025-03-24 | LIVE OAK LIMITED | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-24 | LIVE OAK LIMITED | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-24 | LIVE OAK LIMITED | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-24 | LIVE OAK LIMITED | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-03-24 | LIVE OAK LIMITED | BAKERSFIELD, Kern, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.