EPA Air · stack tests by state and year
Air-emissions stack tests in California, 2023
- 7,676Stack 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 2023; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in California, 2023
- Kern County 3,964
- Fresno County 1,186
- Stanislaus County 595
- San Joaquin County 551
- Kings County 322
- Madera County 233
- Merced County 226
- Los Angeles County 203
- Tulare County 110
- San Bernardino County 71
- Orange County 70
- Ventura County 26
- Sacramento County 25
- Monterey County 24
- Riverside County 22
- Undetermined County 20
- San Diego County 12
- Placer County 8
- Santa Cruz County 4
- Humboldt County 3
California, other years
Air-emissions stack tests recorded in California, 2023
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2023-10-19 | CALIFORNIA RESOURCES PRODUCTION CORP | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-19 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2023-10-19 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2023-10-19 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2023-10-19 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2023-10-18 | SO CAL GAS - BLYTHE | BLYTHE, Riverside, CA | Pass | Local |
| 2023-10-18 | SILGAN CONTAINERS | SACRAMENTO, Sacramento, CA | Pass | Local |
| 2023-10-18 | HARBOR COGENERATION CO, LLC | WILMINGTON, Los Angeles, CA | Pass | Local |
| 2023-10-18 | UCSD | LA JOLLA, San Diego, CA | Pending | Local |
| 2023-10-18 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | MACPHERSON OIL CO - HEAVY OIL | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-18 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.