EPA Air · stack tests by state and year
Air-emissions stack tests in California, 2021
- 17,676Stack 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 2021; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in California, 2021
- Kern County 5,165
- Fresno County 4,644
- San Joaquin County 2,302
- Stanislaus County 1,917
- Kings County 1,819
- Merced County 494
- Madera County 448
- Tulare County 273
- Los Angeles County 251
- San Bernardino County 110
- Undetermined County 91
- Riverside County 40
- Monterey County 26
- Ventura County 20
- Sacramento County 19
- Orange County 19
- San Diego County 14
- Placer County 10
- Contra Costa County 3
- Alameda County 3
- Humboldt County 3
California, other years
Air-emissions stack tests recorded in California, 2021
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2021-08-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-08-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-08-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-08-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-08-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-08-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-08-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-08-09 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-08-06 | USMC - YERMO LOGISTICS CNTR | BARSTOW, San Bernardino, CA | Pass | Local |
| 2021-08-06 | PHILLIPS 66 CO/LA REFINERY WILMINGTON — high-priority violation on file | WILMINGTON, Los Angeles, CA | Pass | Local |
| 2021-08-06 | LONG BEACH GENERATION LLC | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2021-08-06 | LONG BEACH GENERATION LLC | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2021-08-06 | LONG BEACH GENERATION LLC | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2021-08-06 | LONG BEACH GENERATION LLC | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2021-08-06 | TRICOR REFINING, LLC — high-priority violation on file | OILDALE, Kern, CA | Pass | Local |
| 2021-08-06 | TRICOR REFINING, LLC — high-priority violation on file | OILDALE, Kern, CA | Pass | Local |
| 2021-08-06 | TRICOR REFINING, LLC — high-priority violation on file | OILDALE, Kern, CA | Pass | Local |
| 2021-08-05 | USMC - YERMO LOGISTICS CNTR | BARSTOW, San Bernardino, CA | Pass | Local |
| 2021-08-05 | CEMEX LLC - BLACK MT. QUARRY | APPLE VALLEY, San Bernardino, CA | Pass | Local |
| 2021-08-05 | LONG BEACH GENERATION LLC | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2021-08-05 | DUCOMMUN AEROSTRUCTURES INC | ORANGE, Orange, CA | Pass | Local |
| 2021-08-05 | SCHLOSSER FORGE CO — high-priority violation on file | RANCHO CUCAMONGA, San Bernardino, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Fail | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
| 2021-08-05 | ALTAGAS SAN JOAQUIN ENERGY INC | TRACY, San Joaquin, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.