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 |
|---|---|---|---|---|
| 2021-09-15 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-15 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-15 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-15 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-15 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | AERA ENERGY LLC | SAN ARDO, Monterey, CA | Pass | Local |
| 2021-09-14 | CEMEX LLC - BLACK MT. QUARRY | APPLE VALLEY, San Bernardino, CA | Pass | Local |
| 2021-09-14 | TORRANCE REFINING COMPANY LLC | TORRANCE, Los Angeles, CA | Pass | Local |
| 2021-09-14 | SO CAL GAS CO | VALENCIA, Los Angeles, CA | Pass | Local |
| 2021-09-14 | SO CAL GAS CO | VALENCIA, Los Angeles, CA | Pass | Local |
| 2021-09-14 | SO CAL GAS CO | VALENCIA, Los Angeles, CA | Pass | Local |
| 2021-09-14 | ENERY HOLDINGS LLC | CARSON, Los Angeles, CA | Pass | Local |
| 2021-09-14 | CALPEAK POWER BORDER LLC | SAN DIEGO, San Diego, CA | Pending | Local |
| 2021-09-14 | CHEVRON USA INC | COALINGA, Fresno, CA | Pass | Local |
| 2021-09-14 | CHEVRON USA INC | COALINGA, Fresno, CA | Pass | Local |
| 2021-09-14 | CHEVRON USA INC | COALINGA, Fresno, CA | Pass | Local |
| 2021-09-14 | CHEVRON USA INC | COALINGA, Fresno, CA | Pass | Local |
| 2021-09-14 | CHEVRON USA INC | COALINGA, Fresno, CA | Pass | Local |
| 2021-09-14 | CHEVRON USA INC | COALINGA, Fresno, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
| 2021-09-14 | WOODLAND GENERATION STATION | MODESTO, Stanislaus, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.