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 |
|---|---|---|---|---|
| 2025-09-02 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-09-02 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-09-02 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-09-02 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-09-02 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-09-02 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-29 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-29 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-29 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-29 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-29 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-29 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-29 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-29 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-28 | LADW&P-HAYNES STEAM | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2025-08-28 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-08-28 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-08-28 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-08-28 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-08-28 | STANISLAUS FOOD PRODUCTS CO — high-priority violation on file | MODESTO, Stanislaus, CA | Pass | Local |
| 2025-08-28 | STANISLAUS FOOD PRODUCTS CO — high-priority violation on file | MODESTO, Stanislaus, CA | Pass | Local |
| 2025-08-28 | STANISLAUS FOOD PRODUCTS CO — high-priority violation on file | MODESTO, Stanislaus, CA | Pass | Local |
| 2025-08-28 | STANISLAUS FOOD PRODUCTS CO — high-priority violation on file | MODESTO, Stanislaus, CA | Pass | Local |
| 2025-08-28 | STANISLAUS FOOD PRODUCTS CO — high-priority violation on file | MODESTO, Stanislaus, CA | Pass | Local |
| 2025-08-28 | STANISLAUS FOOD PRODUCTS CO — high-priority violation on file | MODESTO, Stanislaus, CA | Pass | Local |
| 2025-08-28 | STANISLAUS FOOD PRODUCTS CO — high-priority violation on file | MODESTO, Stanislaus, CA | Pass | Local |
| 2025-08-28 | STANISLAUS FOOD PRODUCTS CO — high-priority violation on file | MODESTO, Stanislaus, CA | Pass | Local |
| 2025-08-28 | STANISLAUS FOOD PRODUCTS CO — high-priority violation on file | MODESTO, Stanislaus, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Fail | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-28 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2025-08-27 | LADW&P-HAYNES STEAM | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2025-08-27 | LA CITY, DWP SCATTERGOOD GENERATING STN | PLAYA DEL REY, Los Angeles, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-27 | E & J GALLO WINERY | FRESNO, Fresno, CA | Pass | Local |
| 2025-08-26 | TESORO LOGISTICS MARINE TERMINAL 2 | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2025-08-22 | LADW&P-HAYNES STEAM | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2025-08-22 | PASADENA CITY, DWP (EIS USE) | PASADENA, Los Angeles, CA | Pass | Local |
| 2025-08-21 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-21 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-20 | LADW&P-HAYNES STEAM | LONG BEACH, Los Angeles, CA | Pass | Local |
| 2025-08-20 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-20 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-20 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-08-20 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.