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 |
|---|---|---|---|---|
| 2025-07-18 | STOCKTON RWCF — high-priority violation on file | STOCKTON, San Joaquin, CA | Fail | Local |
| 2025-07-17 | SO CAL EDISON CO | AVALON, Los Angeles, CA | Pass | Local |
| 2025-07-17 | NASSCO (NAT'L STEEL & SHIPBUILDING) | SAN DIEGO, San Diego, CA | Pass | Local |
| 2025-07-16 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-16 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-16 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-16 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-16 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-16 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-15 | AMERESCO SANTA CRUZ ENERGY LLC | WATSONVILLE, Santa Cruz, CA | Fail | Local |
| 2025-07-15 | SO CAL EDISON CO | AVALON, Los Angeles, CA | Pass | Local |
| 2025-07-15 | ENERY HOLDINGS LLC | CARSON, Los Angeles, CA | Pass | Local |
| 2025-07-15 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-15 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-15 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-15 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-15 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-15 | LOS GATOS TOMATO PRODUCTS | HURON, Fresno, CA | Pass | Local |
| 2025-07-15 | CALIFORNIA RESOURCES PRODUCTION CORP | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-15 | CALIFORNIA RESOURCES PRODUCTION CORP | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-15 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-07-11 | HECK CELLARS — high-priority violation on file | CALIFORNIA, Undetermined, CA | Pass | Local |
| 2025-07-11 | HECK CELLARS — high-priority violation on file | CALIFORNIA, Undetermined, CA | Pass | Local |
| 2025-07-11 | HECK CELLARS — high-priority violation on file | CALIFORNIA, Undetermined, CA | Pass | Local |
| 2025-07-11 | HECK CELLARS — high-priority violation on file | CALIFORNIA, Undetermined, CA | Pass | Local |
| 2025-07-11 | HECK CELLARS — high-priority violation on file | CALIFORNIA, Undetermined, CA | Pass | Local |
| 2025-07-11 | HECK CELLARS — high-priority violation on file | CALIFORNIA, Undetermined, CA | Pass | Local |
| 2025-07-11 | PACIFIC ETHANOL STOCKTON — high-priority violation on file | STOCKTON, San Joaquin, CA | Pass | Local |
| 2025-07-11 | PACIFIC ETHANOL STOCKTON — high-priority violation on file | STOCKTON, San Joaquin, CA | Pass | Local |
| 2025-07-10 | CEMEX LLC - BLACK MT. QUARRY | APPLE VALLEY, San Bernardino, CA | Pass | Local |
| 2025-07-10 | CEMEX LLC - BLACK MT. QUARRY | APPLE VALLEY, San Bernardino, CA | Pass | Local |
| 2025-07-10 | INEOS POLYPROPYLENE LLC | CARSON, Los Angeles, CA | Pass | Local |
| 2025-07-10 | INEOS POLYPROPYLENE LLC | CARSON, Los Angeles, CA | Pass | Local |
| 2025-07-10 | O'NEILL BEVERAGES CO LLC | PARLIER, Fresno, CA | Pass | Local |
| 2025-07-10 | O'NEILL BEVERAGES CO LLC | PARLIER, Fresno, CA | Pass | Local |
| 2025-07-10 | O'NEILL BEVERAGES CO LLC | PARLIER, Fresno, CA | Pass | Local |
| 2025-07-10 | O'NEILL BEVERAGES CO LLC | PARLIER, Fresno, CA | Pass | Local |
| 2025-07-10 | O'NEILL BEVERAGES CO LLC | PARLIER, Fresno, CA | Pass | Local |
| 2025-07-10 | O'NEILL BEVERAGES CO LLC | PARLIER, Fresno, CA | Pass | Local |
| 2025-07-10 | O'NEILL BEVERAGES CO LLC | PARLIER, Fresno, CA | Pass | Local |
| 2025-07-10 | O'NEILL BEVERAGES CO LLC | PARLIER, Fresno, CA | Pass | Local |
| 2025-07-10 | LINN OPERATING INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-10 | LINN OPERATING INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-10 | LINN OPERATING INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-10 | LINN OPERATING INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-10 | LINN OPERATING INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-10 | PREGIS INNOVATIVE PACKAGING INC | VISALIA, Tulare, CA | Fail | Local |
| 2025-07-09 | INEOS POLYPROPYLENE LLC | CARSON, Los Angeles, CA | Pass | Local |
| 2025-07-09 | INEOS POLYPROPYLENE LLC | CARSON, Los Angeles, CA | Pass | Local |
| 2025-07-09 | INEOS POLYPROPYLENE LLC | CARSON, Los Angeles, CA | Pass | Local |
| 2025-07-09 | INEOS POLYPROPYLENE LLC | CARSON, Los Angeles, CA | Pass | Local |
| 2025-07-09 | INEOS POLYPROPYLENE LLC | CARSON, Los Angeles, CA | Pass | Local |
| 2025-07-09 | TOLAND ROAD LANDFILL — high-priority violation on file | SANTA PAULA, Ventura, CA | Pass | Local |
| 2025-07-07 | TRICOR REFINING, LLC — high-priority violation on file | OILDALE, Kern, CA | Pass | Local |
| 2025-07-07 | TRICOR REFINING, LLC — high-priority violation on file | OILDALE, Kern, CA | Pass | Local |
| 2025-07-07 | TRICOR REFINING, LLC — high-priority violation on file | OILDALE, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | E&B NATIONAL RESOURCES MANAGEMENT | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-07-02 | U S INTEC, INC | STOCKTON, San Joaquin, CA | Pass | Local |
| 2025-07-02 | U S INTEC, INC | STOCKTON, San Joaquin, CA | Pass | Local |
| 2025-07-02 | U S INTEC, INC | STOCKTON, San Joaquin, CA | Pass | Local |
| 2025-07-02 | U S INTEC, INC | STOCKTON, San Joaquin, CA | Pass | Local |
| 2025-07-02 | U S INTEC, INC | STOCKTON, San Joaquin, CA | Pass | Local |
| 2025-07-02 | U S INTEC, INC | STOCKTON, San Joaquin, CA | Pass | Local |
| 2025-07-02 | U S INTEC, INC | STOCKTON, San Joaquin, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.