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 |
|---|---|---|---|---|
| 2025-05-29 | ORMOND BEACH GENERATING STATION | OXNARD, Ventura, CA | Pass | Local |
| 2025-05-28 | TESORO REFINING & MARKETING CO, LLC — high-priority violation on file | CARSON, Los Angeles, CA | Pass | Local |
| 2025-05-28 | TESORO REFINING & MARKETING CO, LLC — high-priority violation on file | CARSON, Los Angeles, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-28 | CERTAINTEED CORP — high-priority violation on file | CHOWCHILLA, Madera, CA | Pass | Local |
| 2025-05-27 | TESORO REFINING & MARKETING CO, LLC — high-priority violation on file | CARSON, Los Angeles, CA | Pass | Local |
| 2025-05-23 | SO CAL GAS - NO. NEEDLES | NEEDLES, San Bernardino, CA | Pass | Local |
| 2025-05-23 | SO CAL GAS - NO. NEEDLES | NEEDLES, San Bernardino, CA | Pass | Local |
| 2025-05-22 | IVANPAH I, II, III | IVANPAH, San Bernardino, CA | Pass | Local |
| 2025-05-22 | IVANPAH I, II, III | IVANPAH, San Bernardino, CA | Pass | Local |
| 2025-05-22 | AIR PRODUCTS AND CHEMICALS INC | WILMINGTON, Los Angeles, CA | Pass | Local |
| 2025-05-22 | SAN JOAQUIN REFINING CO — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-22 | SAN JOAQUIN REFINING CO — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-22 | CALIFORNIA RESOURCES PRODUCTION CORP | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-22 | CALIFORNIA RESOURCES PRODUCTION CORP | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-22 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-05-22 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-05-22 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-05-22 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-05-22 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-05-22 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-05-22 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-05-22 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-05-22 | E&J GALLO WINERY — high-priority violation on file | LIVINGSTON, Merced, CA | Pass | Local |
| 2025-05-22 | FORWARD INC. LANDFILL — high-priority violation on file | MANTECA, San Joaquin, CA | Pass | Local |
| 2025-05-22 | FORWARD INC. LANDFILL — high-priority violation on file | MANTECA, San Joaquin, CA | Pass | Local |
| 2025-05-22 | FORWARD INC. LANDFILL — high-priority violation on file | MANTECA, San Joaquin, CA | Pass | Local |
| 2025-05-22 | FORWARD INC. LANDFILL — high-priority violation on file | MANTECA, San Joaquin, CA | Pass | Local |
| 2025-05-22 | FORWARD INC. LANDFILL — high-priority violation on file | MANTECA, San Joaquin, CA | Pass | Local |
| 2025-05-22 | FORWARD INC. LANDFILL — high-priority violation on file | MANTECA, San Joaquin, CA | Pass | Local |
| 2025-05-21 | SEARLES VALLEY MINERALS (IMC CHEMICALS) — high-priority violation on file | TRONA, San Bernardino, CA | Pass | Local |
| 2025-05-20 | TESORO REFINING & MARKETING CO, LLC — high-priority violation on file | CARSON, Los Angeles, CA | Pass | Local |
| 2025-05-19 | EQUILON ENTER. LLC, SHELL OIL PROD. US | CARSON, Los Angeles, CA | Pass | Local |
| 2025-05-19 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-19 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-19 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-19 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-19 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | LODI GAS STORAGE LLC | ACAMPO, San Joaquin, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | CALIFORNIA DAIRIES, INC | TIPTON, Tulare, CA | Pass | Local |
| 2025-05-16 | NEW-INDY OXNARD, LLC | OXNARD, Ventura, CA | Pass | Local |
| 2025-05-15 | CRESTWOOD WEST COAST LLC | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-15 | CRESTWOOD WEST COAST LLC | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-15 | CRESTWOOD WEST COAST LLC | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-15 | CRESTWOOD WEST COAST LLC | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2025-05-15 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.