EPA Air · stack tests by county and year
Air-emissions stack tests in Los Angeles County, California, 2025
- 139Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Los Angeles County, California during 2025. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Los Angeles County facility page.
Los Angeles County, California, 2025
- Inspections 177
Air-emissions stack tests in Los Angeles County, other years
Air-emissions stack tests recorded in Los Angeles County, California, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-05-12 | TESORO REFINING AND MARKETING CO — high-priority violation on file | Pass | Local |
| 2025-05-08 | E.M.E. INC/ELECTRO MACHINE & ENGINEERING | Pass | Local |
| 2025-05-02 | AES ALAMITOS STATION, LLC | Pass | Local |
| 2025-04-30 | AES ALAMITOS STATION, LLC | Pass | Local |
| 2025-04-30 | EL SEGUNDO ENERGY CENTER LLC | Pass | Local |
| 2025-04-24 | AZUSA LAND RECLAMATION | Pass | Local |
| 2025-04-24 | EQUILON ENTERPRISES LLC SHELL OIL PROD | Pass | Local |
| 2025-04-21 | WALNUT CREEK ENERGY, LLC | Pass | Local |
| 2025-04-16 | SO CAL EDISON CO | Pass | Local |
| 2025-04-15 | SO CAL EDISON CO | Pass | Local |
| 2025-04-14 | SO CAL GAS CO | Pass | Local |
| 2025-04-14 | SO CAL GAS CO | Pass | Local |
| 2025-04-02 | WASTE MGMT DISP &RECY SERVS INC (BRADLEY | Fail | Local |
| 2025-04-01 | AEROCRAFT HEAT TREATING CO INC | Pass | Local |
| 2025-03-19 | TESORO REFINING AND MARKETING CO — high-priority violation on file | Pass | Local |
| 2025-02-14 | WALNUT CREEK ENERGY, LLC | Pass | Local |
| 2025-02-13 | E.M.E. INC/ELECTRO MACHINE & ENGINEERING | Fail | Local |
| 2025-02-13 | E.M.E. INC/ELECTRO MACHINE & ENGINEERING | Fail | Local |
| 2025-02-13 | WALNUT CREEK ENERGY, LLC | Pass | Local |
| 2025-02-12 | VERNON PUBLIC UTILITIES | Pass | Local |
| 2025-02-11 | VERNON PUBLIC UTILITIES | Pass | Local |
| 2025-02-06 | SHADOW WOLF ENERGY, LLC | Pass | Local |
| 2025-02-05 | BURBANK CITY, BURBANK WATER & POWER | Pass | Local |
| 2025-02-03 | QUEMETCO INC | Pass | Local |
| 2025-01-30 | QUEMETCO INC | Pass | Local |
| 2025-01-24 | AIR PROD & CHEM INC | Pass | Local |
| 2025-01-24 | WALNUT CREEK ENERGY, LLC | Pass | Local |
| 2025-01-23 | WALNUT CREEK ENERGY, LLC | Pass | Local |
| 2025-01-22 | AIR PRODUCTS MANUFACTURING, LLC — high-priority violation on file | Pass | Local |
| 2025-01-22 | QUEMETCO INC | Pass | Local |
| 2025-01-22 | WALNUT CREEK ENERGY, LLC | Pass | Local |
| 2025-01-16 | QUEMETCO INC | Pass | Local |
| 2025-01-15 | AIR PRODUCTS MANUFACTURING, LLC — high-priority violation on file | Pass | Local |
| 2025-01-15 | AIR PRODUCTS MANUFACTURING, LLC — high-priority violation on file | Pass | Local |
| 2025-01-15 | AIR PRODUCTS MANUFACTURING, LLC — high-priority violation on file | Pass | Local |
| 2025-01-15 | AIR PRODUCTS MANUFACTURING, LLC — high-priority violation on file | Pass | Local |
| 2025-01-15 | E.M.E. INC/ELECTRO MACHINE & ENGINEERING | Fail | Local |
| 2025-01-15 | E.M.E. INC/ELECTRO MACHINE & ENGINEERING | Fail | Local |
| 2025-01-09 | SO CAL EDISON CO | Pass | Local |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.