EPA Air · stack tests by state, industry and year
Chemical manufacturing (NAICS 3251): stack tests in California, 2026
- 7Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row is one stack test recorded during 2026 at a California source whose primary industry code is NAICS 3251. A facility filing more than one industry code is counted under the first one on its record.
Chemical manufacturing (NAICS 3251) in California, other years
Other industries in California, 2026
- Utilities (NAICS 2211) 327
- Oil and gas extraction (NAICS 2111) 193
- Pipeline transportation (NAICS 4862) 76
- Nonmetallic mineral product manufacturing (NAICS 3272) 60
- NAICS 9999 50
- Petroleum and coal products manufacturing (NAICS 3241) 48
- Beverage and tobacco manufacturing (NAICS 3121) 45
- Waste management and remediation (NAICS 5622) 31
- Food manufacturing (NAICS 3114) 21
- Justice, public order and safety (NAICS 9221) 20
- Paper manufacturing (NAICS 3222) 12
- Animal production (NAICS 1121) 8
- Food manufacturing (NAICS 3116) 7
- Food manufacturing (NAICS 3115) 7
- Waste management and remediation (NAICS 5629) 7
- Plastics and rubber products manufacturing (NAICS 3261) 6
- NAICS 4543 6
- Fabricated metal product manufacturing (NAICS 3324) 6
- National security and international affairs (NAICS 9281) 5
- Wood product manufacturing (NAICS 3219) 5
- Food manufacturing (NAICS 3119) 5
- Pipeline transportation (NAICS 4861) 5
- Food manufacturing (NAICS 3118) 4
- Merchant wholesalers, nondurable goods (NAICS 4244) 4
- Mining support (NAICS 2131) 3
- Administration of environmental programs (NAICS 9241) 3
Air-emissions stack tests recorded in California, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-04-20 | PACIFIC ETHANOL STOCKTON — high-priority violation on file | STOCKTON, San Joaquin, CA | Pass | Local |
| 2026-04-20 | PACIFIC ETHANOL STOCKTON — high-priority violation on file | STOCKTON, San Joaquin, CA | Pass | Local |
| 2026-03-20 | TESORO REFINING AND MARKETING CO, LLC | CARSON, Los Angeles, CA | Pass | Local |
| 2026-03-16 | TESORO REFINING AND MARKETING CO, LLC | CARSON, Los Angeles, CA | Pass | Local |
| 2026-03-05 | AIR LIQUID LARGE INDUSTRIES US, LP | EL SEGUNDO, Los Angeles, CA | Pass | Local |
| 2026-02-19 | AIR LIQUID LARGE INDUSTRIES US, LP | EL SEGUNDO, Los Angeles, CA | Pass | Local |
| 2026-01-22 | AIR LIQUID LARGE INDUSTRIES US, LP | EL SEGUNDO, Los Angeles, CA | Pass | Local |
Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.