EPA Air · violations by state, industry and year

Chemical manufacturing (NAICS 3251): violations in California, 2025

• 6Violations

A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity. Each row is one violation recorded during 2025 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

• 2024 7
• 2023 5
• 2022 6
• 2021 5
• 2019 3
• 2018 14
• 2017 25

Other industries in California, 2025

• Petroleum and coal products manufacturing (NAICS 3241) 290
• Waste management and remediation (NAICS 5622) 90
• Transportation equipment manufacturing (NAICS 3361) 59
• Utilities (NAICS 2213) 13
• Support activities for transportation (NAICS 4881) 11
• Food manufacturing (NAICS 3113) 9
• Fabricated metal product manufacturing (NAICS 3324) 6
• Mining and quarrying (NAICS 2123) 4
• Utilities (NAICS 2211) 4
• Oil and gas extraction (NAICS 2111) 4
• Beverage and tobacco manufacturing (NAICS 3121) 3

High-priority air violations recorded in California, 2025

Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the violation. Figures from EPA’s ICIS-AIR download.