EPA Air · stack tests by state, industry and year

NAICS 9999: stack tests in California, 2017

• 558Stack 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 2017 at a California source whose primary industry code is NAICS 9999. A facility filing more than one industry code is counted under the first one on its record.

NAICS 9999 in California, other years

• 2026 50
• 2025 193
• 2024 715
• 2023 322
• 2022 499
• 2021 1,017
• 2020 255
• 2019 290
• 2018 249

Other industries in California, 2017

• Utilities (NAICS 2211) 3,566
• Oil and gas extraction (NAICS 2111) 2,549
• Food manufacturing (NAICS 3114) 333
• Waste management and remediation (NAICS 5622) 237
• Nonmetallic mineral product manufacturing (NAICS 3272) 218
• Petroleum and coal products manufacturing (NAICS 3241) 151
• Pipeline transportation (NAICS 4862) 112
• Food manufacturing (NAICS 3119) 103
• Beverage and tobacco manufacturing (NAICS 3121) 84
• Food manufacturing (NAICS 3115) 73
• Utilities (NAICS 2213) 62
• Plastics and rubber products manufacturing (NAICS 3261) 61
• Pipeline transportation (NAICS 4861) 45
• Nonmetallic mineral product manufacturing (NAICS 3273) 38
• Merchant wholesalers, nondurable goods (NAICS 4247) 38
• Executive and legislative government (NAICS 9211) 30
• Food manufacturing (NAICS 3112) 27
• Mining and quarrying (NAICS 2123) 24
• Nonmetallic mineral product manufacturing (NAICS 3279) 24
• Justice, public order and safety (NAICS 9221) 24
• Chemical manufacturing (NAICS 3253) 23
• Chemical manufacturing (NAICS 3251) 18
• Food manufacturing (NAICS 3116) 16
• Fabricated metal product manufacturing (NAICS 3324) 16
• Fabricated metal product manufacturing (NAICS 3321) 16
• Hospitals (NAICS 6221) 15
• Nonmetallic mineral product manufacturing (NAICS 3274) 15
• Paper manufacturing (NAICS 3222) 14
• Educational services (NAICS 6113) 14
• Waste management and remediation (NAICS 5629) 13
• Administration of environmental programs (NAICS 9241) 11
• Animal production (NAICS 1121) 10
• Fabricated metal product manufacturing (NAICS 3323) 8
• National security and international affairs (NAICS 9281) 8
• Space research and technology (NAICS 9271) 7
• Food manufacturing (NAICS 3111) 6
• NAICS 4543 5
• Wood product manufacturing (NAICS 3219) 4
• Primary metal manufacturing (NAICS 3315) 4
• Transportation equipment manufacturing (NAICS 3364) 3
• Food manufacturing (NAICS 3113) 3
• Nonmetallic mineral product manufacturing (NAICS 3271) 3

Air-emissions stack tests recorded in California, 2017

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.