EPA Air · stack tests by state, industry and year

Chemical manufacturing (NAICS 3252): stack tests in Texas, 2026

• 9Stack 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 Texas source whose primary industry code is NAICS 3252. A facility filing more than one industry code is counted under the first one on its record.

Chemical manufacturing (NAICS 3252) in Texas, other years

• 2025 6
• 2023 10
• 2022 3
• 2020 4
• 2019 5
• 2018 8
• 2017 7

Other industries in Texas, 2026

• Oil and gas extraction (NAICS 2111) 73
• Utilities (NAICS 2211) 64
• Petroleum and coal products manufacturing (NAICS 3241) 38
• Wood product manufacturing (NAICS 3212) 27
• Chemical manufacturing (NAICS 3251) 20
• Nonmetallic mineral product manufacturing (NAICS 3279) 19
• NAICS 9999 18
• Computer and electronic product manufacturing (NAICS 3344) 13
• Educational services (NAICS 6113) 7
• Primary metal manufacturing (NAICS 3311) 4
• Mining and quarrying (NAICS 2123) 4
• Nonmetallic mineral product manufacturing (NAICS 3273) 3
• Transportation equipment manufacturing (NAICS 3364) 3
• Plastics and rubber products manufacturing (NAICS 3261) 3

Air-emissions stack tests recorded in Texas, 2026

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.