EPA Air · stack tests by state, industry and year

Primary metal manufacturing (NAICS 3311): stack tests in Missouri, 2025

• 4Stack 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 2025 at a Missouri source whose primary industry code is NAICS 3311. A facility filing more than one industry code is counted under the first one on its record.

Primary metal manufacturing (NAICS 3311) in Missouri, other years

• 2023 6
• 2022 5
• 2021 10
• 2020 8

Other industries in Missouri, 2025

• Mining and quarrying (NAICS 2123) 285
• Electrical equipment and appliance manufacturing (NAICS 3359) 219
• Waste management and remediation (NAICS 5622) 36
• Utilities (NAICS 2211) 34
• Nonmetallic mineral product manufacturing (NAICS 3274) 33
• Primary metal manufacturing (NAICS 3314) 25
• Nonmetallic mineral product manufacturing (NAICS 3273) 23
• Utilities (NAICS 2213) 13
• Pipeline transportation (NAICS 4862) 11
• Transportation equipment manufacturing (NAICS 3361) 10
• Petroleum and coal products manufacturing (NAICS 3241) 8
• Waste management and remediation (NAICS 5629) 7
• Plastics and rubber products manufacturing (NAICS 3261) 7
• Merchant wholesalers, nondurable goods (NAICS 4245) 6
• Paper manufacturing (NAICS 3222) 6
• Warehousing and storage (NAICS 4931) 5
• Transportation equipment manufacturing (NAICS 3364) 4
• Chemical manufacturing (NAICS 3254) 3
• Food manufacturing (NAICS 3112) 3
• Chemical manufacturing (NAICS 3251) 3
• Nonmetallic mineral product manufacturing (NAICS 3272) 3
• Fabricated metal product manufacturing (NAICS 3323) 3

Air-emissions stack tests recorded in Missouri, 2025

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.