EPA Air · stack tests by state, industry and year

Mining and quarrying (NAICS 2123): stack tests in Missouri, 2026

• 188Stack 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 Missouri source whose primary industry code is NAICS 2123. A facility filing more than one industry code is counted under the first one on its record.

Mining and quarrying (NAICS 2123) in Missouri, other years

• 2025 285
• 2024 278
• 2023 60
• 2022 58
• 2021 120
• 2020 239
• 2019 37
• 2018 46
• 2017 42

Other industries in Missouri, 2026

• Electrical equipment and appliance manufacturing (NAICS 3359) 44
• Nonmetallic mineral product manufacturing (NAICS 3273) 19
• Utilities (NAICS 2213) 18
• Utilities (NAICS 2211) 14
• Waste management and remediation (NAICS 5622) 9
• Pipeline transportation (NAICS 4862) 7
• Nonmetallic mineral product manufacturing (NAICS 3274) 5
• Fabricated metal product manufacturing (NAICS 3324) 4
• Primary metal manufacturing (NAICS 3313) 4
• Transportation equipment manufacturing (NAICS 3361) 3
• Petroleum and coal products manufacturing (NAICS 3241) 3

Air-emissions stack tests recorded in Missouri, 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.