EPA Air · stack tests by state, industry and year

Mining and quarrying (NAICS 2121): stack tests in Arkansas, 2025

• 5Stack 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 Arkansas source whose primary industry code is NAICS 2121. A facility filing more than one industry code is counted under the first one on its record.

Mining and quarrying (NAICS 2121) in Arkansas, other years

• 2026 4
• 2022 4
• 2020 8
• 2018 4

Other industries in Arkansas, 2025

• Pipeline transportation (NAICS 4862) 291
• Mining and quarrying (NAICS 2123) 70
• Primary metal manufacturing (NAICS 3311) 43
• Utilities (NAICS 2211) 30
• Mining support (NAICS 2131) 26
• Paper manufacturing (NAICS 3221) 21
• Petroleum and coal products manufacturing (NAICS 3241) 16
• Waste management and remediation (NAICS 5622) 16
• Wood product manufacturing (NAICS 3211) 15
• Chemical manufacturing (NAICS 3251) 13
• Chemical manufacturing (NAICS 3259) 12
• Wood product manufacturing (NAICS 3212) 10
• Fabricated metal product manufacturing (NAICS 3328) 7
• Wood product manufacturing (NAICS 3219) 7
• Plastics and rubber products manufacturing (NAICS 3262) 6
• Textile mills (NAICS 3132) 5
• Nonmetallic mineral product manufacturing (NAICS 3271) 4
• Food manufacturing (NAICS 3116) 4
• Oil and gas extraction (NAICS 2111) 3
• Utilities (NAICS 2212) 3

Air-emissions stack tests recorded in Arkansas, 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.