EPA Air · stack tests by state, industry and year

Mining and quarrying (NAICS 2123): stack tests in Washington, 2025

• 33Stack 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 Washington 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 Washington, other years

• 2024 40
• 2023 35
• 2022 5
• 2021 5
• 2019 5
• 2018 4
• 2017 14

Other industries in Washington, 2025

• Paper manufacturing (NAICS 3221) 84
• Petroleum and coal products manufacturing (NAICS 3241) 25
• Utilities (NAICS 2211) 21
• Chemical manufacturing (NAICS 3251) 12
• Pipeline transportation (NAICS 4862) 11
• Wood product manufacturing (NAICS 3211) 10
• Transportation equipment manufacturing (NAICS 3364) 7
• NAICS 9999 6
• Chemical manufacturing (NAICS 3253) 6
• Primary metal manufacturing (NAICS 3311) 5
• Primary metal manufacturing (NAICS 3315) 4
• Primary metal manufacturing (NAICS 3313) 4
• Utilities (NAICS 2213) 3
• Plastics and rubber products manufacturing (NAICS 3261) 3
• Wood product manufacturing (NAICS 3212) 3

Air-emissions stack tests recorded in Washington, 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.