EPA Air · stack tests by state, industry and year

Hospitals (NAICS 6221): stack tests in Iowa, 2022

• 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 2022 at a Iowa source whose primary industry code is NAICS 6221. A facility filing more than one industry code is counted under the first one on its record.

Hospitals (NAICS 6221) in Iowa, other years

• 2025 5

Other industries in Iowa, 2022

• Chemical manufacturing (NAICS 3251) 138
• Utilities (NAICS 2211) 102
• Food manufacturing (NAICS 3112) 53
• Nonmetallic mineral product manufacturing (NAICS 3274) 13
• Waste management and remediation (NAICS 5622) 12
• Electrical equipment and appliance manufacturing (NAICS 3353) 11
• Pipeline transportation (NAICS 4862) 11
• Machinery manufacturing (NAICS 3331) 10
• Nonmetallic mineral product manufacturing (NAICS 3273) 10
• Primary metal manufacturing (NAICS 3315) 8
• Chemical manufacturing (NAICS 3253) 7
• Utilities (NAICS 2213) 6
• Data processing and hosting (NAICS 5182) 4
• Primary metal manufacturing (NAICS 3311) 4
• Mining and quarrying (NAICS 2123) 4
• Chemical manufacturing (NAICS 3259) 4
• Wood product manufacturing (NAICS 3219) 4
• Food manufacturing (NAICS 3111) 4
• Primary metal manufacturing (NAICS 3313) 3
• Fabricated metal product manufacturing (NAICS 3323) 3
• Agriculture and forestry support (NAICS 1151) 3

Air-emissions stack tests recorded in Iowa, 2022

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.