EPA Air · stack tests by state, industry and year

Pipeline transportation (NAICS 4862): stack tests in Iowa, 2026

• 8Stack 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 Iowa source whose primary industry code is NAICS 4862. A facility filing more than one industry code is counted under the first one on its record.

Pipeline transportation (NAICS 4862) in Iowa, other years

• 2025 9
• 2024 11
• 2023 7
• 2022 11
• 2021 10
• 2020 10
• 2019 11
• 2018 4
• 2017 6

Other industries in Iowa, 2026

• Chemical manufacturing (NAICS 3251) 58
• Utilities (NAICS 2211) 27
• Food manufacturing (NAICS 3112) 15
• Publishing industries (NAICS 5112) 8
• Primary metal manufacturing (NAICS 3311) 7
• Nonmetallic mineral product manufacturing (NAICS 3273) 5
• Chemical manufacturing (NAICS 3253) 4
• Professional, scientific and technical services (NAICS 5419) 4
• Primary metal manufacturing (NAICS 3315) 4
• Administration of environmental programs (NAICS 9241) 4
• Food manufacturing (NAICS 3111) 3
• Food manufacturing (NAICS 3116) 3

Air-emissions stack tests recorded in Iowa, 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.