EPA Air · stack tests by state, industry and year

Miscellaneous manufacturing (NAICS 3399): stack tests in Mississippi, 2025

• 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 2025 at a Mississippi source whose primary industry code is NAICS 3399. A facility filing more than one industry code is counted under the first one on its record.

Miscellaneous manufacturing (NAICS 3399) in Mississippi, other years

• 2023 6
• 2021 4
• 2019 4
• 2017 8

Other industries in Mississippi, 2025

• Pipeline transportation (NAICS 4862) 103
• Paper manufacturing (NAICS 3221) 100
• Utilities (NAICS 2211) 62
• Data processing and hosting (NAICS 5182) 62
• Utilities (NAICS 2212) 55
• Chemical manufacturing (NAICS 3256) 36
• Chemical manufacturing (NAICS 3252) 34
• Petroleum and coal products manufacturing (NAICS 3241) 31
• Oil and gas extraction (NAICS 2111) 29
• Food manufacturing (NAICS 3111) 29
• Primary metal manufacturing (NAICS 3313) 24
• Wood product manufacturing (NAICS 3212) 22
• Chemical manufacturing (NAICS 3251) 20
• Chemical manufacturing (NAICS 3253) 14
• Wood product manufacturing (NAICS 3211) 13
• Wood product manufacturing (NAICS 3219) 12
• Fabricated metal product manufacturing (NAICS 3324) 12
• Warehousing and storage (NAICS 4931) 6
• Nonmetallic mineral product manufacturing (NAICS 3279) 6
• Mining support (NAICS 2131) 3
• Waste management and remediation (NAICS 5622) 3
• Space research and technology (NAICS 9271) 3
• Transportation equipment manufacturing (NAICS 3361) 3

Air-emissions stack tests recorded in Mississippi, 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.

What this page shows

This page covers Clean Air Act facilities in the EPA air register with stack tests in MS for NAICS industry 3399 in 2025. It lists 4 stack tests recorded in 2025.