EPA Air · stack tests by state, industry and year

Couriers and messengers (NAICS 4921): stack tests in Tennessee, 2020

• 20Stack 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 2020 at a Tennessee source whose primary industry code is NAICS 4921. A facility filing more than one industry code is counted under the first one on its record.

Couriers and messengers (NAICS 4921) in Tennessee, other years

• 2023 20
• 2017 20

Other industries in Tennessee, 2020

• Petroleum and coal products manufacturing (NAICS 3241) 20
• Chemical manufacturing (NAICS 3251) 19
• Utilities (NAICS 2211) 18
• Primary metal manufacturing (NAICS 3313) 8
• Waste management and remediation (NAICS 5622) 7
• Chemical manufacturing (NAICS 3259) 7
• Nonmetallic mineral product manufacturing (NAICS 3273) 6
• Pipeline transportation (NAICS 4862) 6
• Paper manufacturing (NAICS 3221) 5
• Primary metal manufacturing (NAICS 3315) 4
• Merchant wholesalers, nondurable goods (NAICS 4247) 3
• Printing and related support (NAICS 3231) 3
• Primary metal manufacturing (NAICS 3311) 3
• Nonmetallic mineral product manufacturing (NAICS 3271) 3

Air-emissions stack tests recorded in Tennessee, 2020

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.