EPA Air · by county
Air-emissions sources in Simpson County, Mississippi
- 5Facilities
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Every stationary source in Simpson County, Mississippi that holds a Clean Air Act permit or is otherwise tracked by an air agency — planned, under construction, operating, seasonal or temporarily closed. Sources EPA records as permanently closed are not listed.
Every source’s record in Simpson County
Each of the 5 operating major, synthetic minor and minor sources in Simpson County, Mississippi has a record page: every source in Simpson County, A to Z.
By emissions classification in Simpson County
A source’s classification is the size band its potential emissions put it in: a major source is large enough to need a Title V operating permit, a synthetic minor has accepted limits to stay below that line, and a minor source sits below it outright.
Inspections in Simpson County, by year
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source.
Stack tests in Simpson County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 28
- 2025 stack tests 18
- 2024 stack tests 32
- 2023 stack tests 18
- 2022 stack tests 44
- 2021 stack tests 18
- 2020 stack tests 16
- 2019 stack tests 34
- 2018 stack tests 4
- 2017 stack tests 6
Inspections in Simpson County, year by year · Stack tests in Simpson County, year by year
Other counties in Mississippi
Every county in the state with at least three sources on file.
- Oktibbeha County 3
- Panola County 10
- Pearl River County 10
- Perry County 7
- Pike County 11
- Pontotoc County 9
- Prentiss County 5
- Rankin County 24
- Scott County 9
- Sharkey County 4
- Smith County 20
- Stone County 5
- Sunflower County 4
- Tate County 23
- Tippah County 11
- Tishomingo County 13
- Tunica County 3
- Undetermined County 42
- Union County 16
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| DENBURY ONSHORE LLC, MARTINVILLE EOR FACILITY | Minor source | No |
| DENBURY ONSHORE LLC, MARTINVILLE WASHFRED CENTRAL FACILITY | Minor source | No |
| ENSTOR GAS, LLC, MISSISSIPPI HUB EXPANSION PROJECT | Major source | Yes |
| GULF SOUTH PIPELINE COMPANY LLC, HARRISVILLE COMPRESSOR STATION | Major source | No |
| TYSON FOODS INC, MAGEE FEEDMILL | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.