EPA Air · by county
Air-emissions sources in Hancock County, Mississippi
- 14Facilities
Every stationary source in Hancock 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 Hancock County
Each of the 13 operating major, synthetic minor and minor sources in Hancock County, Mississippi has a record page: every source in Hancock County, A to Z.
By emissions classification in Hancock 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 Hancock 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.
- 2026 inspections 5
- 2024 inspections 9
- 2023 inspections 3
- 2022 inspections 8
- 2020 inspections 7
- 2019 inspections 3
- 2018 inspections 7
- 2017 inspections 3
Violations in Hancock County, by year
A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity.
Stack tests in Hancock County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 34
- 2025 stack tests 3
- 2024 stack tests 44
- 2023 stack tests 14
- 2022 stack tests 5
- 2021 stack tests 23
- 2020 stack tests 28
- 2018 stack tests 7
- 2017 stack tests 15
Inspections in Hancock County, year by year · Violations in Hancock County, year by year · Stack tests in Hancock County, year by year
Other counties in Mississippi
Every county in the state with at least three sources on file.
- Clarke County 12
- Clay County 7
- Coahoma County 8
- Copiah County 11
- Covington County 20
- DeSoto County 21
- Forrest County 24
- Franklin County 3
- George County 5
- Grenada County 15
- Harrison County 30
- Hinds County 77
- Holmes County 3
- Humphreys County 4
- Issaquena County 3
- Itawamba County 10
- Jackson County 28
- Jasper County 17
- Jefferson County 3
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| ALPEK POLYESTER MISSISSIPPI INC | Major source | Yes |
| CALGON CARBON CORPORATION | Major source | No |
| EMBERCLEAR GTL LLC, PORT BIENVILLE GAS TO GASOLINE | Synthetic minor source | No |
| GULF SOUTH PIPELINE COMPANY LLC, KILN COMPRESSOR STATION | Major source | No |
| JINDAL TUBULAR USA LLC | Synthetic minor source | No |
| NASA SHARED SERVICE CENTER, NCCIPS | Major source | No |
| NASA, STENNIS SPACE CENTER, AREA 9 | Minor source | No |
| NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER | Major source | No |
| POLYCHEMIE INC | Synthetic minor source | No |
| RELATIVITY SPACE INC | Minor source | No |
| ROLLS ROYCE NORTH AMERICA INC, ROLLS ROYCE OUTDOOR TEST FACILITY | Major source | No |
| SABIC INNOVATIVE PLASTICS US, LLC | Major source | No |
| TENNESSEE GAS PIPELINE COMPANY LLC, BAY ST LOUIS COMPRESSOR STATION NUMBER 530 | Major source | No |
| UNITED STATES NAVAL OCEANOGRAPHIC OFFICE | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.