Harrison County, MS
The federal environmental record for Harrison County (population 210,612): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
12
federal cleanup sites
1
PFAS-detecting water systems
11
TRI facilities
131
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Chemfax, Inc. | Gulfport | on the NPL | 03/15/2012 |
Drinking water: PFAS testing
Public water systems serving Harrison with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| KEESLER AIR FORCE BASE MS0240049 | PFOS: 7.7 ng/L | above final limit |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
11 facilities in Harrison filed TRI reports for 2024, totalling 11.0M lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| CHEMOURS DELISLE PLANT | PASS CHRISTIAN | Manganese compounds, Chromium compounds (except for chromite ore mined in the Transvaal Region) | 10.9M lb |
| HARTSON-KENNEDY INC | GULFPORT | Toluene, Cyclohexane | 40k lb |
| US NAVY CAMP KELLER SMALL ARMS RANGE | BILOXI | Lead | 16k lb |
| AMBIT CHEMICAL TECHNOLOGIES | GULFPORT | Formaldehyde, Methanol | 10k lb |
| US MARINE INC. | GULFPORT | Styrene | 3k lb |
| SEEMANN COMPOSITES LLC | GULFPORT | Styrene | 695 lb |
| GULF SHIP LLC | GULFPORT | Manganese, Chromium | 62 lb |
| SOPREMA INC | GULFPORT | Polycyclic aromatic compounds | 26 lb |
| MMC MATERIALS GULF COAST LLC - GULFPORT | GULFPORT | Lead | 0 lb |
| GULF STATES READY-MIX PLANT 10 | GULFPORT | Lead | 0 lb |
| CRH AMERICAS INC | GULFPORT | Lead | 0 lb |
Underground fuel tanks
EPA's UST Finder records 512 tank facilities in Harrison: 424 tanks in service and 1,100 closed. 279 fuel releases are on record, of which 131 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Harrison as Zone 3, the lowest predicted indoor radon (under 2 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Harrison, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- CHEMFAX RESIN SITEGULFPORT
- CHEMFAX, INC.GULFPORT
- DSI FACILITYBILOXI
- HICKMAN WOOD TREATINGSAUCIER
- HIGHSIDE CHEMICAL CORPORATIONGULFPORT
- J. MCDERMOTT, INC.- 3 RIVERSGULFPORT
- LEMOYNE BLVDD'IBERVILLE
- U.S. FORESTRY SERVICE ACCESS ROADSMCHENRY
- US DOD USAF KEESLER AFBBILOXI
- US NAVY, NAVAL CONSTRUCTION BATTALION CENTERGULFPORT
- VA GULF COAST VETERANS HEALTH CARE SYSTEMSBILOXI
- VA GULF COAST VETERANS HEALTH CARE SYSTEMSBILOXI