St. John the Baptist Parish, LA
The federal environmental record for St. John the Baptist Parish (population 39,592): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
2
federal cleanup sites
2
PFAS-detecting water systems
11
TRI facilities
6
open tank releases
Drinking water: PFAS testing
Public water systems serving St. John the Baptist 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 |
|---|---|---|
| ST JOHN WATER DISTRICT 2 LA1095002 | PFBA: 5.7 ng/L PFBS: 3.7 ng/L | detected |
| ST JOHN WATER DISTRICT 1 LA1095003 | PFBA: 6 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
11 facilities in St. John the Baptist filed TRI reports for 2024, totalling 2.1M lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| DUPONT PONTCHARTRAIN WORKS | LA PLACE | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia | 1.1M lb |
| MARATHON PETROLEUM CO LP | GARYVILLE | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Hydrogen cyanide | 849k lb |
| PINNACLE POLYMERS | GARYVILLE | Propylene, Ethylene | 98k lb |
| DENKA PERFORMANCE ELASTOMER LLC | LA PLACE | Chloroprene, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 71k lb |
| EVONIK CORP | RESERVE | Ethylene glycol, Methyl isobutyl ketone | 20k lb |
| MT. AIRY TERMINAL LLC | MOUNT AIRY | Xylene (mixed isomers), Toluene | 9k lb |
| NALCO CO | GARYVILLE | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Copper And Copper Compounds | 8k lb |
| STOCKHAUSEN SUPERABSORBER LLC | GARYVILLE | Acrylic acid | 5k lb |
| CLARIANT CORPORATION - RESERVE SITE | RESERVE | Toluene, Methanol | 4k lb |
| AIR PRODUCTS & CHEMICALS INC - GARYVILLE SMR | GARYVILLE | Methanol | 138 lb |
| PVS DX INC. | RESERVE | Chlorine | 127 lb |
Underground fuel tanks
EPA's UST Finder records 122 tank facilities in St. John the Baptist: 96 tanks in service and 249 closed. 45 fuel releases are on record, of which 6 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps St. John the Baptist 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 St. John the Baptist, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- CAMBRIDGE PLACE EASTLA PLACE
- FILTER MEDIARESERVE