Posey County, IN
The federal environmental record for Posey County (population 25,040): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
1
federal cleanup sites
1
PFAS-detecting water systems
9
TRI facilities
7
open tank releases
Drinking water: PFAS testing
Public water systems serving Posey 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 |
|---|---|---|
| MOUNT VERNON WATER WORKS IN5265006 | PFPeA: 17.4 ng/L HFPO-DA: 5.3 ng/L PFOA: 4 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
9 facilities in Posey filed TRI reports for 2024, totalling 3.4M lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| SABIC INNOVATIVE PLASTICS MT. VERNON LLC | MOUNT VERNON | Sodium nitrite, 4,4'-Isopropylidenediphenol | 2.8M lb |
| CONSOLIDATED GRAIN & BARGE CO | MOUNT VERNON | n-Hexane | 440k lb |
| COUNTRYMARK REFINING & LOGISTICS LLC | MOUNT VERNON | Hydrogen cyanide, n-Hexane | 97k lb |
| VALERO RENEWABLE FUELS-MOUNT VERNON | MOUNT VERNON | n-Hexane, Acetaldehyde | 22k lb |
| GREEN PLAINS MOUNT VERNON LLC | MOUNT VERNON | Acetaldehyde, Formic acid | 11k lb |
| BUILDING MATERIALS MANUFACTURING LLC | MOUNT VERNON | Polycyclic aromatic compounds, Copper compounds | 6k lb |
| MPLX TERMINALS LLC - MT VERNON LP TERMINAL | MOUNT VERNON | n-Hexane, Toluene | 3k lb |
| BWXT NUCLEAR OPERATIONS GROUP | MOUNT VERNON | Nickel, Chromium | 2k lb |
| ADM MILLING CO | MOUNT VERNON | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 93 tank facilities in Posey: 48 tanks in service and 192 closed. 38 fuel releases are on record, of which 7 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Posey as Zone 2, moderate predicted indoor radon (2 to 4 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 Posey, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- MCCARTY'S BALD KNOB LANDFILLMOUNT VERNON