Marion County, MO
The federal environmental record for Marion County (population 28,336): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
0
federal cleanup sites
2
PFAS-detecting water systems
2
TRI facilities
9
open tank releases
Drinking water: PFAS testing
Public water systems serving Marion 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 |
|---|---|---|
| HANNIBAL PWS MO2010344 | PFBA: 12.4 ng/L | detected |
| MARION COUNTY PWSD 1 MO2024377 | PFBA: 11 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
2 facilities in Marion filed TRI reports for 2024, totalling 223k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| BASF CORP - HANNIBAL SITE | PALMYRA | Nitrate compounds (water dissociable; reportable only when in aqueous solution), o-Xylene | 223k lb |
| AMVAC CHEMICAL CORP | PALMYRA | Hydrogen sulfide, Toluene | 68 lb |
Underground fuel tanks
EPA's UST Finder records 121 tank facilities in Marion: 81 tanks in service and 255 closed. 39 fuel releases are on record, of which 9 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Marion 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 - $39