Johnson County, MO
The federal environmental record for Johnson County (population 54,962): 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
1
PFAS-detecting water systems
6
TRI facilities
4
open tank releases
Drinking water: PFAS testing
Public water systems serving Johnson 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 |
|---|---|---|
| LAF JO SALINE COUNTY CONS PWSD 2 MO1024326 | PFBA: 9.5 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
6 facilities in Johnson filed TRI reports for 2024, totalling 8k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| ENERSYS ENERGY PRODUCTS INC ( FORMERLY HAWKER ENERGY) | WARRENSBURG | Methyl methacrylate, Lead And Lead Compounds | 6k lb |
| MASTER MARBLE INC. | HOLDEN | Styrene | 2k lb |
| US DOD USAF WHITEMAN AFB | WHITEMAN AIR FORCE BASE | Toluene, Naphthalene | 328 lb |
| STAHL SPECIALTY CO | KINGSVILLE | Copper, Manganese | 33 lb |
| STAHL SPECIALTY CO | WARRENSBURG | Copper, Manganese | 20 lb |
| ASSOCIATED ELECTRIC COOPERATIVE INC-HOLDEN POWER PLANT | HOLDEN | Naphthalene | 12 lb |
Underground fuel tanks
EPA's UST Finder records 110 tank facilities in Johnson: 50 tanks in service and 217 closed. 73 fuel releases are on record, of which 4 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Johnson 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 Johnson, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- ROSE, MARTHA CHEMICAL COHOLDEN
- WHITEMAN AIR FORCE BASEWHITEMAN AFB