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States / Kansas

Johnson County, KS

The federal environmental record for Johnson County (population 622,237): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.

2

Superfund NPL sites

11

federal cleanup sites

5

PFAS-detecting water systems

26

TRI facilities

56

open tank releases

Superfund NPL sites

SiteCityStatusListed
Chemical Commodities, Inc.Olatheon the NPL05/31/1994
Doepke Disposal (Holliday)Johnson Countyon the NPL09/08/1983

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.

SystemHighest resultsReading
DESOTO, CITY OF

KS2009102

PFBS: 3.1 ng/L

detected
JOHNSON CO RWD 7

KS2009104

PFBA: 7.1 ng/L

detected
GARDNER, CITY OF

KS2009106

PFPeA: 3.4 ng/L

detected
WATER DISTRICT 1 OF JOHNSON CO

KS2009110

PFBA: 5.3 ng/L

detected
SPRING HILL, CITY OF

KS2009120

PFBA: 6.9 ng/L

detected

On a system with detections? Testing and treatment options

Facilities reporting toxic releases (2024)

26 facilities in Johnson filed TRI reports for 2024, totalling 22k lb released. The 25 largest by volume:

FacilityCityTop chemicalsTotal released
UNIVERSAL ENGRAVING INCOVERLAND PARKCopper18k lb
NAZDAR SHAWNEESHAWNEECertain glycol ethers1k lb
CENTURY CONCRETE INC OLATHE FACILITYOLATHENitrate compounds (water dissociable; reportable only when in aqueous solution), Lead And Lead Compounds1k lb
SPX COOLING TECHNOLOGIESOLATHEChromium, Nickel723 lb
VITA CRAFT CORPSHAWNEEChromium553 lb
EXXONMOBIL OLATHE GREASE PLANTOLATHEDiisocyanates148 lb
ARROW MATERIAL HANDLINGLENEXAManganese88 lb
AUDUBON READYMIX LLC DBA QUICKSILVER READYMIX - OLATHEOLATHENitrate compounds (water dissociable; reportable only when in aqueous solution), Lead compounds51 lb
KOCHER + BECK USA LPLENEXAChlorine10 lb
GEIGER READY MIXOLATHELead, Mercury5 lb
CARDINAL FGSPRING HILLNitric acid5 lb
ARGENTA US MANUFACTURING LLC.SHAWNEE1,2,4-Trimethylbenzene5 lb
PENNYS CONCRETESHAWNEELead4 lb
INTERVET INC.DE SOTOMercury And Mercury Compounds4 lb
GARMIN INTERNATIONAL - BUILDING 5OLATHELead2 lb
CONCRETE MATERIALS INCMERRIAMLead2 lb
TOROTEL PRODUCTS INC.OLATHE-0 lb
OLDCASTLE MILLER BONNER SPRINGSBONNER SPRINGSLead0 lb
MAGNUM PRODUCTSLENEXA-0 lb
FORTERRA CONCRETE PRODUCTS - BONNER SPRINGSSHAWNEELead0 lb
OZARK READY MIX KC - OLATHE KANSASOLATHE-0 lb
TRANSCONTINENTAL ROBBIE INCLENEXA-0 lb
WESTLAKE DAVINCI ROOFSCAPES L.L.C.LENEXA-0 lb
ASPHALT SALES COOLATHE-0 lb
HONEYWELL AEROSPACE OLATHEOLATHELead0 lb

Underground fuel tanks

EPA's UST Finder records 656 tank facilities in Johnson: 591 tanks in service and 1,352 closed. 750 fuel releases are on record, of which 56 remain open. Open releases are cleanups that have not reached "no further action".

Radon

EPA maps Johnson as Zone 1, the highest predicted indoor radon levels (over 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

All 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.

  • CHEMICAL COMMODITIES, INC.OLATHE
  • DEFFENBAUGH IND. - JOHNSON CO. LANDFILLSHAWNEE
  • I-435 MYSTERY SPILLLENEXA
  • MERCURY-BAROMETER WEST 147TH STREETOLATHE
  • MERCURY-FLOYD STREETOVERLAND PARK
  • MERCURY-MARSHALL DRIVELENEXA
  • MERCUTY - EARNSHAW STREETSHAWNEE
  • OLATHE (EX) NAVAL AIR STATION UHF BEACONGARDNER
  • RADIATION-METRO THREEMERRIAM
  • REFRIGERANT CYLINDER-123RD STREETOVERLAND PARK
  • SUNFLOWER ARMY AMMUNITION PLANTDESOTO