EPA EXPORT · 13 SEP 2026FEDERAL COMPLIANCE RECORDS · NOT A HOME WATER TEST
TAP WATERLEDGERPublic system compliance records

COUNTY WATER-SYSTEM LEDGER

Johnson, Kansas

Compare active community water systems serving this county in EPA's public export. Systems can serve multiple places, so population totals may overlap.

Systems5active CWS · pop. 2,500+
Population served668,058reported total; may overlap
Current violation flag20.0%1 systems
Serious-violator flag0.0%0 systems

01 / SYSTEMS

Water systems serving Johnson

Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.

Water systemPopulation servedPrimary sourceCurrent export status
Water District 1 Of Johnson CoKS2009110490,000Surface waterNo current violation flagged
Olathe, City OfKS2009115143,014Surface waterNo current violation flagged
Gardner, City OfKS200910623,942Surface waterNo current violation flagged
Johnson Co Rwd 7KS20091046,457Surface water purchasedNo current violation flagged
Desoto, City OfKS20091024,645Ground waterCurrent health-based flag

02 / SOURCE MIX

Surface water3 systems · 656,956 served
Surface water purchased1 systems · 6,457 served
Ground water1 systems · 4,645 served
How to read the population total

It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.