COUNTY WATER-SYSTEM LEDGER
Johnson, Kansas
EPA’s September 2026 export lists 5 active community water systems serving Johnson, Kansas, with 1 current-violation flags and 0 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving Johnson, Kansas
EPA associates 5 covered systems with Johnson, Kansas; their reported population-served values total 668,058 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Water District 1 Of Johnson CoKS2009110 | 490,000 | Surface water | No current violation flagged |
| Olathe, City OfKS2009115 | 143,014 | Surface water | No current violation flagged |
| Gardner, City OfKS2009106 | 23,942 | Surface water | No current violation flagged |
| Johnson Co Rwd 7KS2009104 | 6,457 | Surface water purchased | No current violation flagged |
| Desoto, City OfKS2009102 | 4,645 | Ground water | Current health-based flag |
02 / SOURCE MIX
Primary water sources for Johnson, Kansas
EPA classifies 5 systems serving Johnson, Kansas across 3 primary-source categories; Surface water is the largest category with 3 systems.
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.