State profile · EPA SDWIS + UCMR5
Kansas Drinking Water Quality
957 SDWIS-listed public water systems serve 2,894,673 people across Kansas. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 957
- SDWIS water systems
- 84,344
- Total violations
- 99.1%
- SDWIS systems w/ a violation
- 33%
- UCMR5 PFAS rate (103 tested)
The verdict
99.1% of listed systems carry ≥1 SDWIS violation - upper-third rate (> 96.1%). According to EPA SDWIS population served, Kansas ranks #35 of 66 states and territories by people served through public water systems.
- #35 of 66
- Population · states corpus
- 84,344
- Total EPA violations on record
- 40%
- Health-based (MCL / treatment)
- 99.1%
- SDWIS systems with ≥1 violation
SDWIS violation % and UCMR5 PFAS % use different denominators (full inventory vs tested subset). Population ordinal uses SDWIS population served.
Kansas standing, high SDWIS violation-rate third
Kansas sits in the upper third of jurisdictions by SDWIS violation rate (99.1%), so the system lists below sample one of the denser state-level compliance trails in this extract. Population served is mid-pack at 2,894,673 (mid served population (≤ 5,131,439)). Health-based share is 40% - a material slice is exposure-relevant, with the rest monitoring or reporting. UCMR5 PFAS detection is 33% on the tested subset (mid UCMR5 detection (≤ 35.3%)) - a different denominator from the SDWIS violation rate. Systems listed below are ranked by population served or violation count; pair rate with inventory size before reading exposure scale.
Nationwide similar states
Nearest by SDWIS violation rate
Nearest by population served
Health-based share of this violation record
EPA SDWIS classifications for Kansas's 84,344 recorded violations.
Kansas vs nearest violation-rate peers
Share of SDWIS-listed systems with at least one recorded violation; peers are nearest by absolute rate distance, not a fixed top-seven list.
- KS
Kansas
99.1 % of systems
- KY
Kentucky
99.1 % of systems
- WV
West Virginia
99.5 % of systems
- AL
Alabama
98.6 % of systems
- PR
Puerto Rico
99.6 % of systems
What this shows Kansas's rate is 99.1% (948 of 957 systems; upper-third rate (> 96.1%)). This is a comparison of recorded SDWIS violations, not a measure of current water safety.
Kansas vs all jurisdictions by SDWIS system inventory
Where this state's public water system count sits among every state and territory on PlainWater
957 39th of 66 higher than 27 of 66 jurisdictions
States and territories, banded by SDWIS-listed public water system count
Each bar is a band; taller bars hold more jurisdictions. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS state aggregates · 2026-05-15
Largest Water Systems
Most Violations
Counties in Kansas
Showing top 30 of 105 counties.
Context: Check your water system · methodology · all states
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.