Kansas drinking water quality
Kansas has 956 active public water systems serving 2.9 million people. 648 of them, 68%, had at least one EPA violation in the past three years, 386 have an unresolved violation today, and 47 are designated serious violators by the EPA.
Active systems
956
in 105 counties
People served
2.9M
856 community systems serve 2.9M
Violations, past 3 years
648
68% of active systems
Serious violators
47
15 systems carry a health flag
Largest counties
All 105 countiesLargest community water systems
All 956 systems| System | Serves | Status |
|---|---|---|
| Water District 1 of Johnson CO Johnson County |
490,000 | |
| Wichita, City of Sedgwick County |
395,699 | |
| Kansas City Board of Public Utilities Wyandotte County |
152,960 | |
| Olathe, City of Johnson County |
143,014 | |
| Topeka, City of Shawnee County |
125,963 | |
| Lawrence, City of Douglas County |
95,256 | |
| Manhattan, City of Riley County |
54,763 | |
| Salina, City of Saline County |
46,481 | |
| Hutchinson, City of Reno County |
39,712 | |
| Leavenworth Water Department Leavenworth County |
38,757 |
About the Kansas data
Retrieved from EPA ECHO on Oct 11, 2026.