Kansas water quality
Kansas has 1,038 active public water systems (1,802 on file total), 846 of them graded by TapGraded.
Grade distribution
Biggest water systems
WATER DISTRICT 1 OF JOHNSON CO
KANSAS CITY, KS · 490,000 served
WICHITA, CITY OF
WICHITA, KS · 395,699 served
KANSAS CITY BOARD OF PUBLIC UTILITIES
KANSAS CITY, KS · 152,960 served
OLATHE, CITY OF
OLATHE, KS · 143,014 served
TOPEKA, CITY OF
TOPEKA, KS · 125,963 served
LAWRENCE, CITY OF
LAWRENCE, KS · 95,256 served
MANHATTAN, CITY OF
MANHATTAN, KS · 54,763 served
SALINA, CITY OF
SALINA, KS · 46,481 served
HUTCHINSON, CITY OF
HUTCHINSON, KS · 39,712 served
LEAVENWORTH WATER DEPARTMENT
LEAVENWORTH, KS · 38,757 served
Lowest-graded systems
Active, graded systems serving at least 10,000 people, ordered by lowest Tap Grade first.
JUNCTION CITY, CITY OF
JUNCTION CITY, KS · 19,167 served
GREAT BEND, CITY OF
GREAT BEND, KS · 14,580 served
OLATHE, CITY OF
OLATHE, KS · 143,014 served
FRUSI WATER TREATMENT PLANT
FORT RILEY, KS · 35,784 served
ARKANSAS CITY, CITY OF
ARKANSAS CITY, KS · 11,929 served
EMPORIA, CITY OF
EMPORIA, KS · 24,009 served
KANSAS CITY BOARD OF PUBLIC UTILITIES
KANSAS CITY, KS · 152,960 served
UNIVERSITY OF KANSAS
LAWRENCE, KS · 35,000 served
HUTCHINSON, CITY OF
HUTCHINSON, KS · 39,712 served
OTTAWA, CITY OF
OTTAWA, KS · 12,604 served
Cities in Kansas
Source: EPA SDWIS/ECHO · Data as of 2026Q2