Missouri
Clay County drinking water quality
22 active public water systems serve 678,521 people in Clay County. 7 are compliant, 15 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.
Community water systems
22 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Kansas City PWS Kansas City |
553,295 | 1 | 1 | |
|
Liberty PWS Liberty |
30,800 | 2 | 1 | |
|
Gladstone PWS Gladstone |
27,000 | 1 | 0 | |
|
Kearney PWS Kearney |
11,500 | 0 | 0 | |
|
Excelsior Springs PWS Excelsior Spgs. |
11,084 | 1 | 0 | |
|
Smithville PWS Smithville |
10,885 | 0 | 0 | |
|
Ray County Cons Pwsd 2 Polo, Richmond |
9,360 | 0 | 0 | |
|
Clay County Pwsd 6 Kearney |
4,912 | 2 | 0 | |
|
North Kansas City PWS N. Kansas City |
4,500 | 4 | 1 | |
|
Clay County Pwsd 2 Liberty |
3,485 | 2 | 1 | |
|
Clay County Pwsd 3 Holt |
3,447 | 0 | 0 | |
|
Clay County Pwsd 9 Smithville |
2,465 | 1 | 0 | |
|
Clay County Pwsd 8 Kearney |
2,243 | 1 | 1 | |
|
Clay County Pwsd 5 Liberty |
1,191 | 0 | 0 | |
|
Clay County Pwsd 4 Liberty |
1,032 | 1 | 0 | |
|
Liberty Village MHP |
350 | 0 | 0 | |
|
Missouri City PWS Missouri City |
254 | 1 | 0 | |
|
Clay County Pwsd 7 Excelsior Spgs. |
245 | 2 | 0 | |
|
Birmingham Village of PWS Birmingham |
200 | 2 | 0 | |
|
Prathersville PWS Prathersville |
120 | 0 | 0 | |
|
Mosby PWS Mosby |
93 | 4 | 0 | |
|
Twin Lakes MHP |
60 | 1 | 0 |
Inactive systems (2, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Missouri records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.