All water systems in Missouri
2,835 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
ST Robert PWS St. Robert · Pulaski County |
5,192 | 5 | 2 | |
|
Desloge PWS St. Francois County |
5,034 | 3 | 0 | |
|
Herculaneum PWS Herculaneum · Jefferson County |
5,000 | 1 | 0 | |
|
Ashland PWS Ashland · Boone County |
4,999 | 1 | 0 | |
|
Ste Genevieve PWS Ste. Genevieve · Ste. Genevieve County |
4,999 | 3 | 0 | |
|
Clinton CO Pwsd 4 Sys 1 Lathrop · Clinton County |
4,968 | 5 | 2 | |
|
Boone County Pwsd 10 Centralia · Boone County |
4,963 | 0 | 0 | |
|
Clay County Pwsd 6 Kearney · Clay County |
4,912 | 2 | 0 | |
|
Marion County Pwsd 1 Philadelphia · Marion County |
4,900 | 1 | 0 | |
|
Eldon PWS Eldon · Miller County |
4,895 | 4 | 2 | |
|
Higginsville PWS Higginsville · Lafayette County |
4,800 | 1 | 0 | |
|
Mountain Grove PWS Mountain Grove · Wright County |
4,789 | 2 | 0 | |
|
Salem PWS Salem · Dent County |
4,736 | 1 | 0 | |
|
Crystal City PWS Crystal City · Jefferson County |
4,733 | 1 | 1 | |
|
Jefferson CO Pwsd 8 Cedar Hill · Jefferson County |
4,733 | 1 | 1 | |
|
Lexington PWS Lexington · Lafayette County |
4,729 | 2 | 0 | |
|
ST Clair PWS St. Clair · Franklin County |
4,700 | 2 | 1 | |
|
Platte City PWS Platte City · Platte County |
4,691 | 1 | 0 | |
|
Scott City PWS Scott City · Scott County |
4,653 | 3 | 1 | |
|
Cass County Pwsd 2 Belton · Cass County |
4,650 | 1 | 0 | |
|
Mount Vernon PWS Mount Vernon · Lawrence County |
4,575 | 2 | 1 | |
|
Lamar PWS Lamar · Barton County |
4,500 | 2 | 0 | |
|
Moscow Mills PWS Moscow Mills · Lincoln County |
4,500 | 3 | 0 | |
|
North Kansas City PWS N. Kansas City · Clay County |
4,500 | 4 | 1 | |
|
Fredericktown PWS Fredericktown · Madison County |
4,429 | 2 | 1 | |
|
Hollister PWS Hollister · Taney County |
4,426 | 0 | 0 | |
|
California PWS California · Moniteau County |
4,423 | 1 | 0 | |
|
Sullivan County Pwsd 1 Browning · Sullivan County |
4,412 | 0 | 0 | |
|
Dunklin County Pwsd 1 Dunklin County |
4,307 | 3 | 1 | |
|
Johnson County Pwsd 1 Warrensburg · Johnson County |
4,240 | 2 | 0 | |
|
Butler PWS Butler · Bates County |
4,219 | 4 | 0 | |
|
Bowling Green PWS Bowling Green · Pike County |
4,195 | 3 | 0 | |
|
Cass County Pwsd 7 Freeman · Cass County |
4,143 | 0 | 0 | |
|
Brookfield PWS Brookfield · Linn County |
4,111 | 0 | 0 | |
|
Jackson County Pwsd 16 Jackson County |
4,075 | 0 | 0 | |
|
Audrain County Consolidated Pwsd 2 Mexico · Audrain County |
4,062 | 0 | 0 | |
|
Centralia PWS Centralia · Boone County |
4,027 | 0 | 0 | |
|
Pulaski County Pwsd 1 Buckhorn, Laquey · Pulaski County |
4,000 | 1 | 1 | |
|
Camdenton PWS Camdenton · Camden County |
3,960 | 1 | 0 | |
|
Knox County Public Water & Sewer Dist 1 Knox City · Knox County |
3,947 | 4 | 2 | |
|
ST James PWS St. James · Phelps County |
3,935 | 1 | 0 | |
|
Grundy County Pwsd 1 Trenton · Grundy County |
3,900 | 1 | 0 | |
|
Montgomery CO Pwsd 1 Montgomery County |
3,850 | 4 | 2 | |
|
Harrison County Pwsd 2 Bethany · Harrison County |
3,740 | 4 | 0 | |
|
Clinton County Pwsd 3 Caldwell County |
3,722 | 1 | 0 | |
|
Ste Genevieve County Pwsd 1 SC Ste. Genevieve · Ste. Genevieve County |
3,718 | 0 | 0 | |
|
Malden PWS Malden · Dunklin County |
3,700 | 3 | 2 | |
|
Palmyra PWS Palmyra · Marion County |
3,595 | 0 | 0 | |
|
EL Dorado Springs PWS El Dorado Spgs. · Cedar County |
3,593 | 0 | 0 | |
|
Andrew County Pwsd 2 Cosby · Andrew County |
3,580 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
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.