Missouri
Jefferson County drinking water quality
98 active public water systems serve 188,323 people in Jefferson County. 27 are compliant, 71 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 2 carry a health flag.
Needs attention
Community water systems
68 systems, largest firstNon-community systems (30: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Grandview R 2 School |
800 | 3 | 0 | |
|
Villa Antonio Winery Hillsboro |
800 | 2 | 0 | |
|
Cedar Springs Elementary School |
560 | 2 | 0 | |
|
Maple Grove Elementary School |
515 | 2 | 0 | |
|
Servgas Fast Mart |
500 | 2 | 1 | |
|
Sunrise R IX Elementary School |
400 | 1 | 0 | |
|
Camp Cedarledge |
300 | 1 | 0 | |
|
Oak Valley Golf Course Resort |
275 | 2 | 0 | |
|
Our Lady Queen of Peace House Springs |
240 | 1 | 0 | |
|
Timber Creek Resort |
200 | 0 | 0 | |
|
River Cement Company |
145 | 4 | 0 | |
|
Friendship Baptist Church Cedar Hill |
100 | 0 | 0 | |
|
Sunnyhill Adventures |
100 | 2 | 0 | |
|
Sana Lake Recovery Center |
75 | 0 | 0 | |
|
House Springs Church of Christ |
55 | 0 | 0 | |
|
Cedar Hill #508 |
50 | 2 | 0 | |
|
Dollar General #13971 Desoto |
50 | 0 | 0 | |
|
Pro Stop |
50 | 1 | 0 | |
|
Teen Challenge of ST Louis |
35 | 2 | 0 | |
|
Wild Sun Winery |
30 | 2 | 1 | |
|
Desoto East Highway Shed |
25 | 4 | 0 | |
|
Dittmer Bp#24 |
25 | 2 | 1 | |
|
Dollar General #21963 Dittmer |
25 | 1 | 1 | |
|
Dollar General #22226 Ware |
25 | 0 | 0 | |
|
Don Robinson State Park |
25 | 0 | 0 | |
|
Hillsboro West Highway Shed |
25 | 4 | 0 | |
|
Jan Phillips Learning Center |
25 | 3 | 1 | |
|
Pine Hollow |
25 | 2 | 0 | |
|
ST Martins Ucc Church |
25 | 3 | 0 | |
|
Yagnadi LLC |
25 | 2 | 1 |
Inactive systems (82, 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.