Surface Water Treatment Rule (SWTR) violations in Missouri
21 active public water systems in Missouri had a Surface Water Treatment Rule (SWTR) violation in the past three years. What Surface Water Treatment Rule (SWTR) is and why it matters.
Systems with a Surface Water Treatment Rule (SWTR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Jefferson County Pwsd 2 High Ridge, Murphy, Parkdale · Jefferson County |
16,548 | 2 | 0 | |
|
Neosho PWS Neosho · Newton County |
12,157 | 3 | 0 | |
|
Harrisonville PWS Harrisonville · Cass County |
10,250 | 2 | 0 | |
|
Perryville PWS Perryville · Perry County |
8,555 | 3 | 0 | |
|
Boonville PWS Boonville · Cooper County |
7,964 | 4 | 1 | |
|
Lamar PWS Lamar · Barton County |
4,500 | 2 | 0 | |
|
Bowling Green PWS Bowling Green · Pike County |
4,195 | 3 | 0 | |
|
Louisiana PWS Louisiana · Pike County |
3,244 | 7 | 0 | |
|
Harry S Truman Pwsd 2 Clinton · Henry County |
2,700 | 4 | 0 | |
|
Concordia PWS Concordia · Lafayette County |
2,500 | 6 | 0 | |
|
Piedmont PWS Piedmont · Wayne County |
1,987 | 5 | 0 | |
|
Memphis PWS Memphis · Scotland County |
1,822 | 7 | 0 | |
|
Adrian PWS Adrian · Bates County |
1,635 | 7 | 2 | |
|
Rich Hill PWS Rich Hill · Bates County |
1,400 | 2 | 0 | |
|
Archie PWS Archie · Cass County |
1,300 | 5 | 2 | |
|
Maysville PWS Maysville · DeKalb County |
1,096 | 5 | 0 | |
|
Unity Village Unity Village · Jackson County |
1,000 | 2 | 0 | |
|
S F Scout Ranch St. Francois County |
800 | 4 | 1 | |
|
Bates County Pwsd 2 Amsterdam · Bates County |
752 | 6 | 0 | |
|
Reynolds County Pwsd 1 Lesterville · Reynolds County |
400 | 4 | 0 | |
|
North Central MO Regional Water Com Sullivan County |
25 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Surface Water Treatment Rule (SWTR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Surface Water Treatment Rule (SWTR) alone.
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.