Selenium violations in Missouri
21 active public water systems in Missouri had a Selenium violation in the past three years, 2 of them still unresolved. What Selenium is and why it matters.
Systems with a Selenium violation
Unresolved first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Osage CO Pwsd 1 Bonnots Mill, Loose Creek · Osage County |
1,221 | 3 | 0 | |
|
Clarkton PWS Clarkton · Dunklin County |
1,124 | 7 | 0 | |
|
Senath PWS Senath · Dunklin County |
1,767 | 9 | 0 | |
|
Lilbourn PWS Lilbourn · New Madrid County |
902 | 8 | 0 | |
|
Martinsburg PWS Martinsburg · Audrain County |
559 | 8 | 0 | |
|
Nestle Purina Petcare Company Bloomfield · Stoddard County |
525 | 4 | 0 | |
|
General Council Assemblies of God Springfield · Greene County |
500 | 5 | 0 | |
|
Community Water System Wappapello · Wayne County |
378 | 4 | 0 | |
|
Fisk PWS Fisk · Butler County |
342 | 8 | 0 | |
|
Killarney Shores Subd Ironton · Iron County |
203 | 7 | 1 | |
|
Mill Spring PWS Mill Spring · Wayne County |
112 | 8 | 0 | |
|
Streamline the Oaks Crawford County |
98 | 7 | 1 | |
|
Whiteside Hidden Acres Hickory County |
92 | 9 | 3 | |
|
Riviera South Water Corp Pittsburg · Hickory County |
90 | 5 | 0 | |
|
Fennec Fox Way LLC Jefferson County |
70 | 7 | 1 | |
|
Charity PWS Pulaski County |
55 | 9 | 3 | |
|
Warrens Oakland Park Stone County |
52 | 3 | 0 | |
|
Rolling Hills PWS Pulaski County |
48 | 8 | 3 | |
|
Isonova Technologies LLC Lawrence County |
39 | 6 | 0 | |
|
Crestview MHP Pettis County |
35 | 11 | 3 | |
|
Eagles Landing Subdivision Association Miller County |
25 | 3 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Selenium, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Selenium 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. Retrieved from ECHO on Oct 11, 2026.