MERCER, MO · Mercer County
MERCER PWS Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Missouri’s official records. Always confirm current status with Missouri before making decisions based on this information.
System facts
- System ID (PWSID)
- MO2010515
- System type
- Community Water System
- Population served
- 318
- Service connections
- 186
- Ownership
- local government
- Water source
- groundwater (wells)
Violation history
Maximum Contaminant Level Violation, Average
Health-basedTTHM
October 1, 2024 – December 31, 2024
ResolvedMaximum Contaminant Level Violation, Average
Health-basedTTHM
April 1, 2024 – June 30, 2024
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
July 1, 2023 – September 30, 2023
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
February 1, 2021 – February 10, 2021
ResolvedMaximum Contaminant Level Violation, Average
Health-basedTTHM
July 1, 2020 – September 30, 2020
ResolvedMaximum Contaminant Level Violation, Average
Health-basedTTHM
April 1, 2020 – June 30, 2020
ResolvedMaximum Contaminant Level Violation, Average
Health-basedTTHM
April 1, 2016 – June 30, 2016
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
October 1, 2012 – October 31, 2012
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
October 1, 2008 – October 31, 2008
ResolvedInitial Tap Sampling for Pb and Cu
—Lead and Copper Rule
January 1, 1995 – December 31, 1994
ResolvedTreatment Technique (SWTR and GWR)
Health-basedSurface Water Treatment Rule
December 1, 1993 – December 31, 1993
ResolvedTreatment Technique (SWTR and GWR)
Health-basedSurface Water Treatment Rule
August 1, 1993 – August 31, 1993
ResolvedTreatment Technique (SWTR and GWR)
Health-basedSurface Water Treatment Rule
July 1, 1993 – July 31, 1993
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 1, 2024 – December 31, 2024 | Maximum Contaminant Level Violation, Average | TTHM | Health-based | Resolved |
| April 1, 2024 – June 30, 2024 | Maximum Contaminant Level Violation, Average | TTHM | Health-based | Resolved |
| July 1, 2023 – September 30, 2023 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| February 1, 2021 – February 10, 2021 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| July 1, 2020 – September 30, 2020 | Maximum Contaminant Level Violation, Average | TTHM | Health-based | Resolved |
| April 1, 2020 – June 30, 2020 | Maximum Contaminant Level Violation, Average | TTHM | Health-based | Resolved |
| April 1, 2016 – June 30, 2016 | Maximum Contaminant Level Violation, Average | TTHM | Health-based | Resolved |
| October 1, 2012 – October 31, 2012 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| October 1, 2008 – October 31, 2008 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 1995 – December 31, 1994 | Initial Tap Sampling for Pb and Cu | Lead and Copper Rule | — | Resolved |
| December 1, 1993 – December 31, 1993 | Treatment Technique (SWTR and GWR) | Surface Water Treatment Rule | Health-based | Resolved |
| August 1, 1993 – August 31, 1993 | Treatment Technique (SWTR and GWR) | Surface Water Treatment Rule | Health-based | Resolved |
| July 1, 1993 – July 31, 1993 | Treatment Technique (SWTR and GWR) | Surface Water Treatment Rule | Health-based | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- September 23, 2016State Public Notification received548 linked violations
Contact
MEINECKE, TRACY
660-382-4210
MERCER, MO 64661-0000