MERCER PWS
PWSID: MO2010515 · Mercer, MO · Serves 318 people
According to EPA Safe Drinking Water Information System (SDWIS), MERCER PWS (PWSID MO2010515) in Mercer, MO is listed as a CWS water system covering about 318 people. The same extract lists 23 health-based violation records spanning 2016-2025. Those 23 health-based rows for MERCER PWS cover contaminants such as TTHM; they remain historical EPA registry entries, not a current compliance or drinkability score.
MERCER PWS has 23 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 1 distinct EPA contaminant code appears in this system's record, including TTHM. Recorded violations span 2016–2025. Day-to-day primacy enforcement for this system runs through the Missouri drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Missouri state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- MO2010515
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Mercer, MO
- Population Served
- 318
- Health Violations
- Yes (23)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| TTHM | 23 | 23 |
Violation History (23)
| Contaminant | Health | Date |
|---|---|---|
| TTHM | Yes | Oct 1, 2025 |
| TTHM | Yes | Jul 1, 2025 |
| TTHM | Yes | Jul 1, 2025 |
| TTHM | Yes | Apr 1, 2025 |
| TTHM | Yes | Apr 1, 2025 |
| TTHM | Yes | Oct 1, 2024 |
| TTHM | Yes | Oct 1, 2024 |
| TTHM | Yes | Oct 1, 2024 |
| TTHM | Yes | Oct 1, 2024 |
| TTHM | Yes | Jul 1, 2024 |
| TTHM | Yes | Jul 1, 2024 |
| TTHM | Yes | Jul 1, 2024 |
| TTHM | Yes | Jul 1, 2024 |
| TTHM | Yes | Apr 1, 2024 |
| TTHM | Yes | Apr 1, 2024 |
| TTHM | Yes | Apr 1, 2024 |
| TTHM | Yes | Apr 1, 2024 |
| TTHM | Yes | Apr 1, 2024 |
| TTHM | Yes | Oct 1, 2020 |
| TTHM | Yes | Jul 1, 2020 |
| TTHM | Yes | Apr 1, 2020 |
| TTHM | Yes | Jul 1, 2019 |
| TTHM | Yes | Apr 1, 2016 |
Frequently Asked Questions
What does EPA SDWIS list for MERCER PWS?
How many people does MERCER PWS serve?
What violations does MERCER PWS have?
What contaminants have been found in MERCER PWS water?
Compare beyond Missouri
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest MERCER PWS on cumulative violation count (23) and EPA-reported population served (318). Violation-count peers include BETHEL-CITY S/D WATER, HOLLY GROVE WATERWORKS, DELIGHT WATERWORKS.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Nearby Water Systems
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About This Data
MERCER PWS (MO2010515) is drawn from EPA SDWIS. Nearby county systems in this extract include MERCER COUNTY PWSD 1; PRINCETON PWS; CAINSVILLE PWS. Health-based rows (23 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.