MARYVILLE PWS
PWSID: MO1010508 · Maryville, MO · Serves 10,775 people
According to EPA Safe Drinking Water Information System (SDWIS), MARYVILLE PWS (PWSID MO1010508) in Maryville, MO is listed as a CWS water system covering about 10,775 people. The same extract lists 10 health-based violation records spanning 2022-2025. Those 10 health-based rows for MARYVILLE PWS cover contaminants such as Chlorite, Long Term 2 Enhanced Surface Water Treatment Rule, Interim Enhanced Surface Water Treatment Rule; they remain historical EPA registry entries, not a current compliance or drinkability score.
MARYVILLE PWS has 10 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. 4 distinct EPA contaminant codes appear in this system's record, including Chlorite, Long Term 2 Enhanced Surface Water Treatment Rule, Interim Enhanced Surface Water Treatment Rule. Recorded violations span 2022–2025. 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)
- MO1010508
- System Type
- CWS
- Water Source
- Surface Water
- Location
- Maryville, MO
- Population Served
- 10,775
- Health Violations
- Yes (10)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Chlorite | 6 | 6 |
| Long Term 2 Enhanced Surface Water Treatment Rule | 2 | 2 |
| Interim Enhanced Surface Water Treatment Rule | 1 | 1 |
| Groundwater Rule | 1 | 1 |
Violation History (10)
| Contaminant | Health | Date |
|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | Yes | Dec 1, 2025 |
| Chlorite | Yes | Mar 1, 2024 |
| Chlorite | Yes | Mar 1, 2024 |
| Chlorite | Yes | Mar 1, 2024 |
| Chlorite | Yes | Feb 1, 2024 |
| Chlorite | Yes | Feb 1, 2024 |
| Chlorite | Yes | Feb 1, 2024 |
| Long Term 2 Enhanced Surface Water Treatment Rule | Yes | Dec 27, 2022 |
| Groundwater Rule | Yes | Dec 27, 2022 |
| Long Term 2 Enhanced Surface Water Treatment Rule | Yes | Dec 27, 2022 |
Frequently Asked Questions
What does EPA SDWIS list for MARYVILLE PWS?
How many people does MARYVILLE PWS serve?
What violations does MARYVILLE PWS have?
What contaminants have been found in MARYVILLE PWS water?
Compare beyond Missouri
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest MARYVILLE PWS on cumulative violation count (10) and EPA-reported population served (10,775). Violation-count peers include ETHETE WATER SYSTEM, Quechan Utility, Grand Canyon West. Population peers include BRIDGEPORT CITY OF, LONGPORT WATER DEPARTMENT, MONROE WATERWORKS.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
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About This Data
MARYVILLE PWS (MO1010508) is drawn from EPA SDWIS. Nearby county systems in this extract include NODAWAY COUNTY PWSD 1; BURLINGTON JUNCTION PWS; HOPKINS PWS; RAVENWOOD PWS. Health-based rows (10 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.