Public water system · MO6031209
ActiveSt Charles Co Pwsd 2 - Sumac Ridge
At a glance
St Charles Co Pwsd 2 - Sumac Ridge (PWSID MO6031209) is an active community water system in St. Charles County, Missouri. It reports serving 103 people through 37 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
103
Service connections
37
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does St Charles Co Pwsd 2 - Sumac Ridge compare with other water systems in St. Charles County?
By EPA's size categories, St Charles Co Pwsd 2 - Sumac Ridge is a very small system (500 people or fewer). St. Charles County has 54 active public water systems. Its population served is well below the county average of 5,867 people per system, and accounts for less than 0.1% of the 316,837 people reported by systems filed under the county. Across Missouri, the 2,943 active systems average 2,049 people each. Nationally, the average active community water system reports serving 6,703 people, so St Charles Co Pwsd 2 - Sumac Ridge is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Missouri has 1,612 active community water systems, 55% of the state's 2,943 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,521 Missouri systems (86%) list groundwater as their primary source.
Who owns and regulates St Charles Co Pwsd 2 - Sumac Ridge?
EPA lists St Charles Co Pwsd 2 - Sumac Ridge as privately owned. The MO state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 33 of the 54 active systems in St. Charles County (61%) are also privately owned.
Does St Charles Co Pwsd 2 - Sumac Ridge have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2024. The violations listed here began between February 2000 and October 2024. By type: 3 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Lead and Copper Rule, E. coli, Consumer Confidence Rule and Total coliform bacteria (TCR). EPA lists 3 as resolved and 1 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2015-09-01 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2001-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2000-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 4 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
St Charles Co Pwsd 2 - Sumac Ridge: frequently asked questions
Who runs St Charles Co Pwsd 2 - Sumac Ridge?
St Charles Co Pwsd 2 - Sumac Ridge (PWSID MO6031209) is a community water system privately owned. It is regulated by the MO state drinking water program.
How many people does St Charles Co Pwsd 2 - Sumac Ridge serve?
St Charles Co Pwsd 2 - Sumac Ridge reports serving 103 people through 37 service connections in St. Charles County, Missouri.
Where does St Charles Co Pwsd 2 - Sumac Ridge get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does St Charles Co Pwsd 2 - Sumac Ridge have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is St Charles Co Pwsd 2 - Sumac Ridge's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 4 violations for this system; none is health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find St Charles Co Pwsd 2 - Sumac Ridge's water quality report?
As a community water system, St Charles Co Pwsd 2 - Sumac Ridge must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in St. Charles County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| St Charles County Pwsd 2 | St. Charles | 100,587 | Community | Purchased surface water |
| St Charles Pws | St. Charles | 78,961 | Community | Purchased surface water |
| St Peters Pws | St. Charles | 52,575 | Community | Purchased surface water |
| Wentzville Pws | St. Charles | 41,784 | Community | Groundwater |
| Ofallon Pws | St. Charles | 32,515 | Community | Purchased surface water |
| St Paul Pws | St. Charles | 1,700 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “St Charles Co Pwsd 2 - Sumac Ridge, PWSID MO6031209, Missouri”, https://aquacensus.com/water-systems/missouri/st-charles-co-pwsd-2-sumac-ridge-mo6031209 (data as of October 1, 2026).