Public water system · MO6024530
ActiveSt Charles County Pwsd 2
At a glance
St Charles County Pwsd 2 (PWSID MO6024530) is an active community water system in St. Charles County, Missouri. It reports serving 100,587 people through 39,978 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in June 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
100,587
Service connections
39,978
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does St Charles County Pwsd 2 compare with other water systems in St. Charles County?
By EPA's size categories, St Charles County Pwsd 2 is a very large system (more than 100,000 people). St. Charles County has 54 active public water systems, and St Charles County Pwsd 2 is the largest of them by population served. Its population served is about 17 times the county average of 5,867 people per system, and accounts for 32% 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 County Pwsd 2 is about 15 times 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 179 Missouri systems (6.1%) list purchased surface water as their primary source.
Who owns and regulates St Charles County Pwsd 2?
EPA lists St Charles County Pwsd 2 as owned by a local government. 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. 20 of the 54 active systems in St. Charles County (37%) are also owned by a local government.
Does St Charles County Pwsd 2 have drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in June 2025. The violations listed here began between December 1996 and June 2025. By type: 2 contaminant level above the legal limit, 1 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 4 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-06-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2021-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2007-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1996-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
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 County Pwsd 2: frequently asked questions
Who runs St Charles County Pwsd 2?
St Charles County Pwsd 2 (PWSID MO6024530) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does St Charles County Pwsd 2 serve?
St Charles County Pwsd 2 reports serving 100,587 people through 39,978 service connections in St. Charles County, Missouri.
Where does St Charles County Pwsd 2 get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does St Charles County Pwsd 2 have any drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in June 2025. 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 County Pwsd 2'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; 2 are health-based, and the most recent began in June 2025. 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 County Pwsd 2's water quality report?
As a community water system, St Charles County Pwsd 2 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 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 |
| Orchard Farm Schools | St. Charles | 1,600 | Non-transient non-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 County Pwsd 2, PWSID MO6024530, Missouri”, https://aquacensus.com/water-systems/missouri/st-charles-county-pwsd-2-mo6024530 (data as of October 1, 2026).