Public water system · MO6010719
ActiveSt Peters Pws
At a glance
St Peters Pws (PWSID MO6010719) is an active community water system in St. Charles County, Missouri. It reports serving 52,575 people through 19,083 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
52,575
Service connections
19,083
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does St Peters Pws compare with other water systems in St. Charles County?
By EPA's size categories, St Peters Pws is a large system (10,001 to 100,000 people). St. Charles County has 54 active public water systems, and St Peters Pws is the 3rd-largest of them by population served. Its population served is about 9 times the county average of 5,867 people per system, and accounts for 17% 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 Peters Pws is about 7.8 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 Peters Pws?
EPA lists St Peters Pws 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 Peters Pws have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2019. By type: 1 public notice, recordkeeping or other. The contaminant or rule involved is Consumer Confidence Rule. EPA lists 1 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 |
|---|---|---|---|---|
| 2019-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
The one violation in EPA's records.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 Peters Pws: frequently asked questions
Who runs St Peters Pws?
St Peters Pws (PWSID MO6010719) 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 Peters Pws serve?
St Peters Pws reports serving 52,575 people through 19,083 service connections in St. Charles County, Missouri.
Where does St Peters Pws 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 Peters Pws have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2019. 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 Peters Pws' 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 one violation for this system; it is not health-based, and the most recent began in July 2019. 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 Peters Pws' water quality report?
As a community water system, St Peters Pws 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 |
| 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 Peters Pws, PWSID MO6010719, Missouri”, https://aquacensus.com/water-systems/missouri/st-peters-pws-mo6010719 (data as of October 1, 2026).