Public water system · MO6010198
ActiveCrystal City Pws
At a glance
Crystal City Pws (PWSID MO6010198) is an active community water system in Jefferson County, Missouri. It reports serving 4,733 people through 2,056 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; 3 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,733
Service connections
2,056
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Crystal City Pws compare with other water systems in Jefferson County?
By EPA's size categories, Crystal City Pws is a medium system (3,301 to 10,000 people). Jefferson County has 92 active public water systems. Its population served is about 133% above the county average of 2,034 people per system, and accounts for 2.5% of the 187,106 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 Crystal City Pws is about 29% 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 Crystal City Pws?
EPA lists Crystal City 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. 26 of the 92 active systems in Jefferson County (28%) are also owned by a local government.
Does Crystal City Pws have drinking water violations?
EPA's records list 8 violations for this system; 3 are health-based, and the most recent began in July 2025. The violations listed here began between October 1994 and July 2025. By type: 3 contaminant level above the legal limit, 3 monitoring and reporting, 1 reporting and 1 monitoring. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (3 of them). EPA lists 7 as resolved and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2022-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2022-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2022-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2020-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1994-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 8 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.
Crystal City Pws: frequently asked questions
Who runs Crystal City Pws?
Crystal City Pws (PWSID MO6010198) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Crystal City Pws serve?
Crystal City Pws reports serving 4,733 people through 2,056 service connections in Jefferson County, Missouri.
Where does Crystal City Pws 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 Crystal City Pws have any drinking water violations?
EPA's records list 8 violations for this system; 3 are health-based, and the most recent began in July 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 Crystal City 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 8 violations for this system; 3 are health-based, and the most recent began in July 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 Crystal City Pws' water quality report?
As a community water system, Crystal City 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 Jefferson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Jefferson Co Cons Pwsd C 1 | Jefferson | 37,000 | Community | Purchased surface water |
| Jefferson County Pwsd 1 | Jefferson | 21,113 | Community | Purchased surface water |
| Jefferson County Pwsd 3 | Jefferson | 17,000 | Community | Purchased surface water |
| Jefferson County Pwsd 2 | Jefferson | 16,548 | Community | Surface water |
| Festus Pws | Jefferson | 13,000 | Community | Purchased groundwater under influence |
| Jefferson County Pwsd 10 | Jefferson | 10,000 | Community | Purchased surface water |
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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, “Crystal City Pws, PWSID MO6010198, Missouri”, https://aquacensus.com/water-systems/missouri/crystal-city-pws-mo6010198 (data as of October 1, 2026).