Public water system · MO1010802
ActiveUnion Star Pws
At a glance
Union Star Pws (PWSID MO1010802) is an active community water system in DeKalb County, Missouri. It reports serving 386 people through 174 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
386
Service connections
174
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Union Star Pws compare with other water systems in DeKalb County?
By EPA's size categories, Union Star Pws is a very small system (500 people or fewer). DeKalb County has 6 active public water systems, and Union Star Pws is the 5th-largest of them by population served. Its population served is well below the county average of 1,783 people per system, and accounts for 3.6% of the 10,695 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 Union Star Pws 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. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 177 Missouri systems (6%) list purchased groundwater as their primary source.
Who owns and regulates Union Star Pws?
EPA lists Union Star 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. 5 of the 6 active systems in DeKalb County (83%) are also owned by a local government.
Does Union Star Pws have drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2025. The violations listed here began between June 1995 and July 2025. By type: 7 monitoring and reporting, 1 reporting, 1 monitoring and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (6 of them). EPA lists 9 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 |
| 2022-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2007-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2007-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2004-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2003-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 10 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.
Union Star Pws: frequently asked questions
Who runs Union Star Pws?
Union Star Pws (PWSID MO1010802) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Union Star Pws serve?
Union Star Pws reports serving 386 people through 174 service connections in DeKalb County, Missouri.
Where does Union Star Pws get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Union Star Pws have any drinking water violations?
EPA's records list 10 violations for this system; none is 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 Union Star 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 10 violations for this system; none is 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 Union Star Pws' water quality report?
As a community water system, Union Star 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 DeKalb County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dekalb County Pwsd 1 | DeKalb | 7,635 | Community | Purchased groundwater |
| Maysville Pws | DeKalb | 1,096 | Community | Purchased groundwater |
| Mo American Stewartsville | DeKalb | 928 | Community | Purchased groundwater |
| Osborn Pws | DeKalb | 405 | Community | Purchased groundwater |
| Clarksdale Pws | DeKalb | 245 | Community | Purchased 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, “Union Star Pws, PWSID MO1010802, Missouri”, https://aquacensus.com/water-systems/missouri/union-star-pws-mo1010802 (data as of October 1, 2026).