Public water system · MO4010924
ActiveKelso Pws
At a glance
Kelso Pws (PWSID MO4010924) is an active community water system in Scott County, Missouri. It reports serving 586 people through 271 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 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
586
Service connections
271
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Kelso Pws compare with other water systems in Scott County?
By EPA's size categories, Kelso Pws is a small system (501 to 3,300 people). Scott County has 18 active public water systems. Its population served is well below the county average of 1,901 people per system, and accounts for 1.7% of the 34,210 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 Kelso 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. 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 Kelso Pws?
EPA lists Kelso 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. 14 of the 18 active systems in Scott County (78%) are also owned by a local government.
Does Kelso Pws have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2025. The violations listed here began between March 2012 and July 2025. By type: 3 monitoring and reporting, 1 reporting, 1 monitoring and 1 public notice, recordkeeping or other. The contaminants or rules involved are Lead and Copper Rule Revisions, Total trihalomethanes (TTHM), Haloacetic acids (HAA5) and Revised Total Coliform Rule. EPA lists 5 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 |
| 2019-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2018-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2012-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 6 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.
Kelso Pws: frequently asked questions
Who runs Kelso Pws?
Kelso Pws (PWSID MO4010924) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Kelso Pws serve?
Kelso Pws reports serving 586 people through 271 service connections in Scott County, Missouri.
Where does Kelso 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 Kelso Pws have any drinking water violations?
EPA's records list 6 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 Kelso 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 6 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 Kelso Pws' water quality report?
As a community water system, Kelso 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 Scott County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Sikeston Pws | Scott | 16,291 | Community | Groundwater |
| Scott City Pws | Scott | 4,653 | Community | Groundwater |
| Scott County Pwsd 4 | Scott | 3,150 | Community | Groundwater |
| Chaffee Pws | Scott | 3,054 | Community | Groundwater |
| Oran Pws | Scott | 1,294 | Community | Groundwater |
| Miner Pws | Scott | 1,135 | 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, “Kelso Pws, PWSID MO4010924, Missouri”, https://aquacensus.com/water-systems/missouri/kelso-pws-mo4010924 (data as of October 1, 2026).