Public water system · MO3010728
ActiveSedalia Pws
At a glance
Sedalia Pws (PWSID MO3010728) is an active community water system in Pettis County, Missouri. It reports serving 21,725 people through 10,912 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
21,725
Service connections
10,912
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sedalia Pws compare with other water systems in Pettis County?
By EPA's size categories, Sedalia Pws is a large system (10,001 to 100,000 people). Pettis County has 30 active public water systems, and Sedalia Pws is the largest of them by population served. Its population served is about 23 times the county average of 950 people per system, and accounts for 76% of the 28,494 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 Sedalia Pws is about 3.2 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. 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 Sedalia Pws?
EPA lists Sedalia 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 30 active systems in Pettis County (17%) are also owned by a local government.
Does Sedalia Pws have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2026. The violations listed here began between July 1988 and January 2026. By type: 7 monitoring and reporting, 2 reporting, 2 public notice, recordkeeping or other and 1 required treatment not met. The contaminant or rule involved most often is 1,1,1-Trichloroethane (2 of them). EPA lists 10 as resolved and 2 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 |
|---|---|---|---|---|
| 2026-01-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Unaddressed |
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-05-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2007-10-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
The 12 most recent 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.
Sedalia Pws: frequently asked questions
Who runs Sedalia Pws?
Sedalia Pws (PWSID MO3010728) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Sedalia Pws serve?
Sedalia Pws reports serving 21,725 people through 10,912 service connections in Pettis County, Missouri.
Where does Sedalia 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 Sedalia Pws have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2026. 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 Sedalia 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. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find Sedalia Pws' water quality report?
As a community water system, Sedalia 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 Pettis County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tyson Poultry Inc. | Pettis | 1,400 | Non-transient non-community | Groundwater |
| La Monte Pws | Pettis | 1,120 | Community | Groundwater |
| Mo American Maplewood Subdivision | Pettis | 1,008 | Community | Groundwater |
| Green Ridge Pws | Pettis | 595 | Community | Groundwater |
| Mo American Smithton | Pettis | 563 | Community | Groundwater |
| Southgate Subdivision | Pettis | 216 | 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, “Sedalia Pws, PWSID MO3010728, Missouri”, https://aquacensus.com/water-systems/missouri/sedalia-pws-mo3010728 (data as of October 1, 2026).