Public water system · MO1010880
ActiveLake Winnebago Pws
At a glance
Lake Winnebago Pws (PWSID MO1010880) is an active community water system in Cass County, Missouri. It reports serving 1,600 people through 739 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; none is health-based, and the most recent began in July 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,600
Service connections
739
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Lake Winnebago Pws compare with other water systems in Cass County?
By EPA's size categories, Lake Winnebago Pws is a small system (501 to 3,300 people). Cass County has 31 active public water systems. Its population served is well below the county average of 21,480 people per system, and accounts for 0.2% of the 665,874 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 Lake Winnebago 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 Lake Winnebago Pws?
EPA lists Lake Winnebago 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. 24 of the 31 active systems in Cass County (77%) are also owned by a local government.
Does Lake Winnebago Pws have drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in July 2016. The violations listed here began between April 1992 and July 2016. By type: 6 monitoring and 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 8 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 |
|---|---|---|---|---|
| 2016-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2006-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2001-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1992-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1992-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | 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.
Lake Winnebago Pws: frequently asked questions
Who runs Lake Winnebago Pws?
Lake Winnebago Pws (PWSID MO1010880) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Lake Winnebago Pws serve?
Lake Winnebago Pws reports serving 1,600 people through 739 service connections in Cass County, Missouri.
Where does Lake Winnebago 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 Lake Winnebago Pws have any drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in July 2016. 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 Lake Winnebago 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; none is health-based, and the most recent began in July 2016. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find Lake Winnebago Pws' water quality report?
As a community water system, Lake Winnebago 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 Cass County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kansas City Pws | Cass + 4 more | 553,295 | Community | Surface water |
| Belton Pws | Cass | 23,598 | Community | Purchased surface water |
| Raymore Pws | Cass | 21,517 | Community | Purchased surface water |
| Harrisonville Pws | Cass | 10,019 | Community | Surface water |
| Pleasant Hill Pws | Cass | 8,262 | Community | Purchased surface water |
| Peculiar Pws | Cass | 6,226 | 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, “Lake Winnebago Pws, PWSID MO1010880, Missouri”, https://aquacensus.com/water-systems/missouri/lake-winnebago-pws-mo1010880 (data as of October 1, 2026).