Public water system · MN1720008
ActiveWinthrop
At a glance
Winthrop (PWSID MN1720008) is an active community water system in Sibley County, Minnesota. It reports serving 1,330 people through 665 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,330
Service connections
665
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Winthrop compare with other water systems in Sibley County?
By EPA's size categories, Winthrop is a small system (501 to 3,300 people). Sibley County has 20 active public water systems, and Winthrop is the 3rd-largest of them by population served. Its population served is about 173% above the county average of 487 people per system, and accounts for 14% of the 9,745 people reported by systems filed under the county. Across Minnesota, the 6,465 active systems average 820 people each. Nationally, the average active community water system reports serving 6,703 people, so Winthrop 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. Minnesota has 987 active community water systems, 15% of the state's 6,465 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,261 Minnesota systems (97%) list groundwater as their primary source.
Who owns and regulates Winthrop?
EPA lists Winthrop as owned by a local government. The MN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 10 of the 20 active systems in Sibley County (50%) are also owned by a local government.
Does Winthrop have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in October 2024. The violations listed here began between March 1996 and October 2024. By type: 1 required treatment not met, 1 reporting and 1 monitoring and reporting. The contaminant or rule involved most often is Lead and Copper Rule Revisions (2 of them). EPA lists 2 as resolved and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 1996-03-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 3 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.
Winthrop: frequently asked questions
Who runs Winthrop?
Winthrop (PWSID MN1720008) is a community water system owned by a local government. It is regulated by the MN state drinking water program.
How many people does Winthrop serve?
Winthrop reports serving 1,330 people through 665 service connections in Sibley County, Minnesota.
Where does Winthrop 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 Winthrop have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in October 2024. 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 Winthrop's 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 3 violations for this system; 1 is health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MN state drinking water program.
Where can I find Winthrop's water quality report?
As a community water system, Winthrop 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 Sibley County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Gaylord | Sibley | 2,269 | Community | Groundwater |
| Arlington | Sibley | 2,230 | Community | Groundwater |
| Henderson | Sibley | 886 | Community | Groundwater |
| Gibbon | Sibley | 790 | Community | Groundwater |
| Green Isle | Sibley | 599 | Community | Groundwater |
| New Auburn | Sibley | 456 | 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, “Winthrop, PWSID MN1720008, Minnesota”, https://aquacensus.com/water-systems/minnesota/winthrop-mn1720008 (data as of October 1, 2026).