Public water system · WI6060226
ActiveCochrane Waterworks
At a glance
Cochrane Waterworks (PWSID WI6060226) is an active community water system in Buffalo County, Wisconsin. It reports serving 450 people through 166 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in November 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
450
Service connections
166
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Cochrane Waterworks compare with other water systems in Buffalo County?
By EPA's size categories, Cochrane Waterworks is a very small system (500 people or fewer). Buffalo County has 69 active public water systems, and Cochrane Waterworks is the 4th-largest of them by population served. Its population served is about 3.5 times the county average of 127 people per system, and accounts for 5.1% of the 8,759 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active community water system reports serving 6,703 people, so Cochrane Waterworks 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. Wisconsin has 1,053 active community water systems, 9.5% of the state's 11,056 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,978 Wisconsin systems (99%) list groundwater as their primary source.
Who owns and regulates Cochrane Waterworks?
EPA lists Cochrane Waterworks as owned by a local government. The WI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 17 of the 69 active systems in Buffalo County (25%) are also owned by a local government.
Does Cochrane Waterworks have drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in November 2024. The violations listed here began between January 2023 and November 2024. By type: 3 monitoring and reporting, 1 required treatment not met and 1 monitoring. The contaminants or rules involved are Stage 1 Disinfectants and Disinfection Byproducts Rule, Revised Total Coliform Rule, Lead and Copper Rule and Total trihalomethanes (TTHM). EPA lists 3 as resolved and 2 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 |
|---|---|---|---|---|
| 2024-11-02 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2024-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
All 5 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.
Cochrane Waterworks: frequently asked questions
Who runs Cochrane Waterworks?
Cochrane Waterworks (PWSID WI6060226) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Cochrane Waterworks serve?
Cochrane Waterworks reports serving 450 people through 166 service connections in Buffalo County, Wisconsin.
Where does Cochrane Waterworks 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 Cochrane Waterworks have any drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in November 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 Cochrane Waterworks' 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 5 violations for this system; 1 is health-based, and the most recent began in November 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Cochrane Waterworks' water quality report?
As a community water system, Cochrane Waterworks 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 Buffalo County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mondovi Waterworks | Buffalo | 2,667 | Community | Groundwater |
| Alma Waterworks | Buffalo | 769 | Community | Groundwater |
| Cochrane Fountain City School | Buffalo | 635 | Non-transient non-community | Groundwater |
| Fountain City Waterworks | Buffalo | 443 | Community | Groundwater |
| Nelson Water & Sewer Dept | Buffalo | 375 | Community | Groundwater |
| Lyster Lutheran Church | Buffalo | 370 | Transient non-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, “Cochrane Waterworks, PWSID WI6060226, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/cochrane-waterworks-wi6060226 (data as of October 1, 2026).