Public water system · WI6060193

Active

Mondovi Waterworks

At a glance

Mondovi Waterworks (PWSID WI6060193) is an active community water system in Buffalo County, Wisconsin. It reports serving 2,667 people through 1,130 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in January 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

2,667

Service connections

1,130

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDWI6060193

System typeCommunity water system

Activity statusActive

Population served2,667

Service connections1,130

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyWI state drinking water program

City servedMondovi

StateWisconsin

ZIP—

CountyBuffalo County

How does Mondovi Waterworks compare with other water systems in Buffalo County?

By EPA's size categories, Mondovi Waterworks is a small system (501 to 3,300 people). Buffalo County has 69 active public water systems, and Mondovi Waterworks is the largest of them by population served. Its population served is about 21 times the county average of 127 people per system, and accounts for 30% 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 Mondovi Waterworks is about 60% 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 Mondovi Waterworks?

EPA lists Mondovi 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 Mondovi Waterworks have drinking water violations?

EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in January 2024. The violations listed here began between October 1993 and January 2024. By type: 7 monitoring and reporting, 2 required treatment not met and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 8 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
2024-01-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2021-11-02	Required treatment not metTreatment Technique No Certif. Operator · code 12	Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400	Yes	Resolved
2021-02-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2017-01-10	Required treatment not metFailure To Address Deficiency · code 45	Groundwater Rulecode 0700	Yes	Resolved
1997-01-01	Monitoring and reportingMonitoring, Regular · code 03	Gross alpha (excluding radon and uranium)code 4000	No	Resolved
1994-09-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
1994-09-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Archived
1994-08-17	Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25	Total coliform bacteria (TCR)code 3100	No	Archived
1994-08-01	Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25	Total coliform bacteria (TCR)code 3100	No	Resolved
1993-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved

All 10 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.

Mondovi Waterworks: frequently asked questions

Who runs Mondovi Waterworks?

Mondovi Waterworks (PWSID WI6060193) is a community water system owned by a local government. It is regulated by the WI state drinking water program.

How many people does Mondovi Waterworks serve?

Mondovi Waterworks reports serving 2,667 people through 1,130 service connections in Buffalo County, Wisconsin.

Where does Mondovi 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 Mondovi Waterworks have any drinking water violations?

EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in January 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 Mondovi 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 10 violations for this system; 3 are health-based, and the most recent began in January 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 Mondovi Waterworks' water quality report?

As a community water system, Mondovi 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
Alma Waterworks	Buffalo	769	Community	Groundwater
Cochrane Fountain City School	Buffalo	635	Non-transient non-community	Groundwater
Cochrane Waterworks	Buffalo	450	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, “Mondovi Waterworks, PWSID WI6060193, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/mondovi-waterworks-wi6060193 (data as of October 1, 2026).