Public water system · WI7290129
ActiveMauston Waterworks
At a glance
Mauston Waterworks (PWSID WI7290129) is an active community water system in Juneau County, Wisconsin. It reports serving 4,456 people through 1,646 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,456
Service connections
1,646
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Mauston Waterworks compare with other water systems in Juneau County?
By EPA's size categories, Mauston Waterworks is a medium system (3,301 to 10,000 people). Juneau County has 146 active public water systems, and Mauston Waterworks is the largest of them by population served. Its population served is about 25 times the county average of 182 people per system, and accounts for 17% of the 26,525 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 Mauston Waterworks is about 34% 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 Mauston Waterworks?
EPA lists Mauston 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. 24 of the 146 active systems in Juneau County (16%) are also owned by a local government.
Does Mauston Waterworks have drinking water violations?
EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in October 2024. The violations listed here began between July 1992 and October 2024. By type: 3 monitoring and reporting, 1 required treatment not met, 1 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 4 as resolved, 1 as unaddressed 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. 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 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2021-02-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1993-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-01-01 | Monitoring and reportingInitial, Follow-up, or Routine Source Water M/R · code 56 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1992-07-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Archived |
All 6 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.
Mauston Waterworks: frequently asked questions
Who runs Mauston Waterworks?
Mauston Waterworks (PWSID WI7290129) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Mauston Waterworks serve?
Mauston Waterworks reports serving 4,456 people through 1,646 service connections in Juneau County, Wisconsin.
Where does Mauston 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 Mauston Waterworks have any drinking water violations?
EPA's records list 6 violations for this system; 2 are 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 Mauston 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 6 violations for this system; 2 are 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 WI state drinking water program.
Where can I find Mauston Waterworks' water quality report?
As a community water system, Mauston 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 Juneau County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Woodside Sports Complex | Juneau | 3,008 | Transient non-community | Groundwater |
| New Lisbon Waterworks | Juneau | 2,526 | Community | Groundwater |
| Wi Dot Rest Area 9 Lemonweir | Juneau | 2,000 | Transient non-community | Groundwater |
| Wi Dot Rest Area 10 Kildare | Juneau | 2,000 | Transient non-community | Groundwater |
| Elroy Waterworks | Juneau | 1,333 | Community | Groundwater |
| Necedah Waterworks | Juneau | 844 | 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, “Mauston Waterworks, PWSID WI7290129, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/mauston-waterworks-wi7290129 (data as of October 1, 2026).