Public water system · WI7371700
ActiveKronenwetter Water & Sewer Utility
At a glance
Kronenwetter Water & Sewer Utility (PWSID WI7371700) is an active community water system in Marathon County, Wisconsin. It reports serving 6,931 people through 1,792 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; 1 is health-based, and the most recent began in July 2025.
This page covers its drinking water system only; sewer and wastewater service are not part of EPA's drinking water records.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
6,931
Service connections
1,792
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Kronenwetter Water & Sewer Utility compare with other water systems in Marathon County?
By EPA's size categories, Kronenwetter Water & Sewer Utility is a medium system (3,301 to 10,000 people). Marathon County has 196 active public water systems, and Kronenwetter Water & Sewer Utility is the 3rd-largest of them by population served. Its population served is about 13 times the county average of 528 people per system, and accounts for 6.7% of the 103,490 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 Kronenwetter Water & Sewer Utility is roughly in line with 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 Kronenwetter Water & Sewer Utility?
EPA lists Kronenwetter Water & Sewer Utility 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. 43 of the 196 active systems in Marathon County (22%) are also owned by a local government.
Does Kronenwetter Water & Sewer Utility have drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in July 2025. The violations listed here began between January 2011 and July 2025. By type: 3 monitoring and reporting, 2 public notice, recordkeeping or other and 1 required treatment not met. The contaminants or rules involved are Consumer Confidence Rule, Public Notice, Lead and Copper Rule Revisions and Lead and Copper Rule. EPA lists 5 as resolved and 1 as unaddressed. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2024-10-17 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2020-07-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2011-02-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
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.
Kronenwetter Water & Sewer Utility: frequently asked questions
Who runs Kronenwetter Water & Sewer Utility?
Kronenwetter Water & Sewer Utility (PWSID WI7371700) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Kronenwetter Water & Sewer Utility serve?
Kronenwetter Water & Sewer Utility reports serving 6,931 people through 1,792 service connections in Marathon County, Wisconsin.
Where does Kronenwetter Water & Sewer Utility 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 Kronenwetter Water & Sewer Utility have any drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in July 2025. 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 Kronenwetter Water & Sewer Utility'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 6 violations for this system; 1 is health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Kronenwetter Water & Sewer Utility's water quality report?
As a community water system, Kronenwetter Water & Sewer Utility 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 Marathon County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Wausau Waterworks | Marathon | 39,994 | Community | Groundwater |
| Weston Municipal Utilities | Marathon | 16,000 | Community | Groundwater |
| Rib Mountain Water Utility | Marathon | 6,398 | Community | Groundwater |
| Mosinee Waterworks | Marathon | 3,406 | Community | Groundwater |
| Rothschild Waterworks | Marathon | 3,190 | Community | Groundwater |
| Abbotsford Waterworks | Marathon | 2,502 | 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, “Kronenwetter Water & Sewer Utility, PWSID WI7371700, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/kronenwetter-water-sewer-utility-wi7371700 (data as of October 1, 2026).