Public water system · WI4360427

Active

Kiel Waterworks

At a glance

Kiel Waterworks (PWSID WI4360427) is an active community water system in Manitowoc County, Wisconsin. It reports serving 3,932 people through 1,456 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 June 2024.

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

Population served

3,932

Service connections

1,456

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDWI4360427

System typeCommunity water system

Activity statusActive

Population served3,932

Service connections1,456

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyWI state drinking water program

City servedKiel

StateWisconsin

ZIP—

CountyManitowoc County

How does Kiel Waterworks compare with other water systems in Manitowoc County?

By EPA's size categories, Kiel Waterworks is a medium system (3,301 to 10,000 people). Manitowoc County has 139 active public water systems, and Kiel Waterworks is the 3rd-largest of them by population served. Its population served is about 8.5 times the county average of 461 people per system, and accounts for 6.1% of the 64,022 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 Kiel Waterworks is about 41% 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 Kiel Waterworks?

EPA lists Kiel 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. 18 of the 139 active systems in Manitowoc County (13%) are also owned by a local government.

Does Kiel Waterworks have drinking water violations?

EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in June 2024. The violations listed here began between January 1994 and June 2024. By type: 5 monitoring and reporting, 3 required treatment not met and 2 monitoring. The contaminant or rule involved most often is Lead and Copper Rule (5 of them). EPA lists 10 as resolved. 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.

Began	Violation	Contaminant or rule	Health-based	Status
2024-06-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2022-06-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2019-01-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2018-10-01	Required treatment not metOCCT/SOWT Study/Recommendation · code 57	Lead and Copper Rulecode 5000	Yes	Resolved
2017-04-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Resolved
2016-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2016-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2015-01-01	Required treatment not metPublic Education · code 65	Lead and Copper Rulecode 5000	Yes	Resolved
2012-01-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
1994-01-01	Required treatment not metPublic Education · code 65	Lead and Copper Rulecode 5000	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.

Kiel Waterworks: frequently asked questions

Who runs Kiel Waterworks?

Kiel Waterworks (PWSID WI4360427) is a community water system owned by a local government. It is regulated by the WI state drinking water program.

How many people does Kiel Waterworks serve?

Kiel Waterworks reports serving 3,932 people through 1,456 service connections in Manitowoc County, Wisconsin.

Where does Kiel 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 Kiel 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 June 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 Kiel 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 June 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 Kiel Waterworks' water quality report?

As a community water system, Kiel 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 Manitowoc County

Water system	County	Population served	Type	Source
Manitowoc Waterworks	Manitowoc	34,500	Community	Surface water
Two Rivers Waterworks	Manitowoc	11,270	Community	Surface water
Cleveland Waterworks	Manitowoc	1,524	Community	Groundwater
Mishicot Waterworks	Manitowoc	1,432	Community	Groundwater
Reedsville Waterworks	Manitowoc	1,200	Community	Groundwater
Valders Waterworks	Manitowoc	954	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, “Kiel Waterworks, PWSID WI4360427, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/kiel-waterworks-wi4360427 (data as of October 1, 2026).