Public water system · WI4051031

Active

Suamico Waterworks

At a glance

Suamico Waterworks (PWSID WI4051031) is an active community water system in Brown County, Wisconsin. It reports serving 4,697 people through 1,739 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in July 2017.

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

Population served

4,697

Service connections

1,739

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDWI4051031

System typeCommunity water system

Activity statusActive

Population served4,697

Service connections1,739

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyWI state drinking water program

City servedSuamico

StateWisconsin

ZIP—

CountyBrown County

How does Suamico Waterworks compare with other water systems in Brown County?

By EPA's size categories, Suamico Waterworks is a medium system (3,301 to 10,000 people). Brown County has 148 active public water systems. Its population served is about 182% above the county average of 1,666 people per system, and accounts for 1.9% of the 246,537 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 Suamico Waterworks is about 30% 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 Suamico Waterworks?

EPA lists Suamico 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. 41 of the 148 active systems in Brown County (28%) are also owned by a local government.

Does Suamico Waterworks have drinking water violations?

EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in July 2017. The violations listed here began between January 1993 and July 2017. By type: 8 monitoring and reporting, 2 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Combined Radium (-226 and -228) (2 of them). EPA lists 10 as resolved 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. 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
2017-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Combined Radium (-226 and -228)code 4010	Yes	Resolved
2013-09-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2013-07-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2012-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2005-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
1996-01-01	Monitoring and reportingMonitoring, Regular · code 03	Gross alpha (excluding radon and uranium)code 4000	No	Resolved
1996-01-01	Monitoring and reportingMonitoring, Regular · code 03	Combined Radium (-226 and -228)code 4010	No	Resolved
1996-01-01	Monitoring and reportingMonitoring, Regular · code 03	Radium-226code 4020	No	Resolved
1996-01-01	Monitoring and reportingMonitoring, Regular · code 03	Radium-228code 4030	No	Resolved
1995-04-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
1993-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Archived

All 11 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.

Suamico Waterworks: frequently asked questions

Who runs Suamico Waterworks?

Suamico Waterworks (PWSID WI4051031) is a community water system owned by a local government. It is regulated by the WI state drinking water program.

How many people does Suamico Waterworks serve?

Suamico Waterworks reports serving 4,697 people through 1,739 service connections in Brown County, Wisconsin.

Where does Suamico 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 Suamico Waterworks have any drinking water violations?

EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in July 2017. 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 Suamico 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 11 violations for this system; 1 is health-based, and the most recent began in July 2017. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.

Where can I find Suamico Waterworks' water quality report?

As a community water system, Suamico 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 Brown County

Water system	County	Population served	Type	Source
Green Bay Waterworks	Brown	107,369	Community	Surface water
De Pere Waterworks Sa 1	Brown	25,660	Community	Purchased surface water
Howard Waterworks	Brown	21,133	Community	Purchased surface water
Ashwaubenon Waterworks	Brown	17,730	Community	Purchased surface water
Bellevue Waterworks	Brown	16,715	Community	Purchased surface water
Allouez Waterworks	Brown	13,923	Community	Purchased surface water

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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, “Suamico Waterworks, PWSID WI4051031, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/suamico-waterworks-wi4051031 (data as of October 1, 2026).