Public water system · WI2410556

Active

Brown Deer Waterworks

At a glance

Brown Deer Waterworks (PWSID WI2410556) is an active community water system in Milwaukee County, Wisconsin. It reports serving 12,741 people through 4,718 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in August 2020.

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

Population served

12,741

Service connections

4,718

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDWI2410556

System typeCommunity water system

Activity statusActive

Population served12,741

Service connections4,718

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyWI state drinking water program

City servedBrown Deer

StateWisconsin

ZIP—

CountyMilwaukee County

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

By EPA's size categories, Brown Deer Waterworks is a large system (10,001 to 100,000 people). Milwaukee County has 85 active public water systems. Its population served is about 14% above the county average of 11,209 people per system, and accounts for 1.3% of the 952,731 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 Brown Deer Waterworks is about twice 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 43 Wisconsin systems (0.4%) list purchased surface water as their primary source.

Who owns and regulates Brown Deer Waterworks?

EPA lists Brown Deer 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. 26 of the 85 active systems in Milwaukee County (31%) are also owned by a local government.

Does Brown Deer Waterworks have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in August 2020. The violations listed here began between January 2012 and August 2020. By type: 8 monitoring and reporting, 3 public notice, recordkeeping or other and 1 monitoring. The contaminant or rule involved most often is Haloacetic acids (HAA5) (3 of them). EPA lists 12 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
2020-08-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chloraminecode 1006	No	Resolved
2018-10-01	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2014-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2014-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2013-10-01	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2012-12-04	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2012-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2012-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2012-07-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2012-07-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2012-01-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved

The 12 most recent 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.

Brown Deer Waterworks: frequently asked questions

Who runs Brown Deer Waterworks?

Brown Deer Waterworks (PWSID WI2410556) is a community water system owned by a local government. It is regulated by the WI state drinking water program.

How many people does Brown Deer Waterworks serve?

Brown Deer Waterworks reports serving 12,741 people through 4,718 service connections in Milwaukee County, Wisconsin.

Where does Brown Deer Waterworks get its water?

EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.

Does Brown Deer Waterworks have any drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in August 2020. 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 Brown Deer 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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in August 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.

Where can I find Brown Deer Waterworks' water quality report?

As a community water system, Brown Deer 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 Milwaukee County

Water system	County	Population served	Type	Source
Milwaukee Waterworks	Milwaukee	626,000	Community	Surface water
West Allis Waterworks	Milwaukee	63,240	Community	Purchased surface water
Wauwatosa Waterworks	Milwaukee	49,064	Community	Purchased surface water
North Shore Water Commission	Milwaukee	35,598	Community	Surface water
Oak Creek Waterworks	Milwaukee	32,104	Community	Surface water
Franklin Water Utility	Milwaukee	22,500	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, “Brown Deer Waterworks, PWSID WI2410556, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/brown-deer-waterworks-wi2410556 (data as of October 1, 2026).