Public water system · WI2410144
ActiveSouth Milwaukee Waterworks
At a glance
South Milwaukee Waterworks (PWSID WI2410144) is an active community water system in Milwaukee County, Wisconsin. It reports serving 21,340 people through 7,903 service connections. Its primary water source is 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 June 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
21,340
Service connections
7,903
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does South Milwaukee Waterworks compare with other water systems in Milwaukee County?
By EPA's size categories, South Milwaukee Waterworks is a large system (10,001 to 100,000 people). Milwaukee County has 85 active public water systems. Its population served is about twice the county average of 11,209 people per system, and accounts for 2.2% 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 South Milwaukee Waterworks is about 3.2 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 20 Wisconsin systems (0.2%) list surface water as their primary source.
Who owns and regulates South Milwaukee Waterworks?
EPA lists South Milwaukee 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 South Milwaukee 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 June 2023. The violations listed here began between January 2020 and June 2023. By type: 10 monitoring and reporting, 1 monitoring and 1 public notice, recordkeeping or other. The contaminants or rules involved are Revised Total Coliform Rule, Public Notice, Styrene and Vinyl chloride. 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 |
|---|---|---|---|---|
| 2023-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-02-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbon tetrachloridecode 2982 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | 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.
South Milwaukee Waterworks: frequently asked questions
Who runs South Milwaukee Waterworks?
South Milwaukee Waterworks (PWSID WI2410144) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does South Milwaukee Waterworks serve?
South Milwaukee Waterworks reports serving 21,340 people through 7,903 service connections in Milwaukee County, Wisconsin.
Where does South Milwaukee Waterworks get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does South Milwaukee 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 June 2023. 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 South Milwaukee 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 June 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find South Milwaukee Waterworks' water quality report?
As a community water system, South Milwaukee 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, “South Milwaukee Waterworks, PWSID WI2410144, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/south-milwaukee-waterworks-wi2410144 (data as of October 1, 2026).