Public water system · WI6560119
ActiveBaldwin Waterworks
At a glance
Baldwin Waterworks (PWSID WI6560119) is an active community water system in St. Croix County, Wisconsin. It reports serving 4,440 people through 1,774 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in June 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,440
Service connections
1,774
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Baldwin Waterworks compare with other water systems in St. Croix County?
By EPA's size categories, Baldwin Waterworks is a medium system (3,301 to 10,000 people). St. Croix County has 165 active public water systems, and Baldwin Waterworks is the 3rd-largest of them by population served. Its population served is about 13 times the county average of 349 people per system, and accounts for 7.7% of the 57,590 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 Baldwin Waterworks is about 34% 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 Baldwin Waterworks?
EPA lists Baldwin 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. 21 of the 165 active systems in St. Croix County (13%) are also owned by a local government.
Does Baldwin Waterworks have drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in June 2023. The violations listed here began between July 1995 and June 2023. By type: 2 contaminant level above the legal limit, 1 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 4 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 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2023-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2009-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1995-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 4 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.
Baldwin Waterworks: frequently asked questions
Who runs Baldwin Waterworks?
Baldwin Waterworks (PWSID WI6560119) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Baldwin Waterworks serve?
Baldwin Waterworks reports serving 4,440 people through 1,774 service connections in St. Croix County, Wisconsin.
Where does Baldwin 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 Baldwin Waterworks have any drinking water violations?
EPA's records list 4 violations for this system; 2 are 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 Baldwin 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 4 violations for this system; 2 are 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 Baldwin Waterworks' water quality report?
As a community water system, Baldwin 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 St. Croix County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Hudson Waterworks | St. Croix | 18,558 | Community | Groundwater |
| New Richmond Waterworks | St. Croix | 10,824 | Community | Groundwater |
| Somerset Waterworks | St. Croix | 3,334 | Community | Groundwater |
| Hammond Waterworks | St. Croix | 1,884 | Community | Groundwater |
| Roberts Waterworks | St. Croix | 1,872 | Community | Groundwater |
| Woodville Waterworks | St. Croix | 1,386 | 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, “Baldwin Waterworks, PWSID WI6560119, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/baldwin-waterworks-wi6560119 (data as of October 1, 2026).