Public water system · WI1130023
ActiveBlue Mounds Waterworks
At a glance
Blue Mounds Waterworks (PWSID WI1130023) is an active community water system in Dane County, Wisconsin. It reports serving 950 people through 351 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; 3 are health-based, and the most recent began in June 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
950
Service connections
351
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Blue Mounds Waterworks compare with other water systems in Dane County?
By EPA's size categories, Blue Mounds Waterworks is a small system (501 to 3,300 people). Dane County has 300 active public water systems. Its population served is about half of the county average of 1,742 people per system, and accounts for 0.2% of the 522,696 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 Blue Mounds Waterworks is well 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 Blue Mounds Waterworks?
EPA lists Blue Mounds 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. 74 of the 300 active systems in Dane County (25%) are also owned by a local government.
Does Blue Mounds Waterworks have drinking water violations?
EPA's records list 8 violations for this system; 3 are health-based, and the most recent began in June 2025. The violations listed here began between October 1993 and June 2025. By type: 4 monitoring and reporting, 3 contaminant level above the legal limit and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 8 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 |
|---|---|---|---|---|
| 2025-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2023-06-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 1995-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 8 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.
Blue Mounds Waterworks: frequently asked questions
Who runs Blue Mounds Waterworks?
Blue Mounds Waterworks (PWSID WI1130023) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Blue Mounds Waterworks serve?
Blue Mounds Waterworks reports serving 950 people through 351 service connections in Dane County, Wisconsin.
Where does Blue Mounds 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 Blue Mounds Waterworks have any drinking water violations?
EPA's records list 8 violations for this system; 3 are health-based, and the most recent began in June 2025. 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 Blue Mounds 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 8 violations for this system; 3 are health-based, and the most recent began in June 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Blue Mounds Waterworks' water quality report?
As a community water system, Blue Mounds 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 Dane County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Madison Water Utility | Dane | 272,000 | Community | Groundwater |
| Sun Prairie Utilities | Dane | 39,300 | Community | Groundwater |
| Fitchburg Utility Dist 1 | Dane | 24,500 | Community | Groundwater |
| Middleton Waterworks | Dane | 23,868 | Community | Groundwater |
| Waunakee Waterworks | Dane | 14,879 | Community | Groundwater |
| Verona Waterworks | Dane | 14,030 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Blue Mounds Waterworks, PWSID WI1130023, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/blue-mounds-waterworks-wi1130023 (data as of October 1, 2026).