Public water system · WI1570109
ActiveSpring Green Waterworks
At a glance
Spring Green Waterworks (PWSID WI1570109) is an active community water system in Sauk County, Wisconsin. It reports serving 1,626 people through 602 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in November 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,626
Service connections
602
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Spring Green Waterworks compare with other water systems in Sauk County?
By EPA's size categories, Spring Green Waterworks is a small system (501 to 3,300 people). Sauk County has 199 active public water systems. Its population served is about 4.8 times the county average of 342 people per system, and accounts for 2.4% of the 68,062 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 Spring Green 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 Spring Green Waterworks?
EPA lists Spring Green 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. 28 of the 199 active systems in Sauk County (14%) are also owned by a local government.
Does Spring Green Waterworks have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in November 2019. The violations listed here began between April 2008 and November 2019. By type: 10 monitoring and reporting, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 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 |
|---|---|---|---|---|
| 2019-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2012-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | 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.
Spring Green Waterworks: frequently asked questions
Who runs Spring Green Waterworks?
Spring Green Waterworks (PWSID WI1570109) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Spring Green Waterworks serve?
Spring Green Waterworks reports serving 1,626 people through 602 service connections in Sauk County, Wisconsin.
Where does Spring Green 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 Spring Green Waterworks have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in November 2019. 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 Spring Green 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, one is health-based, and the most recent began in November 2019. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Spring Green Waterworks' water quality report?
As a community water system, Spring Green 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 Sauk County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Baraboo Waterworks | Sauk | 12,703 | Community | Groundwater |
| Reedsburg Waterworks | Sauk | 9,984 | Community | Groundwater |
| Ho Chunk Casino | Sauk | 5,486 | Non-transient non-community | Groundwater |
| Prairie Du Sac Waterworks | Sauk | 4,006 | Community | Groundwater |
| Sauk City Waterworks | Sauk | 3,518 | Community | Groundwater |
| Lake Delton Waterworks | Sauk | 2,914 | 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, “Spring Green Waterworks, PWSID WI1570109, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/spring-green-waterworks-wi1570109 (data as of October 1, 2026).