Public water system · WI6490343
ActiveSt Croix Falls Waterworks
At a glance
St Croix Falls Waterworks (PWSID WI6490343) is an active community water system in Polk County, Wisconsin. It reports serving 2,079 people through 967 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in January 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,079
Service connections
967
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does St Croix Falls Waterworks compare with other water systems in Polk County?
By EPA's size categories, St Croix Falls Waterworks is a small system (501 to 3,300 people). Polk County has 187 active public water systems, and St Croix Falls Waterworks is the 3rd-largest of them by population served. Its population served is about 17 times the county average of 121 people per system, and accounts for 9.2% of the 22,690 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 St Croix Falls 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 St Croix Falls Waterworks?
EPA lists St Croix Falls 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. 20 of the 187 active systems in Polk County (11%) are also owned by a local government.
Does St Croix Falls Waterworks have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in January 2024. The violations listed here began between February 1991 and January 2024. By type: 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminants or rules involved are Lead and Copper Rule and Total coliform bacteria (TCR). EPA lists 1 as resolved and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1991-02-25 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 2 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.
St Croix Falls Waterworks: frequently asked questions
Who runs St Croix Falls Waterworks?
St Croix Falls Waterworks (PWSID WI6490343) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does St Croix Falls Waterworks serve?
St Croix Falls Waterworks reports serving 2,079 people through 967 service connections in Polk County, Wisconsin.
Where does St Croix Falls 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 St Croix Falls Waterworks have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in January 2024. 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 St Croix Falls 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 2 violations for this system; 1 is health-based, and the most recent began in January 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find St Croix Falls Waterworks' water quality report?
As a community water system, St Croix Falls 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 Polk County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Amery Waterworks | Polk | 2,962 | Community | Groundwater |
| Osceola Waterworks | Polk | 2,680 | Community | Groundwater |
| Frederic Waterworks | Polk | 1,241 | Community | Groundwater |
| Luck Waterworks | Polk | 1,150 | Community | Groundwater |
| Clear Lake Waterworks | Polk | 1,061 | Community | Groundwater |
| Balsam Lake Waterworks | Polk | 1,031 | 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, “St Croix Falls Waterworks, PWSID WI6490343, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/st-croix-falls-waterworks-wi6490343 (data as of October 1, 2026).