Public water system · WI2460109
ActiveFredonia Waterworks
At a glance
Fredonia Waterworks (PWSID WI2460109) is an active community water system in Ozaukee County, Wisconsin. It reports serving 2,279 people through 844 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in January 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,279
Service connections
844
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Fredonia Waterworks compare with other water systems in Ozaukee County?
By EPA's size categories, Fredonia Waterworks is a small system (501 to 3,300 people). Ozaukee County has 249 active public water systems. Its population served is about 6.1 times the county average of 371 people per system, and accounts for 2.5% of the 92,392 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 Fredonia Waterworks is about 66% 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 Fredonia Waterworks?
EPA lists Fredonia 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. 24 of the 249 active systems in Ozaukee County (9.6%) are also owned by a local government.
Does Fredonia Waterworks have drinking water violations?
EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in January 2023. The violations listed here began between December 1992 and January 2023. By type: 7 monitoring and reporting and 3 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 10 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 |
|---|---|---|---|---|
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endothallcode 2033 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endothallcode 2033 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 2004-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2002-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2000-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1992-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 10 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.
Fredonia Waterworks: frequently asked questions
Who runs Fredonia Waterworks?
Fredonia Waterworks (PWSID WI2460109) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Fredonia Waterworks serve?
Fredonia Waterworks reports serving 2,279 people through 844 service connections in Ozaukee County, Wisconsin.
Where does Fredonia 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 Fredonia Waterworks have any drinking water violations?
EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in January 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 Fredonia 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 10 violations for this system; 3 are health-based, and the most recent began in January 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 Fredonia Waterworks' water quality report?
As a community water system, Fredonia 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 Ozaukee County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Port Washington Waterworks | Ozaukee | 12,853 | Community | Surface water |
| Cedarburg L & W Commission | Ozaukee | 12,500 | Community | Groundwater |
| Grafton Waterworks | Ozaukee | 12,269 | Community | Groundwater |
| Mequon Water Utility | Ozaukee | 11,152 | Community | Purchased surface water |
| Saukville Waterworks | Ozaukee | 4,268 | Community | Groundwater |
| Belgium Waterworks | Ozaukee | 2,493 | 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, “Fredonia Waterworks, PWSID WI2460109, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/fredonia-waterworks-wi2460109 (data as of October 1, 2026).