Water Quality in 54935 — Fond Du Lac, WI
EPA data for FOND DU LAC WATERWORKS
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 54935 in Fond Du Lac, Wisconsin is served by FOND DU LAC WATERWORKS (EPA ID: WI4200469). This system provides water to approximately 44,303 people from groundwater sources.
There are 7 community water systems serving this area.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Resolved |
| October 17, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Resolved |
| October 17, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| October 17, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| October 17, 2024 | Lead and Copper Rule | Monitoring | Unresolved |
| January 8, 2024 | Total Coliform | Monitoring | Resolved |
| January 8, 2024 | Total Coliform | Monitoring | Resolved |
| January 8, 2024 | Total Coliform | Monitoring | Resolved |
| November 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| November 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| November 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| October 1, 2023 | Lead | Monitoring | Resolved |
| October 1, 2023 | Lead | Monitoring | Unresolved |
| October 1, 2023 | Lead | Monitoring | Resolved |
| April 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| April 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for water systems serving this ZIP code:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 10 | No |
| Stage 2 DBP Rule | Treatment Technique | 4 | Yes |
| Lead and Copper Rule | Treatment Technique | 4 | No |
| Lead | Inorganic | 3 | No |
| Total Coliform | Microbiological | 3 | No |
| Stage 1 DBP Rule | Treatment Technique | 2 | No |
Need help with your water quality?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| FOND DU LAC WATERWORKS | WI4200469 | 44,303 | Groundwater |
| ASHWOOD GROVE EDGEWATER | WI4200485 | 1,046 | Groundwater |
| FOND DU LAC TN WATER UTILITY | WI4200429 | 980 | Groundwater |
| WOODLAND PARK | WI4200798 | 66 | Groundwater |
| MARY HILL PARK SANITARY DIST | WI4200465 | 65 | Groundwater |
What You Can Do
- Request your water system’s Consumer Confidence Report (CCR) — Your utility is required to publish this annually
- Consider a home water test — Independent testing can reveal issues in your specific plumbing
- Install a certified water filter — NSF-certified filters can address specific contaminants
- Contact your water provider — Ask about current treatment and any ongoing remediation
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Other Water Quality Reports in Wisconsin
- 53001 (Adell) — 2 violations
- 53002 (Allenton)
- 53004 (Belgium) — 2 violations
- 53005 (Brookfield) — 22 violations
- 53006 (Brownsville) — 4 violations
- 53007 (Butler) — 5 violations
- 53010 (Campbellsport) — 26 violations
- 53011 (Cascade)
- 53012 (Cedarburg)
- 53013 (Cedar Grove)
- 53014 (Chilton) — 4 violations
- 53015 (Cleveland) — 2 violations
- 53016 (Clyman) — 3 violations
- 53017 (Colgate)
- 53018 (Delafield) — 21 violations
- 53019 (Eden)
- 53020 (Elkhart Lake)
- 53051 (Menomonee Falls) — 1 violation
- 53061 (New Holstein) — 4 violations
- 53081 (Sheboygan) — 10 violations
Nearby Water Quality Reports
- 53019 (Eden) — 8 mi
- 53006 (Brownsville) — 13 mi — 4 violations
- 53010 (Campbellsport) — 14 mi — 26 violations
- 54901 (Oshkosh) — 18 mi — 16 violations
- 53011 (Cascade) — 19 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for FOND DU LAC WATERWORKS (WI4200469) on EPA.gov.
Frequently Asked Questions
Is the tap water in 54935 safe to drink?
Fond Du Lac’s water system has recorded 2 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
Where does 54935’s water come from?
The primary water source for this area is groundwater. FOND DU LAC WATERWORKS serves approximately 44,303 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 54935 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 54935. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 54935?
Radon zone data is not available for ZIP code 54935. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.