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NORTH FOND DU LAC WATERWORKS

PWS ID: WI4200405 · NORTH FOND DU LAC, Wisconsin 54937

NORTH FOND DU LAC WATERWORKS serves 5,014 people in NORTH FOND DU LAC, Wisconsin using Groundwater water sources. It has 86 recorded EPA violations, including 17 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: NORTH FOND DU LAC WATERWORKS

NORTH FOND DU LAC WATERWORKS is a local-owned community water system that delivers drinking water to 5,014 residents in NORTH FOND DU LAC, Wisconsin (Fond du Lac County) through 1,857 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 86 total violations for this system , of which 17 (20%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 53 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Combined Radium (-226 and -228), recorded in 14 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 9.9 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Wisconsin, EPA tracks 10,988 public water systems serving 5,131,439 people, with 285,161 cumulative violations and 58,688 health-based violations on record. About 72% of systems in the state carry at least one violation, and state-wide the average per system is 26 violations. NORTH FOND DU LAC WATERWORKS's 86 violations sit above the Wisconsin average. Statewide, 78 of 202 UCMR5-tested systems have reported PFAS detections (38.6%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
5,014
Total Violations
86
Health-Based Violations
17
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,857
County
Fond du Lac
School/Daycare
No
MCL Violations
15
Monitoring Violations
53
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 14 2019
Consumer Confidence Rule Other 11 2020
Radium-228 MR 10 2019
Radium-226 MR 10 2019
Lead and Copper Rule MR 8 2021
Coliform (TCR) MR 7 2014
Gross Alpha, Excl. Radon and U MR 6 2002
Chlorine MR 4 2014
Total Haloacetic Acids (HAA5) MR 4 2015
TTHM MR 4 2015
LEAD AND COPPER RULE REVISIONS TT 2 2024
Public Notice Other 1 2024
LEAD AND COPPER RULE REVISIONS RPT 1 2025
Gross Alpha, Excl. Radon and U MCL 1 1997

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
ADONA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 5/16/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 5/16/2023 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 5/16/2023 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/16/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFBS 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 5/16/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/16/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 5/16/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/16/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 5/16/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFMPA 5/16/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDoA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/16/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 5/16/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 5/16/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 5/16/2023 9.9000 µg/L 9 µg/L Detected
8:2 FTS 5/16/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/16/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/16/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 5/16/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 11/21/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFUnA 11/21/2023 <0.002 µg/L 0.002 µg/L Not Detected
lithium 11/21/2023 9.7000 µg/L 9 µg/L Detected
NFDHA 11/21/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFMBA 11/21/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 11/21/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 11/21/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 11/21/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 11/21/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 11/21/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 11/21/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 11/21/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 11/21/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 11/21/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFEESA 11/21/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 11/21/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 11/21/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 11/21/2023 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 11/21/2023 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 11/21/2023 <0.006 µg/L 0.006 µg/L Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for NORTH FOND DU LAC WATERWORKS.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID WI4200405 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Wisconsin Drinking Water Authority

Wisconsin DNR — Drinking Water and Groundwater is the primacy agency that licenses and inspects NORTH FOND DU LAC WATERWORKS under EPA-delegated authority.

Open WI regulator portal

Source: Wisconsin DNR — Drinking Water and Groundwater

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / WI4200405 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / WI4200405 / 5200
2024 Public Notice Other 1 SDWIS / WI4200405 / 7500
2021 Lead and Copper Rule MR 8 SDWIS / WI4200405 / 5000
2020 Consumer Confidence Rule Other 11 SDWIS / WI4200405 / 7000
2019 Combined Radium (-226 and -228) MCL 14 SDWIS / WI4200405 / 4010
2019 Radium-228 MR 10 SDWIS / WI4200405 / 4030
2019 Radium-226 MR 10 SDWIS / WI4200405 / 4020
2015 Total Haloacetic Acids (HAA5) MR 4 SDWIS / WI4200405 / 2456
2015 TTHM MR 4 SDWIS / WI4200405 / 2950
2014 Coliform (TCR) MR 7 SDWIS / WI4200405 / 3100
2014 Chlorine MR 4 SDWIS / WI4200405 / 0999
2002 Gross Alpha, Excl. Radon and U MR 6 SDWIS / WI4200405 / 4000
1997 Gross Alpha, Excl. Radon and U MCL 1 SDWIS / WI4200405 / 4000

How NORTH FOND DU LAC WATERWORKS Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric NORTH FOND DU LAC WATERWORKS Wisconsin avg Federal benchmark
Total violations 86 26 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 17 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 38.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 5,014 467 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 10,988 regulated public water systems in Wisconsin.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is NORTH FOND DU LAC WATERWORKS water safe to drink? ▼
NORTH FOND DU LAC WATERWORKS (PWS ID: WI4200405) has 86 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 5,014 people using Groundwater sources.
How many people does NORTH FOND DU LAC WATERWORKS serve? ▼
NORTH FOND DU LAC WATERWORKS serves 5,014 people in NORTH FOND DU LAC, Wisconsin. It is a Local-owned system using Groundwater water sources with 1,857 service connections.
What type of violations does NORTH FOND DU LAC WATERWORKS have? ▼
NORTH FOND DU LAC WATERWORKS has 86 total violations: 17 health-based violations (MCL exceedances or treatment failures), 53 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in NORTH FOND DU LAC WATERWORKS water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in NORTH FOND DU LAC WATERWORKS's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does NORTH FOND DU LAC WATERWORKS use? ▼
NORTH FOND DU LAC WATERWORKS uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial