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Public water system record

North Fond Du Lac Waterworks

Serves North Fond du Lac, Fond du Lac County, WI · 5,414 people served

Federal records show 2 health-based violations and 6 monitoring/reporting issues for North Fond Du Lac Waterworks in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.

  • WI4200405
  • NORTH FOND DU LAC
  • WI
  • 5,414 served

System profile

Source water Groundwater
ZIP 54937
EPA system ID WI4200405

Verify this system on EPA ECHO →

Health-based violations, last 10 years
2
Resolved
2
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
6

Key facts

  • North Fond Du Lac Waterworks draws water from 3 wells.
  • Highest measured level in the last 10 years: Combined Radium (-226 and -228), 5.9966 pCi/L, federal limit 5 pCi/L (1.2 times the limit), 2019.
  • Most recent formal enforcement: compliance order (no penalty) by Wisconsin, September 2020.
  • Record on file since 1981, with 4 health-based violations before October 19, 2016.
  • Lead pipe inventory: 131 lead and 598 unknown out of 1,636 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
 350 Oct 17, 2024 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.9966 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Oct 1, 2019 Resolved No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Public Notice
OTHER
 Oct 17, 2024 Resolved
Lead and Copper Rule
Monitoring and reporting
 Feb 1, 2021 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2020 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2020 Resolved
Radium-226
Monitoring and reporting
 Jan 1, 2019 Resolved
Radium-228
Monitoring and reporting
 Jan 1, 2019 Resolved

Full record since 1981

EPA's records for North Fond Du Lac Waterworks go back to 1981. Before October 19, 2016 they list 4 health-based violations (1 resolved, 3 archived by EPA without a recorded fix) and 21 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1980s 3 0
1990s 1 2
2000s 0 11
2010 to October 18, 2016 0 8
October 19, 2016 to 2019 1 2
2020s 1 4

Most recent health-based violation before October 19, 2016: Gross Alpha, Excl. Radon and U, began January 1997, Resolved.

Show all 4 health-based violations before October 19, 2016
Contaminant Start date Status
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
 Jan 1, 1997 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
 Oct 1, 1984 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
 Oct 1, 1982 Archived
Combined Radium (-226 and -228)
Contaminant limit exceeded
 Oct 1, 1981 Archived

Enforcement actions

Wisconsin regulators took 2 formal enforcement actions against North Fond Du Lac Waterworks between 1983 and 2020. The most recent was a compliance order (no penalty) in September 2020.

Date By Action Violations covered
Sep 30, 2020 Wisconsin Compliance order (no penalty) 1 violation (1 health-based): Combined Radium (-226 and -228)
Sep 30, 1983 Wisconsin Signed compliance agreement 1 violation (1 health-based): Combined Radium (-226 and -228)

What the violations mean

LEAD AND COPPER RULE REVISIONS

1 incident

The system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).

The utility had to notify customers about this violation.

Combined Radium (-226 and -228)

1 incident

Test results for Combined Radium (-226 and -228) were above the federal limit (a maximum contaminant level violation).

The utility had to notify customers about this violation.

Where the water comes from

North Fond Du Lac Waterworks draws water from 3 wells. 1 other community water system buys water from North Fond Du Lac Waterworks.

Community systems that buy water from it

Annual water quality report

North Fond Du Lac Waterworks must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Wisconsin.

Certified drinking water labs by state EPA guidance for private wells