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Public water system record

Deforest Waterworks

Serves DeForest, Dane County, WI · 10,500 people served

Federal records show 1 health-based violation and 1 monitoring/reporting issue for Deforest Waterworks in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.

  • WI1130221
  • DEFOREST
  • WI
  • 10,500 served

System profile

Source water Groundwater
ZIP 53532
EPA system ID WI1130221

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
1
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
1

Key facts

  • Deforest Waterworks draws water from 4 wells.
  • Record on file since 1993, with 3 health-based violations before October 19, 2016.
  • Lead pipe inventory: 13 lead and 756 unknown out of 4,311 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

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 Active

Full record since 1993

EPA's records for Deforest Waterworks go back to 1993. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 1 monitoring or reporting violation.

Violations that began in Health-based Monitoring and reporting
1990s 3 0
2000s 0 1
2020s 1 1

Most recent health-based violation before October 19, 2016: Total Coliform, began June 1993, Resolved.

Show all 3 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 Jun 1, 1993 Resolved
Total Coliform
Contaminant limit exceeded
 Apr 1, 1993 Resolved
Total Coliform
Contaminant limit exceeded
 Mar 1, 1993 Resolved

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.

Where the water comes from

Deforest Waterworks draws water from 4 wells.

Annual water quality report

Deforest 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.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

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