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Public water system record

Hillsboro Waterworks

Serves Hillsboro, Vernon County, WI · 1,325 people served

Federal records show 8 health-based violations and 10 monitoring/reporting issues for Hillsboro Waterworks in the last ten years. The most serious issue in this window was a resolved Lead and Copper Rule violation.

  • WI6630257
  • HILLSBORO
  • WI
  • 1,325 served

System profile

Source water Groundwater
ZIP 54634
EPA system ID WI6630257

Verify this system on EPA ECHO →

Health-based violations, last 10 years
8
Resolved
8
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
10

Key facts

  • Hillsboro Waterworks draws water from 2 wells.
  • Most recent enforcement action: boil water order by Wisconsin, September 1995.
  • Record on file since 1994, with 4 health-based violations before October 20, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 616 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
Treatment technique failure
 350 Mar 11, 2023 Resolved No
Lead and Copper Rule
Treatment technique failure
 350 Sep 17, 2021 Resolved No
Lead and Copper Rule
Treatment technique failure
 350 Jul 1, 2019 Resolved No
Groundwater Rule
Treatment technique failure
 140 Jun 2, 2019 Resolved No
Groundwater Rule
Treatment technique failure
 140 Jun 2, 2019 Resolved No
Groundwater Rule
Treatment technique failure
 140 Jun 2, 2019 Resolved No
Groundwater Rule
Treatment technique failure
 140 Jun 2, 2019 Resolved No
Groundwater Rule
Treatment technique failure
 140 Jun 2, 2019 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Consumer Confidence Rule
OTHER
 Jul 1, 2023 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2023 Resolved
Public Notice
OTHER
 Jun 2, 2019 Resolved
Public Notice
OTHER
 Jun 2, 2019 Resolved
Public Notice
OTHER
 Jun 2, 2019 Resolved
Public Notice
OTHER
 Jun 2, 2019 Resolved
Public Notice
OTHER
 Jun 2, 2019 Resolved
Groundwater Rule
OTHER
 Jun 1, 2019 Resolved
Groundwater Rule
OTHER
 Apr 6, 2019 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jun 1, 2017 Resolved

Full record since 1994

EPA's records for Hillsboro Waterworks go back to 1994. Before October 20, 2016 they list 4 health-based violations (4 resolved) and 3 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 4 2
2000s 0 1
October 20, 2016 to 2019 6 8
2020s 2 2

Most recent health-based violation before October 20, 2016: Total Coliform, began May 1998, Resolved.

Show all 4 health-based violations before October 20, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 May 1, 1998 Resolved
Total Coliform
Contaminant limit exceeded
 Sep 1, 1995 Resolved
Total Coliform
Contaminant limit exceeded
 Aug 1, 1995 Resolved
Total Coliform
Contaminant limit exceeded
 Nov 1, 1994 Resolved

Enforcement actions

Wisconsin regulators issued 1 boil water order to Hillsboro Waterworks in 1995. The most recent was a boil water order in September 1995.

Date By Action Violations covered
Sep 13, 1995 Wisconsin Boil water order 1 violation (1 health-based): Total Coliform

What the violations mean

Groundwater Rule

5 incidents

The system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).

The utility had to notify customers about each of these violations.

Lead and Copper Rule

3 incidents

The system did not complete a treatment step or action that the Lead and Copper Rule requires (a treatment technique violation).

The utility had to notify customers about each of these violations.

Where the water comes from

Hillsboro Waterworks draws water from 2 wells.

Annual water quality report

Hillsboro 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