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Public water system record

Merrimac Waterworks

Serves Merrimac, Sauk County, WI · 440 people served

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

  • WI1570093
  • MERRIMAC
  • WI
  • 440 served

System profile

Source water Groundwater
ZIP 53561
EPA system ID WI1570093

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
2

Key facts

  • Merrimac Waterworks draws water from 1 well.
  • Record on file since 1993, with 3 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 10 unknown out of 427 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
Lead and Copper Rule
Treatment technique failure
 350 Jan 1, 2018 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
Lead and Copper Rule
Monitoring and reporting
 Jan 1, 2012 Active

Full record since 1993

EPA's records for Merrimac Waterworks go back to 1993. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 31 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 0 25
2000s 3 4
2010 to October 18, 2016 0 2
October 19, 2016 to 2019 1 0
2020s 1 1

Most recent health-based violation before October 19, 2016: Total Coliform, began July 2002, Resolved.

Show all 3 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 Jul 1, 2002 Resolved
Total Coliform
Contaminant limit exceeded
 Jul 1, 2000 Resolved
Total Coliform
Contaminant limit exceeded
 Jun 1, 2000 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.

Lead and Copper Rule

1 incident

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 this violation.

Where the water comes from

Merrimac Waterworks draws water from 1 well.

Annual water quality report

Merrimac 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 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Merrimac Waterworks for a copy.

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