Public Water Partners

MERRIMAC, WI · Sauk County

MERRIMAC WATERWORKS Water System

Consumer Confidence Report status

MERRIMAC WATERWORKS must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for MERRIMAC WATERWORKS.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Wisconsin’s official records. Always confirm current status with Wisconsin before making decisions based on this information.

System facts

System ID (PWSID)
WI1570093
System type
Community Water System
Population served
440
Service connections
162
Ownership
local government
Water source
groundwater (wells)

MERRIMAC WATERWORKS is one of 1,289 community water systems in Wisconsin in the 500 or fewer people size category, serving 440 people from groundwater.

As of August 1, 2026, its federal record holds 20 entries in 1993, all of which EPA lists as closed. Nothing has been added since 1993.

All 20 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves synthetic organic chemicals.

Violation history

  • Monitoring, Regular

    —

    Endrin

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    BHC-GAMMA

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Methoxychlor

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Toxaphene

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Dalapon

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Simazine

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Picloram

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Hexachlorocyclopentadiene

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Aldicarb sulfoxide

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Aldicarb sulfone

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Aldicarb

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    LASSO

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Heptachlor

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Heptachlor epoxide

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    2,4,5-TP

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Total Polychlorinated Biphenyls (PCB)

    January 1, 1993 – December 29, 1993

    Resolved

  • Monitoring, Regular

    —

    Chlordane

    January 1, 1993 – December 29, 1993

    Resolved

Resolved addressed and confirmed by the state

Enforcement actions

No enforcement actions on record for this system.

Common questions

Is MERRIMAC WATERWORKS required to publish a Consumer Confidence Report?

Yes. MERRIMAC WATERWORKS is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is MERRIMAC WATERWORKS’s next Consumer Confidence Report due?

MERRIMAC WATERWORKS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does MERRIMAC WATERWORKS have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for MERRIMAC WATERWORKS.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

KLECKER, JENNIE - ADMINISTRATOR

Phone not on record

MERRIMAC, WI 53561