Public Water Partners

EAGLE BUTTE, SD · Dewey County

TRI-COUNTY RURAL WATER SYSTEM Water System

Consumer Confidence Report status

TRI-COUNTY RURAL WATER SYSTEM 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 TRI-COUNTY RURAL WATER SYSTEM.

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 South Dakota’s official records. Always confirm current status with South Dakota before making decisions based on this information.

System facts

System ID (PWSID)
SD4600112
System type
Community Water System
Population served
2,190
Service connections
876
Ownership
privately owned
Water source
surface water (rivers, lakes, or reservoirs)

TRI-COUNTY RURAL WATER SYSTEM is one of 124 community water systems in South Dakota in the 501 to 3,300 people size category, serving 2,190 people from surface water.

As of August 1, 2026, its federal record holds 7 entries between 1976 and 2006, all of which EPA lists as closed. Nothing has been added since 2006.

Of the 7, 4 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, the Radionuclides and Revised Rad Rule, and the Public Notice Rule and Revised PN Rule.

Violation history

  • Public Notification Violation for NPDWR Violation

    —

    Public Notice

    April 10, 2006 – March 4, 2008

    Resolved

  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    October 1, 2005 – December 31, 2005

    Resolved

  • Single Turbidity Exceed (Enhanced SWTR)

    Health-based

    Interim Enhanced Surface Water Treatment Rule

    April 1, 2005 – April 30, 2005

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 2002 – December 31, 2002

    Resolved

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 2002 – December 31, 2002

    Resolved

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    July 1, 1976 – June 30, 1980

    Archived

  • Monitoring, Regular

    —

    Combined Radium (-226 and -228)

    July 1, 1976 – June 30, 1980

    Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

Common questions

Is TRI-COUNTY RURAL WATER SYSTEM required to publish a Consumer Confidence Report?

Yes. TRI-COUNTY RURAL WATER SYSTEM 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 TRI-COUNTY RURAL WATER SYSTEM’s next Consumer Confidence Report due?

TRI-COUNTY RURAL WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does TRI-COUNTY RURAL WATER SYSTEM have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for TRI-COUNTY RURAL WATER SYSTEM.

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

TRI-COUNTY RURAL WATER SYSTEM

6059647766

EAGLE BUTTE, SD 57625