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TRI-COUNTY RURAL WATER SYSTEM

South Dakota — Community Water System — PWSID: SD4600112

System Information

PWSIDSD4600112
System NameTRI-COUNTY RURAL WATER SYSTEM
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypePrivate
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1979
Last ReportedDec 9, 2025

Location & Contact

StateSouth Dakota
CityEAGLE BUTTE
ZIP Code57625
AddressPO BOX 490
OrganizationTRI-COUNTY RURAL WATER SYSTEM
Phone6059647766

Population & Service

Population Served2,190
Service Connections876

Drinking Water Violations (139)

This water system has 139 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Dec 1, 2022 Dec 31, 2022 Revised Total Coliform Rule MON No No — — — Resolved Dec 31, 2022 Revised Total Coliform Rule
Dec 1, 2022 Dec 31, 2022 Revised Total Coliform Rule MON No No — — — Resolved Dec 31, 2022 Revised Total Coliform Rule
Dec 1, 2022 Dec 31, 2022 Revised Total Coliform Rule MON No No — — — Resolved Dec 31, 2022 Revised Total Coliform Rule
Oct 1, 2022 Dec 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 19, 2013 — Other No No — — — Resolved Apr 29, 2014 Ground Water Rule
May 19, 2013 — Other No No — — — Resolved Apr 29, 2014 Ground Water Rule
Mar 1, 2009 Mar 31, 2009 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2009 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2009 Mar 31, 2009 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2009 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2009 Mar 31, 2009 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2009 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2008 Dec 31, 2008 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Dec 31, 2008 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2008 Dec 31, 2008 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Dec 31, 2008 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2008 Dec 31, 2008 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Dec 31, 2008 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2006 Nov 30, 2006 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2006 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2006 Nov 30, 2006 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2006 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2006 Nov 30, 2006 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2006 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 10, 2006 — Public Notice Other No No — — — Resolved Mar 4, 2008 Public Notice Rule and Revised PN Rule
Apr 10, 2006 — Public Notice Other No No — — — Resolved Mar 4, 2008 Public Notice Rule and Revised PN Rule
Apr 1, 2006 Jun 30, 2006 TTHM MCL Yes No .085 0.080 mg/L — Resolved Jun 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2006 Jun 30, 2006 TTHM MCL Yes No .085 0.080 mg/L — Resolved Jun 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 10, 2006 — Public Notice Other No No — — — Resolved Mar 4, 2008 Public Notice Rule and Revised PN Rule
Jan 10, 2006 — Public Notice Other No No — — — Resolved Mar 4, 2008 Public Notice Rule and Revised PN Rule
Jan 1, 2006 Mar 31, 2006 TTHM MCL Yes No .085 0.080 mg/L — Resolved Mar 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2006 Mar 31, 2006 TTHM MCL Yes No .085 0.080 mg/L — Resolved Mar 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2006 Mar 31, 2006 TTHM MCL Yes No .085 0.080 mg/L — Resolved Mar 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2005 — Consumer Confidence Rule Other No No — — — Resolved Dec 5, 2005 Consumer Confidence Rule
Oct 1, 2005 — Consumer Confidence Rule Other No No — — — Resolved Dec 5, 2005 Consumer Confidence Rule
Oct 1, 2005 Dec 31, 2005 TTHM MCL Yes No .082 0.080 mg/L — Resolved Dec 31, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2005 Dec 31, 2005 TTHM MCL Yes No .082 0.080 mg/L — Resolved Dec 31, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2005 Dec 31, 2005 TTHM MCL Yes No .082 0.080 mg/L — Resolved Dec 31, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 10, 2005 — Public Notice Other No No — — — Resolved Mar 4, 2008 Public Notice Rule and Revised PN Rule
Jul 10, 2005 — Public Notice Other No No — — — Resolved Mar 4, 2008 Public Notice Rule and Revised PN Rule
Jul 1, 2005 Sep 30, 2005 TTHM MCL Yes No .085 0.080 mg/L — Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2005 Sep 30, 2005 TTHM MCL Yes No .085 0.080 mg/L — Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2005 Sep 30, 2005 TTHM MCL Yes No .085 0.080 mg/L — Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2005 Apr 30, 2005 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2005 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2005 Apr 30, 2005 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2005 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2005 Jun 30, 2005 TTHM MCL Yes No .09 0.080 mg/L — Resolved Jun 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2005 Jun 30, 2005 TTHM MCL Yes No .09 0.080 mg/L — Resolved Jun 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2005 Jun 30, 2005 TTHM MCL Yes No .09 0.080 mg/L — Resolved Jun 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2005 Jun 30, 2005 TTHM MCL Yes No .09 0.080 mg/L — Resolved Jun 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2005 Apr 30, 2005 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2005 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2005 Apr 30, 2005 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2005 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2005 Jun 30, 2005 Total Haloacetic Acids (HAA5) MCL Yes No .065 0.060 mg/L — Resolved Jun 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2005 Jun 30, 2005 Total Haloacetic Acids (HAA5) MCL Yes No .065 0.060 mg/L — Resolved Jun 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2005 Jun 30, 2005 Total Haloacetic Acids (HAA5) MCL Yes No .065 0.060 mg/L — Resolved Jun 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2005 Mar 31, 2005 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2005 Mar 31, 2005 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2005 Mar 31, 2005 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2005 Mar 31, 2005 TTHM MCL Yes No .089 0.080 mg/L — Resolved Mar 31, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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