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BLACK HILLS NF-COOK LAKE CG

South Dakota — Transient Non-Community — PWSID: WY5680010

System Information

PWSIDWY5680010
System NameBLACK HILLS NF-COOK LAKE CG
System TypeTransient Non-Community
Water SourceGround Water
Activity StatusActive
Owner TypeFederal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedFeb 2, 1981
Last ReportedNov 17, 2025

Location & Contact

StateSouth Dakota
CitySPEARFISH
ZIP Code57783
Address2014 N. Main Street
OrganizationCOUPE, BRITTANY
Phone605-442-3092

Population & Service

Population Served165
Service Connections1

Drinking Water Violations (13)

This water system has 13 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
Jul 11, 2025 — Revised Total Coliform Rule RPT No No — — — Resolved Jul 23, 2025 Revised Total Coliform Rule
Mar 7, 2018 — Revised Total Coliform Rule Other No No — — — Resolved May 17, 2018 Revised Total Coliform Rule
Sep 1, 2017 Sep 30, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2017 Revised Total Coliform Rule
Sep 1, 2017 Sep 30, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2017 Revised Total Coliform Rule
Sep 1, 2016 Sep 30, 2016 Revised Total Coliform Rule MCL Yes No — — — Resolved Sep 28, 2016 Revised Total Coliform Rule
Sep 1, 2016 Sep 30, 2016 Revised Total Coliform Rule MCL Yes No — — — Resolved Sep 28, 2016 Revised Total Coliform Rule
Jul 1, 2013 Sep 30, 2013 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2013 Total Coliform Rule
Jul 1, 2013 Sep 30, 2013 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2013 Total Coliform Rule
Jul 1, 2012 Sep 30, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2012 Total Coliform Rule
Jul 1, 2012 Sep 30, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2012 Total Coliform Rule
Apr 1, 2006 Jun 30, 2006 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jun 30, 2006 Total Coliform Rule
Apr 1, 2006 Jun 30, 2006 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jun 30, 2006 Total Coliform Rule
Aug 1, 2005 Aug 31, 2005 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Aug 31, 2005 Total Coliform 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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