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WALNUT PARK

South Dakota — Community Water System — PWSID: SD4600316

System Information

PWSIDSD4600316
System NameWALNUT PARK
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1979
Last ReportedDec 9, 2025

Location & Contact

StateSouth Dakota
CitySPEARFISH
ZIP Code57783
Address5118 AIRPORT ROAD
OrganizationWALNUT PARK
Phone—

Population & Service

Population Served180
Service Connections72

Drinking Water Violations (182)

This water system has 182 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
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Feb 11, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Feb 11, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Feb 11, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Feb 11, 2025 Lead and Copper Rule Revisions
Feb 1, 2019 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Jun 21, 2019 Stage 1 Disinfectants and Disinfection Byproducts Rule
Feb 1, 2019 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Jun 21, 2019 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 2, 2018 — Groundwater Rule TT Yes No — — — Resolved Jul 30, 2019 Ground Water Rule
Oct 2, 2018 — Groundwater Rule TT Yes No — — — Resolved Jul 30, 2019 Ground Water Rule
May 16, 2018 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved May 30, 2018 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 16, 2018 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved May 30, 2018 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2018 May 31, 2018 Revised Total Coliform Rule MON No Yes — — — Resolved May 31, 2018 Revised Total Coliform Rule
May 1, 2018 May 31, 2018 Revised Total Coliform Rule MON No Yes — — — Resolved May 31, 2018 Revised Total Coliform Rule
May 1, 2018 May 31, 2018 Revised Total Coliform Rule MON No Yes — — — Resolved May 31, 2018 Revised Total Coliform Rule
Apr 1, 2018 Jun 30, 2018 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2018 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2018 Jun 30, 2018 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2018 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2018 Jun 30, 2018 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2018 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2017 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Jun 9, 2017 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2017 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Jun 9, 2017 Stage 1 Disinfectants and Disinfection Byproducts Rule
Aug 19, 2016 — Groundwater Rule TT Yes No — — — Resolved Aug 26, 2019 Ground Water Rule
Aug 19, 2016 — Groundwater Rule TT Yes No — — — Resolved Aug 26, 2019 Ground Water Rule
Feb 1, 2016 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Apr 28, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Feb 1, 2016 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Apr 28, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2013 Sep 30, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2013 Total Coliform Rule
Sep 1, 2013 Sep 30, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2013 Total Coliform Rule
Sep 1, 2013 Sep 30, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2013 Total Coliform Rule
Jul 1, 2013 Sep 30, 2013 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Feb 1, 2013 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Mar 18, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Feb 1, 2013 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Mar 18, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2010 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Jun 7, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2010 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Jun 7, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 17, 2007 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Jul 16, 2007 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Jul 15, 2007 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Jul 14, 2007 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Jul 13, 2007 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Jul 12, 2007 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Feb 8, 2007 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Nov 5, 2006 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Nov 5, 2006 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Nov 4, 2006 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Nov 4, 2006 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Nov 3, 2006 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Nov 3, 2006 — Public Notice Other No No — — — Resolved Jun 5, 2008 Public Notice Rule and Revised PN Rule
Oct 1, 2006 Dec 31, 2006 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2006 Arsenic Rule
Oct 1, 2006 Dec 31, 2006 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2006 Arsenic 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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