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OAK MOUNTAIN COUNTRY ESTATES

South Dakota — Community Water System — PWSID: SD4602151

System Information

PWSIDSD4602151
System NameOAK MOUNTAIN COUNTRY ESTATES
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedMar 10, 1995
Last ReportedDec 9, 2025

Location & Contact

StateSouth Dakota
CityBLACK HAWK
ZIP Code57718
AddressPO BOX 761
OrganizationOAK MOUNTAIN COUNTRY ESTATES
Phone6057864366

Population & Service

Population Served85
Service Connections34

Drinking Water Violations (294)

This water system has 294 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 1, 2017 Sep 30, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 18 PCI/L 15 pCi/L — Resolved Sep 30, 2017 Radionuclides and Revised Rad Rule
Jul 1, 2017 Sep 30, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 18 PCI/L 15 pCi/L — Resolved Sep 30, 2017 Radionuclides and Revised Rad Rule
Jul 1, 2017 Sep 30, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 18 PCI/L 15 pCi/L — Resolved Sep 30, 2017 Radionuclides and Revised Rad Rule
Jul 1, 2017 Sep 30, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 18 PCI/L 15 pCi/L — Resolved Sep 30, 2017 Radionuclides and Revised Rad Rule
Apr 1, 2017 Jun 30, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 40 PCI/L 15 pCi/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad Rule
Apr 1, 2017 Jun 30, 2017 Combined Radium (-226 and -228) MCL Yes No 10 PCI/L 5 pCi/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad Rule
Apr 1, 2017 Jun 30, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 40 PCI/L 15 pCi/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad Rule
Apr 1, 2017 Jun 30, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 40 PCI/L 15 pCi/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad Rule
Apr 1, 2017 Jun 30, 2017 Combined Radium (-226 and -228) MCL Yes No 10 PCI/L 5 pCi/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad Rule
Apr 1, 2017 Jun 30, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 40 PCI/L 15 pCi/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad Rule
Apr 1, 2017 Jun 30, 2017 Combined Radium (-226 and -228) MCL Yes No 10 PCI/L 5 pCi/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad Rule
Apr 1, 2017 Jun 30, 2017 Combined Radium (-226 and -228) MCL Yes No 10 PCI/L 5 pCi/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad Rule
Jan 1, 2017 Mar 31, 2017 Combined Radium (-226 and -228) MCL Yes No 12 PCI/L 5 pCi/L — Resolved Mar 31, 2017 Radionuclides and Revised Rad Rule
Jan 1, 2017 Mar 31, 2017 Combined Radium (-226 and -228) MCL Yes No 12 PCI/L 5 pCi/L — Resolved Mar 31, 2017 Radionuclides and Revised Rad Rule
Jan 1, 2017 Mar 31, 2017 Combined Radium (-226 and -228) MCL Yes No 12 PCI/L 5 pCi/L — Resolved Mar 31, 2017 Radionuclides and Revised Rad Rule
Jan 1, 2017 Mar 31, 2017 Combined Radium (-226 and -228) MCL Yes No 12 PCI/L 5 pCi/L — Resolved Mar 31, 2017 Radionuclides and Revised Rad Rule
Jan 1, 2017 Mar 31, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 44 PCI/L 15 pCi/L — Resolved Mar 31, 2017 Radionuclides and Revised Rad Rule
Jan 1, 2017 Mar 31, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 44 PCI/L 15 pCi/L — Resolved Mar 31, 2017 Radionuclides and Revised Rad Rule
Jan 1, 2017 Mar 31, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 44 PCI/L 15 pCi/L — Resolved Mar 31, 2017 Radionuclides and Revised Rad Rule
Jan 1, 2017 Mar 31, 2017 Gross Alpha, Excl. Radon and U MCL Yes No 44 PCI/L 15 pCi/L — Resolved Mar 31, 2017 Radionuclides and Revised Rad Rule
Oct 1, 2016 Dec 31, 2016 Gross Alpha, Excl. Radon and U MCL Yes No 46 PCI/L 15 pCi/L — Resolved Dec 31, 2016 Radionuclides and Revised Rad Rule
Oct 1, 2016 Dec 31, 2016 Gross Alpha, Excl. Radon and U MCL Yes No 46 PCI/L 15 pCi/L — Resolved Dec 31, 2016 Radionuclides and Revised Rad Rule
Oct 1, 2016 Dec 31, 2016 Gross Alpha, Excl. Radon and U MCL Yes No 46 PCI/L 15 pCi/L — Resolved Dec 31, 2016 Radionuclides and Revised Rad Rule
Oct 1, 2016 Dec 31, 2016 Gross Alpha, Excl. Radon and U MCL Yes No 46 PCI/L 15 pCi/L — Resolved Dec 31, 2016 Radionuclides and Revised Rad Rule
Oct 1, 2016 Dec 31, 2016 Combined Radium (-226 and -228) MCL Yes No 13 PCI/L 5 pCi/L — Resolved Dec 31, 2016 Radionuclides and Revised Rad Rule
Oct 1, 2016 Dec 31, 2016 Combined Radium (-226 and -228) MCL Yes No 13 PCI/L 5 pCi/L — Resolved Dec 31, 2016 Radionuclides and Revised Rad Rule
Oct 1, 2016 Dec 31, 2016 Combined Radium (-226 and -228) MCL Yes No 13 PCI/L 5 pCi/L — Resolved Dec 31, 2016 Radionuclides and Revised Rad Rule
Oct 1, 2016 Dec 31, 2016 Combined Radium (-226 and -228) MCL Yes No 13 PCI/L 5 pCi/L — Resolved Dec 31, 2016 Radionuclides and Revised Rad Rule
Aug 1, 2016 Aug 31, 2016 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2016 Revised Total Coliform Rule
Aug 1, 2016 Aug 31, 2016 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2016 Revised Total Coliform Rule
Aug 1, 2016 Aug 31, 2016 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2016 Revised Total Coliform Rule
Aug 1, 2016 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Sep 20, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2016 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Sep 20, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2016 Sep 30, 2016 Gross Alpha, Excl. Radon and U MCL Yes No 39 PCI/L 15 pCi/L — Resolved Sep 30, 2016 Radionuclides and Revised Rad Rule
Jul 1, 2016 Sep 30, 2016 Combined Radium (-226 and -228) MCL Yes No 12 PCI/L 5 pCi/L — Resolved Sep 30, 2016 Radionuclides and Revised Rad Rule
Jul 1, 2016 Sep 30, 2016 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2016 Sep 30, 2016 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2016 Sep 30, 2016 Gross Alpha, Excl. Radon and U MCL Yes No 39 PCI/L 15 pCi/L — Resolved Sep 30, 2016 Radionuclides and Revised Rad Rule
Jul 1, 2016 Sep 30, 2016 Gross Alpha, Excl. Radon and U MCL Yes No 39 PCI/L 15 pCi/L — Resolved Sep 30, 2016 Radionuclides and Revised Rad Rule
Jul 1, 2016 Sep 30, 2016 Combined Radium (-226 and -228) MCL Yes No 12 PCI/L 5 pCi/L — Resolved Sep 30, 2016 Radionuclides and Revised Rad Rule
Jul 1, 2016 Sep 30, 2016 Combined Radium (-226 and -228) MCL Yes No 12 PCI/L 5 pCi/L — Resolved Sep 30, 2016 Radionuclides and Revised Rad Rule
Jul 1, 2016 Sep 30, 2016 Combined Radium (-226 and -228) MCL Yes No 12 PCI/L 5 pCi/L — Resolved Sep 30, 2016 Radionuclides and Revised Rad Rule
Jul 1, 2016 Sep 30, 2016 Gross Alpha, Excl. Radon and U MCL Yes No 39 PCI/L 15 pCi/L — Resolved Sep 30, 2016 Radionuclides and Revised Rad Rule
Apr 1, 2016 Jun 30, 2016 Combined Radium (-226 and -228) MCL Yes No 9 PCI/L 5 pCi/L — Resolved Jun 30, 2016 Radionuclides and Revised Rad Rule
Apr 1, 2016 Jun 30, 2016 Combined Radium (-226 and -228) MCL Yes No 9 PCI/L 5 pCi/L — Resolved Jun 30, 2016 Radionuclides and Revised Rad Rule
Apr 1, 2016 Jun 30, 2016 Combined Radium (-226 and -228) MCL Yes No 9 PCI/L 5 pCi/L — Resolved Jun 30, 2016 Radionuclides and Revised Rad Rule
Apr 1, 2016 Jun 30, 2016 Gross Alpha, Excl. Radon and U MCL Yes No 18 PCI/L 15 pCi/L — Resolved Jun 30, 2016 Radionuclides and Revised Rad Rule
Apr 1, 2016 Jun 30, 2016 Gross Alpha, Excl. Radon and U MCL Yes No 18 PCI/L 15 pCi/L — Resolved Jun 30, 2016 Radionuclides and Revised Rad Rule
Apr 1, 2016 Jun 30, 2016 Gross Alpha, Excl. Radon and U MCL Yes No 18 PCI/L 15 pCi/L — Resolved Jun 30, 2016 Radionuclides and Revised Rad Rule
Jan 1, 2016 Mar 31, 2016 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L — Resolved Mar 31, 2016 Radionuclides and Revised Rad 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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