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HERMOSA WATER USERS ASSOCIATION

South Dakota — Community Water System — PWSID: SD4602180

System Information

PWSIDSD4602180
System NameHERMOSA WATER USERS ASSOCIATION
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedJun 19, 1999
Last ReportedDec 9, 2025

Location & Contact

StateSouth Dakota
CityHERMOSA
ZIP Code57744
Address23912 145TH AVENUE
OrganizationHERMOSA WATER USERS ASSOCIATION
Phone—

Population & Service

Population Served108
Service Connections49

Drinking Water Violations (89)

This water system has 89 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, 2021 — Lead and Copper Rule MR No No — TT — Resolved Dec 23, 2021 Lead and Copper Rule
Jul 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Dec 23, 2021 Lead and Copper Rule
Jul 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Dec 23, 2021 Lead and Copper Rule
Jul 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Dec 16, 2020 Lead and Copper Rule
Jul 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Dec 16, 2020 Lead and Copper Rule
Jul 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Dec 16, 2020 Lead and Copper Rule
Oct 5, 2019 — Revised Total Coliform Rule TT Yes No — — — Resolved Oct 24, 2019 Revised Total Coliform Rule
Oct 5, 2019 — Revised Total Coliform Rule TT Yes No — — — Resolved Oct 24, 2019 Revised Total Coliform Rule
Jul 1, 2019 Jul 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2019 Revised Total Coliform Rule
Jul 1, 2019 Jul 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2019 Revised Total Coliform Rule
Jul 1, 2019 Jul 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2019 Revised Total Coliform Rule
Aug 1, 2017 Aug 31, 2017 Revised Total Coliform Rule MCL Yes No — — — Resolved Aug 31, 2017 Revised Total Coliform Rule
Aug 1, 2017 Aug 31, 2017 Revised Total Coliform Rule MCL Yes No — — — Resolved Aug 31, 2017 Revised Total Coliform Rule
Aug 1, 2017 Aug 31, 2017 Revised Total Coliform Rule MCL Yes No — — — Resolved Aug 31, 2017 Revised Total Coliform Rule
Aug 1, 2013 Aug 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Aug 31, 2013 Total Coliform Rule
Aug 1, 2013 Aug 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Aug 31, 2013 Total Coliform Rule
Aug 1, 2013 Aug 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Aug 31, 2013 Total Coliform Rule
Apr 1, 2005 Apr 30, 2005 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Apr 30, 2005 Total Coliform Rule
Apr 1, 2005 Apr 30, 2005 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Apr 30, 2005 Total Coliform Rule
Apr 1, 2005 Apr 30, 2005 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Apr 30, 2005 Total Coliform Rule
Nov 13, 2001 — Public Notice Other No No — — — Resolved Apr 18, 2007 Public Notice Rule and Revised PN Rule
Sep 1, 2001 Sep 30, 2001 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2001 Total Coliform Rule
Sep 1, 2001 Sep 30, 2001 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2001 Total Coliform Rule
Sep 1, 2001 Sep 30, 2001 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2001 Total Coliform Rule
Sep 1, 2001 Sep 30, 2001 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2001 Total Coliform Rule
Jan 1, 2001 Mar 31, 2001 Combined Radium (-226 and -228) MCL Yes No 6.7 5 pCi/L 5 Resolved Mar 31, 2001 Radionuclides and Revised Rad Rule
Jan 1, 2001 Mar 31, 2001 Combined Radium (-226 and -228) MCL Yes No 6.7 5 pCi/L 5 Resolved Mar 31, 2001 Radionuclides and Revised Rad Rule
Jul 1, 2000 Sep 30, 2000 Combined Radium (-226 and -228) MCL Yes No 5.7 5 pCi/L 5 Resolved Sep 30, 2000 Radionuclides and Revised Rad Rule
Jul 1, 2000 Sep 30, 2000 Combined Radium (-226 and -228) MCL Yes No 5.7 5 pCi/L 5 Resolved Sep 30, 2000 Radionuclides and Revised Rad Rule
Dec 13, 1999 Jan 12, 2000 Coliform (TCR) Other No No — 5% of samples — Archived Jan 12, 2000 Total Coliform Rule
Nov 14, 1999 Dec 13, 1999 Lead and Copper Rule Other No No — TT — Archived Dec 13, 1999 Lead and Copper Rule
Nov 1, 1999 Nov 30, 1999 Coliform (TCR) MR No Yes — 5% of samples — Archived Nov 30, 1999 Total Coliform Rule
Nov 1, 1999 Nov 30, 1999 Coliform (TCR) MR No Yes — 5% of samples — Archived Nov 30, 1999 Total Coliform Rule
Oct 1, 1999 Dec 31, 1999 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Oct 31, 1999 Coliform (TCR) MR No Yes — 5% of samples — Archived Oct 31, 1999 Total Coliform Rule
Oct 1, 1999 Dec 31, 1999 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Oct 31, 1999 Coliform (TCR) MR No Yes — 5% of samples — Archived Oct 31, 1999 Total Coliform Rule
Oct 1, 1999 Dec 31, 1999 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Oct 1, 1999 Dec 31, 1999 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals

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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