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OACOMA

South Dakota — Community Water System — PWSID: SD4600229

System Information

PWSIDSD4600229
System NameOACOMA
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1979
Last ReportedMar 2, 2026

Location & Contact

StateSouth Dakota
CityOACOMA
ZIP Code57365
AddressPO BOX 129
OrganizationOACOMA
Phone6057344455

Population & Service

Population Served386
Service Connections190

Drinking Water Violations (48)

This water system has 48 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
Jun 14, 2014 — Other No No — — — Resolved Aug 24, 2015 —
Jun 14, 2014 — Other No No — — — Resolved Aug 24, 2015 —
Apr 1, 2013 Jun 30, 2013 MCL Yes No .093 MG/L 0.080 mg/L — Resolved Jun 30, 2013 —
Apr 1, 2013 Jun 30, 2013 MCL Yes No .093 MG/L 0.080 mg/L — Resolved Jun 30, 2013 —
Apr 1, 2013 Jun 30, 2013 MCL Yes No .093 MG/L 0.080 mg/L — Resolved Jun 30, 2013 —
Apr 1, 2013 Jun 30, 2013 MCL Yes No .093 MG/L 0.080 mg/L — Resolved Jun 30, 2013 —
Jan 1, 2013 Mar 31, 2013 MCL Yes No .089 MG/L 0.080 mg/L — Resolved Mar 31, 2013 —
Jan 1, 2013 Mar 31, 2013 MCL Yes No .089 MG/L 0.080 mg/L — Resolved Mar 31, 2013 —
Jan 1, 2013 Mar 31, 2013 MCL Yes No .089 MG/L 0.080 mg/L — Resolved Mar 31, 2013 —
Oct 1, 2012 Dec 31, 2012 MCL Yes No .091 MG/L 0.080 mg/L — Resolved Dec 31, 2012 —
Oct 1, 2012 Dec 31, 2012 MCL Yes No .062 MG/L 0.060 mg/L — Resolved Dec 31, 2012 —
Oct 1, 2012 Dec 31, 2012 MCL Yes No .062 MG/L 0.060 mg/L — Resolved Dec 31, 2012 —
Oct 1, 2012 Dec 31, 2012 MCL Yes No .091 MG/L 0.080 mg/L — Resolved Dec 31, 2012 —
Oct 1, 2012 Dec 31, 2012 MCL Yes No .062 MG/L 0.060 mg/L — Resolved Dec 31, 2012 —
Oct 1, 2012 Dec 31, 2012 MCL Yes No .091 MG/L 0.080 mg/L — Resolved Dec 31, 2012 —
Oct 1, 2012 Dec 31, 2012 MCL Yes No .062 MG/L 0.060 mg/L — Resolved Dec 31, 2012 —
Oct 1, 2012 Dec 31, 2012 MCL Yes No .091 MG/L 0.080 mg/L — Resolved Dec 31, 2012 —
Jul 1, 2012 Sep 30, 2012 MCL Yes No .093 MG/L 0.080 mg/L — Resolved Sep 30, 2012 —
Jul 1, 2012 Sep 30, 2012 MCL Yes No .093 MG/L 0.080 mg/L — Resolved Sep 30, 2012 —
Jul 1, 2012 Sep 30, 2012 MCL Yes No .093 MG/L 0.080 mg/L — Resolved Sep 30, 2012 —
Jul 1, 2012 Sep 30, 2012 MCL Yes No .093 MG/L 0.080 mg/L — Resolved Sep 30, 2012 —
Apr 1, 2012 Jun 30, 2012 MCL Yes No .087 MG/L 0.080 mg/L — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 TT Yes No — TT — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 MCL Yes No .087 MG/L 0.080 mg/L — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 TT Yes No — TT — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 MCL Yes No .087 MG/L 0.080 mg/L — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 MCL Yes No .087 MG/L 0.080 mg/L — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 TT Yes No — TT — Resolved Jun 30, 2012 —
Apr 1, 2012 Jun 30, 2012 TT Yes No — TT — Resolved Jun 30, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .061 MG/L 0.060 mg/L — Resolved Mar 31, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .083 MG/L 0.080 mg/L — Resolved Mar 31, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .083 MG/L 0.080 mg/L — Resolved Mar 31, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .061 MG/L 0.060 mg/L — Resolved Mar 31, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .061 MG/L 0.060 mg/L — Resolved Mar 31, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .061 MG/L 0.060 mg/L — Resolved Mar 31, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .083 MG/L 0.080 mg/L — Resolved Mar 31, 2012 —
Jan 1, 2012 Mar 31, 2012 MCL Yes No .083 MG/L 0.080 mg/L — Resolved Mar 31, 2012 —
Jun 25, 2011 — Other No No — — — Resolved Apr 4, 2012 —
Jun 25, 2011 — Other No No — — — Resolved Apr 4, 2012 —
Oct 1, 2004 Dec 31, 2004 TT Yes No — TT — Resolved Dec 31, 2004 —
Oct 1, 2004 Dec 31, 2004 TT Yes No — TT — Resolved Dec 31, 2004 —
Jun 1, 1996 Jun 30, 1996 MR No Yes — 5% of samples — Archived Jun 30, 1996 —
Jun 1, 1996 Jun 30, 1996 MR No Yes — 5% of samples — Archived Jun 30, 1996 —
Jan 1, 1993 Mar 31, 1993 MR No Yes — 10 mg/L — Resolved Mar 31, 1993 —
Jan 1, 1993 Mar 31, 1993 MR No Yes — 10 mg/L — Resolved Mar 31, 1993 —
Jul 1, 1976 Jun 30, 1980 MR No No — 5 pCi/L — Archived Jun 30, 1980 —
Jul 1, 1976 Jun 30, 1980 MR No No — 15 pCi/L — Archived Jun 30, 1980 —
— — — No No — — — — — —

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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