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OAKS WATER USERS ASSOCIATION

South Dakota — Community Water System — PWSID: SD4602135

System Information

PWSIDSD4602135
System NameOAKS WATER USERS ASSOCIATION
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedMar 11, 1994
Last ReportedDec 9, 2025

Location & Contact

StateSouth Dakota
CityNEW UNDERWOOD
ZIP Code57761
Address824 S. A AVE
OrganizationOAKS WATER USERS ASSOCIATION
Phone—

Population & Service

Population Served180
Service Connections73

Drinking Water Violations (127)

This water system has 127 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
Feb 1, 2015 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Mar 31, 2015 Stage 1 Disinfectants and Disinfection Byproducts Rule
Feb 1, 2015 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Mar 31, 2015 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2001 Sep 30, 2001 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 30, 2001 Radionuclides and Revised Rad Rule
Jul 1, 2001 Sep 30, 2001 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 30, 2001 Radionuclides and Revised Rad Rule
Jul 1, 2001 Sep 30, 2001 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Sep 30, 2001 Radionuclides and Revised Rad Rule
Jul 1, 2001 Sep 30, 2001 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Sep 30, 2001 Radionuclides and Revised Rad Rule
Apr 1, 2001 Apr 30, 2001 Coliform (TCR) MR No Yes — 5% of samples — Resolved Apr 30, 2001 Total Coliform Rule
Apr 1, 2001 Apr 30, 2001 Coliform (TCR) MR No Yes — 5% of samples — Resolved Apr 30, 2001 Total Coliform Rule
Apr 1, 2001 Apr 30, 2001 Coliform (TCR) MR No Yes — 5% of samples — Resolved Apr 30, 2001 Total Coliform Rule
Sep 1, 2000 Sep 30, 2000 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2000 Total Coliform Rule
Sep 1, 2000 Sep 30, 2000 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2000 Total Coliform Rule
Sep 1, 2000 Sep 30, 2000 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2000 Total Coliform Rule
Feb 1, 1999 Feb 28, 1999 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Feb 28, 1999 Total Coliform Rule
Feb 1, 1999 Feb 28, 1999 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Feb 28, 1999 Total Coliform Rule
Feb 1, 1999 Feb 28, 1999 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Feb 28, 1999 Total Coliform Rule
Jan 1, 1998 Mar 31, 1998 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Xylenes, Total MR No Yes — 10 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Xylenes, Total MR No Yes — 10 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Styrene MR No Yes — 0.1 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Styrene MR No Yes — 0.1 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Benzene MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Benzene MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Toluene MR No Yes — 1 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Resolved Mar 31, 1998 Volatile Organic Chemicals
Jan 1, 1998 Mar 31, 1998 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Mar 31, 1998 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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