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GREGORY

South Dakota — Community Water System — PWSID: SD4600145

System Information

PWSIDSD4600145
System NameGREGORY
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1979
Last ReportedDec 9, 2025

Location & Contact

StateSouth Dakota
CityGREGORY
ZIP Code57533
AddressPO BOX 436
OrganizationGREGORY
Phone6058358270

Population & Service

Population Served1,221
Service Connections741

Drinking Water Violations (53)

This water system has 53 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
Jan 3, 2019 — Groundwater Rule TT Yes No — — — Resolved Sep 2, 2020 Ground Water Rule
Jan 3, 2019 — Groundwater Rule TT Yes No — — — Resolved Sep 2, 2020 Ground Water Rule
Oct 1, 2005 — Lead and Copper Rule MR No No — TT — Resolved Jun 21, 2006 Lead and Copper Rule
Oct 1, 2005 — Lead and Copper Rule MR No No — TT — Resolved Jun 21, 2006 Lead and Copper Rule
Oct 1, 2005 — Lead and Copper Rule MR No No — TT — Resolved Jun 21, 2006 Lead and Copper Rule
Oct 1, 2005 — Lead and Copper Rule MR No No — TT — Resolved Jun 21, 2006 Lead and Copper Rule
Jan 1, 2004 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Apr 7, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2004 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Apr 7, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 1999 Dec 31, 1999 Toxaphene MR No Yes — 0.003 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Aug 14, 2000 Lead and Copper Rule MR No No — TT — Resolved Aug 14, 2000 Lead and Copper Rule
Jan 1, 1999 Aug 14, 2000 Lead and Copper Rule MR No No — TT — Resolved Aug 14, 2000 Lead and Copper Rule
Jan 1, 1999 Dec 31, 1999 BHC-GAMMA MR No Yes — 0.0002 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Simazine MR No Yes — 0.004 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Simazine MR No Yes — 0.004 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Chlordane MR No Yes — 0.002 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Chlordane MR No Yes — 0.002 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Toxaphene MR No Yes — 0.003 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 LASSO MR No Yes — — — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 LASSO MR No Yes — — — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Endrin MR No Yes — 0.002 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Endrin MR No Yes — 0.002 mg/L — Resolved Dec 31, 1999 Synthetic Organic Chemicals
Jan 1, 1995 Dec 31, 1995 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 1995 Nitrate Rule
Jan 1, 1995 Dec 31, 1995 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 1995 Nitrate Rule
Nov 7, 1989 Nov 6, 1992 Barium MR No Yes — 2 mg/L — Resolved Nov 6, 1992 Inorganic Chemicals
Nov 7, 1989 Nov 6, 1992 Arsenic MR No Yes — 0.010 mg/L — Resolved Nov 6, 1992 Arsenic Rule
Nov 7, 1989 Nov 6, 1992 Selenium MR No Yes — 0.05 mg/L — Resolved Nov 6, 1992 Inorganic Chemicals
Nov 7, 1989 Nov 6, 1992 Chromium MR No Yes — 0.1 mg/L — Resolved Nov 6, 1992 Inorganic Chemicals
Nov 7, 1989 Nov 6, 1992 Chromium MR No Yes — 0.1 mg/L — Resolved Nov 6, 1992 Inorganic Chemicals
Nov 7, 1989 Nov 6, 1992 Cadmium MR No Yes — 0.005 mg/L — Resolved Nov 6, 1992 Inorganic Chemicals
Sep 21, 1988 Sep 20, 1992 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Sep 20, 1992 Radionuclides and Revised Rad Rule
Sep 21, 1988 Sep 20, 1992 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 20, 1992 Radionuclides and Revised Rad Rule
Jul 1, 1976 Jun 30, 1980 Combined Radium (-226 and -228) MR No No — 5 pCi/L — Archived Jun 30, 1980 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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