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ST. STEPHENS INDIAN MISSION, INC.

Wyoming — Transient Non-Community — PWSID: 085690010

System Information

PWSID085690010
System NameST. STEPHENS INDIAN MISSION, INC.
System TypeTransient Non-Community
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region08
Serves SchoolYes
WholesalerNo
First ReportedAug 4, 2004
Last ReportedNov 17, 2025

Location & Contact

StateWyoming
CityST. STEPHENS
ZIP Code82524
AddressP.O. Box 250
OrganizationGREEN, GAVIN
Phone—

Population & Service

Population Served62
Service Connections10

Drinking Water Violations (105)

This water system has 105 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
Sep 1, 2024 Sep 30, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2024 Revised Total Coliform Rule
Jun 1, 2024 Jun 30, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2024 Revised Total Coliform Rule
Jan 1, 2024 Dec 31, 2024 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Jan 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jan 31, 2024 Revised Total Coliform Rule
Dec 1, 2023 Dec 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2023 Revised Total Coliform Rule
Nov 1, 2023 Nov 30, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2023 Revised Total Coliform Rule
Aug 1, 2023 Aug 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2023 Revised Total Coliform Rule
Jan 1, 2023 Dec 31, 2023 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2023 Nitrate Rule
Jan 1, 2021 Jan 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Jan 31, 2021 Revised Total Coliform Rule
Nov 1, 2020 Nov 30, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2020 Revised Total Coliform Rule
Aug 1, 2020 Aug 31, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2020 Revised Total Coliform Rule
Jan 1, 2020 Dec 31, 2020 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2020 Nitrate Rule
Jun 1, 2019 Jun 30, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2019 Revised Total Coliform Rule
Dec 1, 2013 Dec 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2013 Total Coliform Rule
Oct 1, 2013 Dec 31, 2013 Radium-226 MR No Yes — — — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Radium-226 MR No Yes — — — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Radium-226 MR No Yes — — — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Radium-226 MR No Yes — — — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Radium-228 MR No Yes — — — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Radium-228 MR No Yes — — — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Radium-228 MR No Yes — — — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Radium-228 MR No Yes — — — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Radium-226 MR No Yes — — — Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Radium-228 MR No Yes — — — Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Combined Uranium MR No Yes — 30 ug/L — Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Combined Uranium MR No Yes — 30 ug/L — Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Radium-226 MR No Yes — — — Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Radium-226 MR No Yes — — — Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Radium-228 MR No Yes — — — Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Radium-228 MR No Yes — — — Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 — Consumer Confidence Rule Other No No — — — Resolved May 22, 2014 Consumer Confidence Rule
Jul 1, 2012 Sep 30, 2012 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2012 Total Coliform Rule
Jul 1, 2012 Sep 30, 2012 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2012 Total Coliform Rule
Jul 1, 2012 Sep 30, 2012 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2012 Total Coliform Rule
Jan 1, 2012 Dec 31, 2012 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2012 Nitrate Rule
Jan 1, 2012 Dec 31, 2012 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2012 Nitrate Rule
Jan 1, 2011 Dec 31, 2013 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Endothall MR No Yes — 0.1 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Dalapon MR No Yes — 0.2 mg/L — Resolved Dec 31, 2013 Synthetic 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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