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DAVE JOHNSTON POWER PLANT

Wyoming — Non-Transient Non-Community — PWSID: WY5600291

System Information

PWSIDWY5600291
System NameDAVE JOHNSTON POWER PLANT
System TypeNon-Transient Non-Community
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1979
Last ReportedNov 17, 2025

Location & Contact

StateWyoming
CityGLENROCK
ZIP Code82637
Address1591 Tank Farm Road
OrganizationSAUL, ANNE
Phone307-995-5055

Population & Service

Population Served165
Service Connections3

Drinking Water Violations (29)

This water system has 29 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
Apr 1, 2022 Jun 30, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2016 Jun 30, 2016 TTHM MCL Yes No .093 MG/L 0.080 mg/L .08 Resolved Jun 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2016 Jun 30, 2016 TTHM MCL Yes No .093 MG/L 0.080 mg/L .08 Resolved Jun 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 TTHM MCL Yes No .093 MG/L 0.080 mg/L .08 Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 TTHM MCL Yes No .093 MG/L 0.080 mg/L .08 Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2015 Nov 30, 2015 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2015 Long Term 2 Enhanced Surface Water Treatment Rule
Nov 1, 2015 Nov 30, 2015 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2015 Long Term 2 Enhanced Surface Water Treatment Rule
Nov 1, 2015 Nov 30, 2015 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2015 Long Term 2 Enhanced Surface Water Treatment Rule
Oct 1, 2015 Dec 31, 2015 TTHM MCL Yes No .099 MG/L 0.080 mg/L .08 Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 Oct 31, 2015 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Oct 31, 2015 Long Term 2 Enhanced Surface Water Treatment Rule
Oct 1, 2015 Oct 31, 2015 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Oct 31, 2015 Long Term 2 Enhanced Surface Water Treatment Rule
Oct 1, 2015 Oct 31, 2015 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Oct 31, 2015 Long Term 2 Enhanced Surface Water Treatment Rule
Oct 1, 2015 Oct 31, 2015 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2015 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2015 Oct 31, 2015 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2015 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2015 Dec 31, 2015 TTHM MCL Yes No .099 MG/L 0.080 mg/L .08 Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2015 Sep 30, 2015 TTHM MCL Yes No .084 MG/L 0.080 mg/L .08 Resolved Sep 30, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2015 Sep 30, 2015 TTHM MCL Yes No .084 MG/L 0.080 mg/L .08 Resolved Sep 30, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2013 Oct 31, 2013 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Oct 31, 2013 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2013 Oct 31, 2013 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Oct 31, 2013 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2013 Oct 31, 2013 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Oct 31, 2013 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2011 Mar 31, 2011 TTHM MCL Yes No .084 MG/L 0.080 mg/L .08 Resolved Mar 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2011 Mar 31, 2011 TTHM MCL Yes No .084 MG/L 0.080 mg/L .08 Resolved Mar 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2010 Dec 31, 2010 TTHM MCL Yes No .0983 MG/L 0.080 mg/L .08 Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2010 Dec 31, 2010 TTHM MCL Yes No .0983 MG/L 0.080 mg/L .08 Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010 Sep 30, 2010 TTHM MCL Yes No .1135 MG/L 0.080 mg/L .08 Resolved Sep 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010 Sep 30, 2010 TTHM MCL Yes No .1135 MG/L 0.080 mg/L .08 Resolved Sep 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 TTHM MCL Yes No .102 MG/L 0.080 mg/L .08 Archived Jun 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2005 Jun 30, 2005 TTHM MCL Yes No .091 0.080 mg/L .08 Resolved Jun 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2005 Jun 30, 2005 Total Haloacetic Acids (HAA5) MCL Yes No .069 0.060 mg/L .06 Resolved Jun 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts 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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