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HOLLISTER CITY OF

Idaho — Community Water System — PWSID: ID5420030

System Information

PWSIDID5420030
System NameHOLLISTER CITY OF
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedMar 13, 1980
Last ReportedDec 19, 2025

Location & Contact

StateIdaho
CityHOLLISTER
ZIP Code83301
Address2392 MAIN
OrganizationCITY OF HOLLISTER
Phone208-655-4220

Population & Service

Population Served220
Service Connections120

Drinking Water Violations (86)

This water system has 86 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 1, 2025 Jun 30, 2025 Chlorine MR No Yes — 4.0 mg/L — Archived Jun 30, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jun 1, 2025 Jun 30, 2025 Chlorine MR No Yes — 4.0 mg/L — Archived Jun 30, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jun 1, 2025 Jun 30, 2025 Revised Total Coliform Rule MON No Yes — — — Archived Jun 30, 2025 Revised Total Coliform Rule
Jun 1, 2025 Jun 30, 2025 Revised Total Coliform Rule MON No Yes — — — Archived Jun 30, 2025 Revised Total Coliform Rule
Jul 1, 2023 Sep 30, 2023 Chlorine MR No Yes — 4.0 mg/L — Archived Sep 30, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2023 Sep 30, 2023 Chlorine MR No Yes — 4.0 mg/L — Archived Sep 30, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2015 Jun 30, 2015 Nitrate MR No Yes — 10 mg/L — Resolved Jun 30, 2015 Nitrate Rule
Apr 1, 2015 Jun 30, 2015 Nitrate MR No Yes — 10 mg/L — Resolved Jun 30, 2015 Nitrate Rule
Apr 1, 2015 Jun 30, 2015 Nitrate MR No Yes — 10 mg/L — Resolved Jun 30, 2015 Nitrate Rule
Aug 1, 2014 Aug 31, 2014 Coliform (TCR) MCL Yes No — 5% of samples — Archived Aug 31, 2014 Total Coliform Rule
Aug 1, 2014 Aug 31, 2014 Coliform (TCR) MCL Yes No — 5% of samples — Archived Aug 31, 2014 Total Coliform Rule
Aug 1, 2014 Aug 31, 2014 Coliform (TCR) MCL Yes No — 5% of samples — Archived Aug 31, 2014 Total Coliform Rule
Jul 1, 2014 Sep 30, 2014 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2013 Dec 31, 2013 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2013 Stage 1 Disinfectants and Disinfection Byproducts 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 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 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2013 Dec 31, 2013 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2013 Dec 31, 2013 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2013 Stage 1 Disinfectants and Disinfection Byproducts 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
Apr 1, 2013 Jun 30, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2013 Radionuclides and Revised Rad Rule
Apr 1, 2013 Jun 30, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2013 Radionuclides and Revised Rad Rule
Apr 1, 2013 Jun 30, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2013 Radionuclides and Revised Rad Rule
Apr 1, 2013 Jun 30, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2013 Radionuclides and Revised Rad Rule
Apr 1, 2013 Jun 30, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2013 Radionuclides and Revised Rad Rule
Dec 1, 2012 Dec 31, 2012 Coliform (TCR) MR No No — 5% of samples — Archived Dec 31, 2012 Total Coliform Rule
Oct 1, 2012 Dec 31, 2012 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2012 Dec 31, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2012 Radionuclides and Revised Rad Rule
Oct 1, 2012 Dec 31, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2012 Radionuclides and Revised Rad Rule
Jul 1, 2012 Sep 30, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 30, 2012 Radionuclides and Revised Rad Rule
Jul 1, 2012 Sep 30, 2012 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2012 Sep 30, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 30, 2012 Radionuclides and Revised Rad Rule
Jul 1, 2012 Sep 30, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 30, 2012 Radionuclides and Revised Rad Rule
Jul 1, 2012 Sep 30, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 30, 2012 Radionuclides and Revised Rad Rule
Jul 1, 2012 Sep 30, 2012 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2012 Sep 30, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 30, 2012 Radionuclides and Revised Rad Rule
Jul 1, 2012 Sep 30, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Sep 30, 2012 Radionuclides and Revised Rad Rule
Jul 1, 2012 Sep 30, 2012 Radium-228 MR No Yes — — — Resolved Sep 30, 2012 Radionuclides and Revised Rad Rule
Jul 1, 2012 Sep 30, 2012 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2012 Sep 30, 2012 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2012 Sep 30, 2012 Radium-228 MR No Yes — — — Resolved Sep 30, 2012 Radionuclides and Revised Rad Rule
Apr 1, 2012 Jun 30, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2012 Radionuclides and Revised Rad Rule
Apr 1, 2012 Jun 30, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2012 Radionuclides and Revised Rad Rule
Apr 1, 2012 Jun 30, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2012 Radionuclides and Revised Rad Rule
Apr 1, 2012 Jun 30, 2012 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2012 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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