CALISTOGA, CITY OF

California — Community Water System — PWSID: CA2810002

System Information

PWSIDCA2810002
System NameCALISTOGA, CITY OF
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedDec 2, 1981
Last ReportedNov 17, 2025

Location & Contact

StateCalifornia
CityCALISTOGA
ZIP Code94515
Address414 Washington Street
OrganizationRAYNER, DEREK
Phone707-942-2828

Population & Service

Population Served5,610
Service Connections2,229

Drinking Water Violations (30)

This water system has 30 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
Jul 1, 2023 Sep 30, 2023 Total Haloacetic Acids (HAA5) MCL Yes No 67.35 UG/L 0.060 mg/L 60 Resolved Sep 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2023 Sep 30, 2023 Total Haloacetic Acids (HAA5) MCL Yes No 67.35 UG/L 0.060 mg/L 60 Resolved Sep 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2023 Jun 30, 2023 Total Haloacetic Acids (HAA5) MCL Yes No 74.4 UG/L 0.060 mg/L 60 Resolved Jun 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2023 Jun 30, 2023 Total Haloacetic Acids (HAA5) MCL Yes No 74.4 UG/L 0.060 mg/L 60 Resolved Jun 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Mar 31, 2023 Total Haloacetic Acids (HAA5) MCL Yes No 71.95 UG/L 0.060 mg/L 60 Resolved Mar 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Mar 31, 2023 Total Haloacetic Acids (HAA5) MCL Yes No 71.95 UG/L 0.060 mg/L 60 Resolved Mar 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2018 Jun 30, 2018 Total Haloacetic Acids (HAA5) MCL Yes No .069 MG/L 0.060 mg/L .06 Resolved Jun 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2018 Jun 30, 2018 Total Haloacetic Acids (HAA5) MCL Yes No .069 MG/L 0.060 mg/L .06 Resolved Jun 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2018 Mar 31, 2018 Total Haloacetic Acids (HAA5) MCL Yes No .0621 MG/L 0.060 mg/L .06 Resolved Mar 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2018 Mar 31, 2018 Total Haloacetic Acids (HAA5) MCL Yes No .0621 MG/L 0.060 mg/L .06 Resolved Mar 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2017 Dec 31, 2017 Total Haloacetic Acids (HAA5) MCL Yes No .0622 MG/L 0.060 mg/L .06 Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2017 Dec 31, 2017 Total Haloacetic Acids (HAA5) MCL Yes No .0622 MG/L 0.060 mg/L .06 Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 Total Haloacetic Acids (HAA5) MCL Yes No .0615 MG/L 0.060 mg/L .06 Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 Total Haloacetic Acids (HAA5) MCL Yes No .0615 MG/L 0.060 mg/L .06 Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2016 Dec 31, 2016 Total Haloacetic Acids (HAA5) MCL Yes No .0635 MG/L 0.060 mg/L .06 Resolved Apr 1, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2016 Dec 31, 2016 Total Haloacetic Acids (HAA5) MCL Yes No .0635 MG/L 0.060 mg/L .06 Resolved Apr 1, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2016 Dec 31, 2016 Total Haloacetic Acids (HAA5) MCL Yes No .0635 MG/L 0.060 mg/L .06 Resolved Apr 1, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 Dec 31, 2015 TTHM MCL Yes No .0995 MG/L 0.080 mg/L .08 Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 Dec 31, 2015 TTHM MCL Yes No .0995 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 .089 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 .089 MG/L 0.080 mg/L .08 Resolved Sep 30, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2015 Jun 30, 2015 TTHM MCL Yes No .092 MG/L 0.080 mg/L .08 Resolved Jun 30, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2015 Mar 31, 2015 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Mar 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2015 Mar 31, 2015 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Mar 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2015 Mar 31, 2015 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Mar 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2011 Jan 31, 2011 Coliform (TCR) MR No No 5% of samples Resolved Jan 31, 2011 Total Coliform Rule
Jan 1, 2011 Jan 31, 2011 Coliform (TCR) MR No No 5% of samples Resolved Jan 31, 2011 Total Coliform Rule
Dec 1, 2008 Dec 31, 2008 Coliform (TCR) MCL Yes No 5% of samples Resolved Dec 31, 2008 Total Coliform Rule
Dec 1, 2008 Dec 31, 2008 Coliform (TCR) MCL Yes No 5% of samples Resolved Dec 31, 2008 Total Coliform Rule
Jun 1, 1995 Jun 30, 1995 Surface Water Treatment Rule TT Yes No Resolved Jun 30, 1995 Surface Water Treatment 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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