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TRINIDAD, CITY OF

California — Community Water System — PWSID: CA1210018

System Information

PWSIDCA1210018
System NameTRINIDAD, CITY OF
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedMar 22, 1979
Last ReportedNov 17, 2025

Location & Contact

StateCalifornia
CityTRINIDAD
ZIP Code95570
AddressP.O. BOX 390
OrganizationTAGLIABOSCHI, JOE
Phone707-677-0223

Population & Service

Population Served1,072
Service Connections324

Drinking Water Violations (21)

This water system has 21 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, 2024 May 1, 2024 Revised Total Coliform Rule MON No No — — — Resolved May 1, 2024 Revised Total Coliform Rule
Apr 1, 2024 May 1, 2024 Revised Total Coliform Rule MON No No — — — Resolved May 1, 2024 Revised Total Coliform Rule
Oct 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Dec 31, 2022 Lead and Copper Rule
Oct 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Dec 31, 2022 Lead and Copper Rule
Oct 1, 2019 Dec 31, 2019 Chlorine MRDL Yes No — 4.0 mg/L — Resolved Dec 31, 2019 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 Chlorine MRDL Yes No — 4.0 mg/L — Resolved Dec 31, 2019 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jun 1, 2019 Jun 30, 2019 Revised Total Coliform Rule MON No No — — — Resolved Jun 30, 2019 Revised Total Coliform Rule
Oct 1, 2014 Dec 31, 2014 Total Haloacetic Acids (HAA5) MCL Yes No .063 MG/L 0.060 mg/L .06 Resolved Dec 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2014 Dec 31, 2014 Total Haloacetic Acids (HAA5) MCL Yes No .063 MG/L 0.060 mg/L .06 Resolved Dec 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2010 Dec 31, 2010 Total Haloacetic Acids (HAA5) MCL Yes No .073 MG/L 0.060 mg/L .06 Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2010 Dec 31, 2010 Total Haloacetic Acids (HAA5) MCL Yes No .073 MG/L 0.060 mg/L .06 Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 Total Haloacetic Acids (HAA5) MCL Yes No .169 MG/L 0.060 mg/L .06 Resolved Jun 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 Total Haloacetic Acids (HAA5) MCL Yes No .169 MG/L 0.060 mg/L .06 Resolved Jun 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2009 Jun 30, 2009 Total Haloacetic Acids (HAA5) MCL Yes No .076 MG/L 0.060 mg/L .06 Resolved Jun 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2009 Jun 30, 2009 Total Haloacetic Acids (HAA5) MCL Yes No .076 MG/L 0.060 mg/L .06 Resolved Jun 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2001 Dec 31, 2001 Surface Water Treatment Rule TT Yes No — — — Resolved Dec 31, 2001 Surface Water Treatment Rule
Aug 1, 2001 Dec 31, 2001 Surface Water Treatment Rule TT Yes No — — — Resolved Dec 31, 2001 Surface Water Treatment Rule
Jan 1, 1994 Jan 31, 1994 Surface Water Treatment Rule MR No No — — — Resolved Jan 31, 1994 Surface Water Treatment Rule
Jan 1, 1994 Jan 31, 1994 Surface Water Treatment Rule MR No No — — — Resolved Jan 31, 1994 Surface Water Treatment Rule
Jun 1, 1993 Jun 30, 1993 Surface Water Treatment Rule TT Yes No — — — Resolved Jun 30, 1993 Surface Water Treatment Rule
Aug 1, 1983 Aug 31, 1983 Other No No — — — Archived Aug 31, 1983 Miscellaneous Other Rules

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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