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NAPA, CITY OF

California — Community Water System — PWSID: CA2810003

System Information

PWSIDCA2810003
System NameNAPA, 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
CityNAPA
ZIP Code94559
AddressP.O. BOX 660
OrganizationKEBBAS, ERIN
Phone707-253-0822

Population & Service

Population Served84,804
Service Connections25,376

Drinking Water Violations (15)

This water system has 15 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
Jan 1, 2016 Mar 31, 2016 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Apr 16, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Apr 16, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 Dec 31, 2015 TTHM MCL Yes No .0957 MG/L 0.080 mg/L .08 Resolved Apr 16, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2015 Sep 30, 2015 TTHM MCL Yes No .0815 MG/L 0.080 mg/L .08 Resolved Apr 16, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2015 Sep 30, 2015 TTHM MCL Yes No .0815 MG/L 0.080 mg/L .08 Resolved Apr 16, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2015 Jun 30, 2015 TTHM MCL Yes No .097 MG/L 0.080 mg/L .08 Resolved Apr 16, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2015 Jun 30, 2015 TTHM MCL Yes No .097 MG/L 0.080 mg/L .08 Resolved Apr 16, 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
Jul 1, 2013 Sep 30, 2013 Total Haloacetic Acids (HAA5) MCL Yes No .062 MG/L 0.060 mg/L .06 Resolved Sep 30, 2013 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 Total Haloacetic Acids (HAA5) MCL Yes No .062 MG/L 0.060 mg/L .06 Resolved Sep 30, 2013 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 1995 Apr 30, 1995 Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 1995 Surface Water Treatment Rule
Apr 1, 1995 Apr 30, 1995 Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 1995 Surface Water Treatment Rule
Aug 1, 1988 Aug 31, 1988 Other No No — — — Archived Aug 31, 1988 Miscellaneous Other Rules
Jul 1, 1988 Jul 31, 1988 Other No No — — — Archived Jul 31, 1988 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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