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MID-PENINSULA WATER DISTRICT

California — Community Water System — PWSID: CA4110001

System Information

PWSIDCA4110001
System NameMID-PENINSULA WATER DISTRICT
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedMar 22, 1979
Last ReportedNov 17, 2025

Location & Contact

StateCalifornia
CityBELMONT
ZIP Code94002
AddressP.O. Box 129
OrganizationWUELFING, KAT
Phone650-591-8941

Population & Service

Population Served30,609
Service Connections8,179

Drinking Water Violations (6)

This water system has 6 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
Mar 1, 2015 Mar 31, 2015 Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2015 Surface Water Treatment Rule
Mar 1, 2015 Mar 31, 2015 Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2015 Surface Water Treatment Rule
Dec 1, 2002 Dec 31, 2002 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Dec 31, 2002 Total Coliform Rule
Dec 1, 2002 Dec 31, 2002 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Dec 31, 2002 Total Coliform Rule
Dec 1, 2001 Dec 31, 2001 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Dec 31, 2001 Total Coliform Rule
Dec 1, 2001 Dec 31, 2001 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Dec 31, 2001 Total Coliform 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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