Washington Water Systems

Washington public water system directory

This directory lists the public water system profiles currently available for Washington. It is not a complete statewide inventory, and it is not an address-level service lookup.

Compare Systems

3 available Washington system records

Compare the PWSID, linked community, source-water context, and report year currently available for each Washington record.

All systems are shown.

PWSIDSystemCitiesCountiesSource waterViolation records shownLatest CCR
WA5377050SEATTLE PUBLIC UTILITIESSeattleNot verifiedCedar River and South Fork Tolt River surface-water supplies; the 2025 report lists a 62%/38% source mixNo violation records shown in available records2025
WA5383100SPOKANE CITY OFSpokaneNot verifiedGroundwater from the Spokane Valley-Rathdrum Prairie AquiferNo violation records shown in available records2025
WA5386800TACOMA WATER DIVISION CITY OFTacomaNot verifiedGreen River surface water with supporting groundwater; the 2025 report says groundwater typically provides 4% to 11% of annual demandNo violation records shown in available records2025
PWSIDWA5377050
SystemSEATTLE PUBLIC UTILITIES
CitiesSeattle
CountiesNot verified
Source waterCedar River and South Fork Tolt River surface-water supplies; the 2025 report lists a 62%/38% source mix
Violation records shownNo violation records shown in available records
Latest CCR2025
PWSIDWA5383100
SystemSPOKANE CITY OF
CitiesSpokane
CountiesNot verified
Source waterGroundwater from the Spokane Valley-Rathdrum Prairie Aquifer
Violation records shownNo violation records shown in available records
Latest CCR2025
PWSIDWA5386800
SystemTACOMA WATER DIVISION CITY OF
CitiesTacoma
CountiesNot verified
Source waterGreen River surface water with supporting groundwater; the 2025 report says groundwater typically provides 4% to 11% of annual demand
Violation records shownNo violation records shown in available records
Latest CCR2025

Profiles

Open a Washington public water system profile

Each of these 3 profiles keeps its source links, annual-report details, limitations, and summarized CCR entries together.

Last updated: EPA data

SEATTLE PUBLIC UTILITIES

PWSID WA5377050

View system profile

System-level profile for Seattle. Use it to review report-year context, source links, available violation records, contaminant relationships, and limitations.

System type
Communities
Seattle
Counties
County not listed
Latest CCR
2025
Last updated: EPA data

SPOKANE CITY OF

PWSID WA5383100

View system profile

System-level profile for Spokane. Use it to review report-year context, source links, available violation records, contaminant relationships, and limitations.

System type
Communities
Spokane
Counties
County not listed
Latest CCR
2025
Last updated: EPA data

TACOMA WATER DIVISION CITY OF

PWSID WA5386800

View system profile

System-level profile for Tacoma. Use it to review report-year context, source links, available violation records, contaminant relationships, and limitations.

System type
Communities
Tacoma
Counties
County not listed
Latest CCR
2025