Public water system · WA5340100
ActiveSoos Creek Water & Sewer District
At a glance
Soos Creek Water & Sewer District (PWSID WA5340100) is an active community water system in King County, Washington. It reports serving 74,172 people through 23,903 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in December 1991.
This page covers its drinking water system only; sewer and wastewater service are not part of EPA's drinking water records.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
74,172
Service connections
23,903
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Soos Creek Water & Sewer District compare with other water systems in King County?
By EPA's size categories, Soos Creek Water & Sewer District is a large system (10,001 to 100,000 people). King County has 214 active public water systems. Its population served is about 4.8 times the county average of 15,523 people per system, and accounts for 2.2% of the 3,321,960 people reported by systems filed under the county. Across Washington, the 4,705 active systems average 2,172 people each. Nationally, the average active community water system reports serving 6,703 people, so Soos Creek Water & Sewer District is about 11 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Washington has 2,392 active community water systems, 51% of the state's 4,705 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 130 Washington systems (2.8%) list purchased surface water as their primary source.
Who owns and regulates Soos Creek Water & Sewer District?
EPA lists Soos Creek Water & Sewer District as owned by a local government. The WA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 58 of the 214 active systems in King County (27%) are also owned by a local government.
Does Soos Creek Water & Sewer District have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in December 1991. By type: 1 monitoring and reporting. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1991-12-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Archived |
The one violation in EPA's records.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Soos Creek Water & Sewer District: frequently asked questions
Who runs Soos Creek Water & Sewer District?
Soos Creek Water & Sewer District (PWSID WA5340100) is a community water system owned by a local government. It is regulated by the WA state drinking water program.
How many people does Soos Creek Water & Sewer District serve?
Soos Creek Water & Sewer District reports serving 74,172 people through 23,903 service connections in King County, Washington.
Where does Soos Creek Water & Sewer District get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Soos Creek Water & Sewer District have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in December 1991. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Soos Creek Water & Sewer District's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list one violation for this system; it is not health-based, and the most recent began in December 1991. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find Soos Creek Water & Sewer District's water quality report?
As a community water system, Soos Creek Water & Sewer District must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in King County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Seattle Public Utilities | King | 1,161,961 | Community | Surface water |
| Bellevue City of | King | 321,349 | Community | Purchased surface water |
| Kent Water Department | King | 166,421 | Community | Purchased surface water |
| Redmond Water System City of | King | 163,335 | Community | Purchased surface water |
| Lakehaven Water and Sewer District | King | 148,809 | Community | Purchased surface water |
| Renton City of | King | 108,091 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Soos Creek Water & Sewer District, PWSID WA5340100, Washington”, https://aquacensus.com/water-systems/washington/soos-creek-water-sewer-district-wa5340100 (data as of October 1, 2026).