Public water system · WA5371650
ActiveRedmond Water System City of
At a glance
City of Redmond Water System (PWSID WA5371650) is an active community water system in King County, Washington. It reports serving 163,335 people through 40,978 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 July 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
163,335
Service connections
40,978
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does City of Redmond Water System compare with other water systems in King County?
By EPA's size categories, City of Redmond Water System is a very large system (more than 100,000 people). King County has 214 active public water systems, and City of Redmond Water System is the 4th-largest of them by population served. Its population served is about 11 times the county average of 15,523 people per system, and accounts for 4.9% 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 City of Redmond Water System is about 24 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 City of Redmond Water System?
EPA lists City of Redmond Water System 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 City of Redmond Water System have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2015. By type: 1 public notice, recordkeeping or other. The contaminant or rule involved is Consumer Confidence Rule. EPA lists 1 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2015-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
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.
City of Redmond Water System: frequently asked questions
Who runs City of Redmond Water System?
City of Redmond Water System (PWSID WA5371650) is a community water system owned by a local government. It is regulated by the WA state drinking water program.
How many people does City of Redmond Water System serve?
City of Redmond Water System reports serving 163,335 people through 40,978 service connections in King County, Washington.
Where does City of Redmond Water System 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 City of Redmond Water System 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 July 2015. 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 City of Redmond Water System'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 July 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find City of Redmond Water System's water quality report?
As a community water system, City of Redmond Water System 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 |
| Lakehaven Water and Sewer District | King | 148,809 | Community | Purchased surface water |
| Renton City of | King | 108,091 | Community | Groundwater |
| Auburn City of | King | 107,655 | Community | Groundwater |
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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, “Redmond Water System City of, PWSID WA5371650, Washington”, https://aquacensus.com/water-systems/washington/redmond-water-system-city-of-wa5371650 (data as of October 1, 2026).