Public water system · WA5338900

Active

Water District 19

At a glance

Water District 19 (PWSID WA5338900) is an active community water system in King County, Washington. It reports serving 5,335 people through 1,704 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2025.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

5,335

Service connections

1,704

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDWA5338900

System typeCommunity water system

Activity statusActive

Population served5,335

Service connections1,704

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyWA state drinking water program

City served—

StateWashington

ZIP—

CountyKing County

How does Water District 19 compare with other water systems in King County?

By EPA's size categories, Water District 19 is a medium system (3,301 to 10,000 people). King County has 214 active public water systems. Its population served is about 66% below the county average of 15,523 people per system, and accounts for 0.2% 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 Water District 19 is about 20% below 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 140 Washington systems (3%) list surface water as their primary source.

Who owns and regulates Water District 19?

EPA lists Water District 19 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 Water District 19 have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2025. The violations listed here began between January 2020 and August 2025. By type: 10 monitoring and reporting, 1 required treatment not met and 1 contaminant level above the legal limit. The contaminants or rules involved are Long Term 2 Enhanced Surface Water Treatment Rule, Haloacetic acids (HAA5), 1,2-Dichloropropane and Ethylbenzene. EPA lists 12 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
2025-08-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	Yes	Resolved
2020-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	1,2-Dichloropropanecode 2983	No	Resolved
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	Ethylbenzenecode 2992	No	Resolved
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	cis-1,2-Dichloroethylenecode 2380	No	Resolved
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	p-Dichlorobenzenecode 2969	No	Resolved
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	1,1,2-Trichloroethanecode 2985	No	Resolved
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	Benzenecode 2990	No	Resolved
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	Tetrachloroethylenecode 2987	No	Resolved
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	Vinyl chloridecode 2976	No	Resolved
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	Carbon tetrachloridecode 2982	No	Resolved
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	o-Dichlorobenzenecode 2968	No	Resolved

The 12 most recent violations in EPA's records, newest first.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.

Water District 19: frequently asked questions

Who runs Water District 19?

Water District 19 (PWSID WA5338900) is a community water system owned by a local government. It is regulated by the WA state drinking water program.

How many people does Water District 19 serve?

Water District 19 reports serving 5,335 people through 1,704 service connections in King County, Washington.

Where does Water District 19 get its water?

EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.

Does Water District 19 have any drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2025. 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 Water District 19'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. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.

Where can I find Water District 19's water quality report?

As a community water system, Water District 19 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

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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, “Water District 19, PWSID WA5338900, Washington”, https://aquacensus.com/water-systems/washington/water-district-19-wa5338900 (data as of October 1, 2026).