Public Water Partners

Seattle, WA · King County

KING COUNTY WATER DISTRICT #20 Water System

Consumer Confidence Report status

KING COUNTY WATER DISTRICT #20 must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for KING COUNTY WATER DISTRICT #20.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Washington’s official records. Always confirm current status with Washington before making decisions based on this information.

System facts

System ID (PWSID)
WA5338950
System type
Community Water System
Population served
48,469
Service connections
14,783
Ownership
local government
Water source
surface water (rivers, lakes, or reservoirs)

KING COUNTY WATER DISTRICT #20 is one of 111 community water systems in Washington in the 10,001 to 100,000 people size category, serving 48,469 people from surface water.

As of August 1, 2026, its federal record holds 1 entry in 2003, all of which EPA lists as closed. Nothing has been added since 2003.

None of the 1 are monitoring or reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset; these involve water-quality, treatment, or public-notice findings instead. The record involves the Total Coliform Rules.

Violation history

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 2003 – July 31, 2003

    Archived

Archived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

No enforcement actions on record for this system.

Common questions

Is KING COUNTY WATER DISTRICT #20 required to publish a Consumer Confidence Report?

Yes. KING COUNTY WATER DISTRICT #20 is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is KING COUNTY WATER DISTRICT #20’s next Consumer Confidence Report due?

KING COUNTY WATER DISTRICT #20’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does KING COUNTY WATER DISTRICT #20 have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for KING COUNTY WATER DISTRICT #20.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

KING COUNTY WATER DISTRICT #20

Phone not on record

Seattle, WA 98168