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Public water system record

King County Water District #20

Serves Burien, Boulevard Park, SeaTac and 1 more place, King County, WA · 38,974 people served

Federal records show no health-based violations and no monitoring or reporting issues for King County Water District #20 in the last ten years.

  • WA5338950
  • SEATTLE
  • WA
  • 38,974 served

System profile

Source water Purchased surface water
ZIP 98168
EPA system ID WA5338950

Verify this system on EPA ECHO →

Health-based violations, last 10 years
0
Resolved
0
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
0

Key facts

  • King County Water District #20 buys its water from Seattle Public Utilities.
  • Record on file since 2003, with 1 health-based violation before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 10,748 service lines.

Check whether King County Water District #20 serves your address

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

None since October 2016, and no monitoring or reporting violations either.

Full record since 2003

EPA's records for King County Water District #20 go back to 2003. Before October 19, 2016 they list 1 health-based violation (1 archived by EPA without a recorded fix) and no monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 1 0

Most recent health-based violation before October 19, 2016: Total Coliform, began July 2003, Archived.

Show the health-based violation before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 Jul 1, 2003 Archived

Where the water comes from

King County Water District #20 buys its water from Seattle Public Utilities. It lists no wells or intakes of its own. It also has emergency connections to King County Water District #125, King County Water District #49 and Highline Water District. 2 other community water systems buy water from King County Water District #20. 1 other public water system has an emergency connection to King County Water District #20.

Buys water from

Emergency or part-time connections to

Community systems that buy water from it

Annual water quality report

King County Water District #20 must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Washington.

Certified drinking water labs by state EPA guidance for private wells