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Public water system record

Highline Water District

Serves SeaTac, Des Moines, Normandy Park and 4 more places, King County, WA · 100,170 people served

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

  • WA5340650
  • KENT
  • WA
  • 100,170 served

System profile

Source water Purchased surface water
ZIP 98032
EPA system ID WA5340650

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

  • Highline Water District draws water from 5 wells (1 of them for emergency, seasonal or other part-time use).
  • Record on file since 1991, with 3 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 18,780 service lines.

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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 1991

EPA's records for Highline Water District go back to 1991. Before October 19, 2016 they list 3 health-based violations (3 archived by EPA without a recorded fix) and no monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 3 0

Most recent health-based violation before October 19, 2016: Total Coliform, began January 1992, Archived.

Show all 3 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 Jan 1, 1992 Archived
Total Coliform
Contaminant limit exceeded
 Dec 1, 1991 Archived
Total Coliform
Contaminant limit exceeded
 Nov 1, 1991 Archived

Where the water comes from

Highline Water District draws water from 5 wells (1 of them for emergency, seasonal or other part-time use). It also buys water from King County Water District #49, King County Water District #20 and Seattle Public Utilities. It also has emergency connections to Tukwila Water Department and Lakehaven Water and Sewer District. 1 other community water system buys water from Highline Water District. 6 other public water systems have emergency, seasonal or other part-time connections to Highline Water District.

Buys water from

Emergency or part-time connections to

Community systems that buy water from it

Annual water quality report

Highline Water District 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