Water Use Rules in King County, WA (2026)

1 county-level rule, plus city-specific rules for 5 cities in King County, Washington.

Verified from official government sources

Note: These county rules apply to unincorporated areas of King County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Recycled Water Rules

King County's wastewater utility must actively pursue reclaimed water reuse and keeps exclusive ownership of all reclaimed water its treatment plants produce.

King County Recycled Water Reuse Rules

Some Restrictions

King County Code § 28.86.100 (WRP-1, WRP-10)

WRP-1: King County shall actively pursue the use of reclaimed water while protecting the public health and safety and the environment... WRP-10: King County shall hold and maintain the exclusive right to any reclaimed water generated by the wastewater treatment plants of King County.

Full ordinance details →Official source ↗

Water Use Rules by City in King County

5 cities in King County have their own water use rules rules. Each link goes to that city's dedicated page with code citations.

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