An ordinance relating to the 2026 Stormwater Code Update; updating stormwater control requirements for development, roadways, utilities, and maintenance activities; strengthening stormwater treatment and infiltration standards; clarifying vesting and review thresholds; ensuring the City’s compliance with requirements of the City’s 2024-2029 Phase 1 Municipal Stormwater Permit issued by the State Department of Ecology; and amending Chapters 22.800, 22.801, 22.802, 22.803, 22.805, and 22.807 of the Seattle Municipal Code.

Committee

City Clerk

Requested by

Seattle Public Utilities

Introduced

March 6, 2026

On agenda

June 2, 2026

Passed

June 4, 2026

Enactment no.

Ord 127444

Where it was heard

City Council Jun 2, 2026 passed as amended Pass Governance and Utilities Committee May 14, 2026 pass as amended Pass Governance and Utilities Committee Apr 9, 2026 discussed

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