Formal Draft Comment Period

The draft permit and supporting documents are available for review on the Construction Stormwater General Permit webpage.

The permit

Stormwater runoff from construction site activities disturb the land and, when it rains, can carry muddy water, debris, and chemicals into local waterways. Sediment, chemicals, and debris can harm aquatic life and reduce water quality.

The Construction Stormwater General Permit assures that operators of regulated construction sites develop stormwater pollution-prevention plans and implement sediment, erosion, and pollution-prevention control measures to protect the waters of Washington.

Public involvement

The current permit was last issued Jan. 1, 2021 and is scheduled to expire Dec. 31, 2025. Our public comment period invites you to provide input directly to Ecology. After the close of the public comment period, we will prepare a response to comments, describe any changes to the draft permit, and decide on permit reissuance. We expect to reissue the final permit late 2025.