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Water Quality Program

Proposed Puget Sound No Discharge Zone for vessel sewage

The U.S. Environmental Protection Agency has reviewed our petition and has determined that a no discharge zone can be established for Puget Sound. EPA found that there are adequate facilities in the Puget Sound for vessels to pump out their sewage and are accepting public comments. > NDZ status and next steps

What is a No Discharge Zone?

A No Discharge Zone (NDZ) is a designated body of water where the discharge of sewage from boats, whether treated or not, is prohibited.
> Read our overview of why this is important

Ecology Issues Final Petition to EPA

On July 21, 2016, Ecology issued a final petition to EPA.
> Read the petition and > supplemental letter requested by EPA


Direct discharges from vessels can magnify Puget Sound’s unique sensitivity to pollution.

After evaluating the appropriateness and feasibility, Ecology has issued a Final Petition to EPA to establish a NDZ in Puget Sound to protect water quality and public health.

Read the reports and Studies related to the NDZ.

Quick facts and answers to questions about the NDZ.