Water Quality photo identifier

Water Quality Program

Proposed Puget Sound No Discharge Zone for vessel sewage

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
Stay updated on the NDZ status >

Commercial Vessel Pumpout: NEP Grant Funding Solicitation Round 2

Time to Apply for Round 2: Ecology is soliciting applications for National Estuary Program (NEP) grant funding for commercial vessel sewage disposal facilities or pumpout stations in Puget Sound. It is designed to assist in the installation of commercial pumpout stations to support sewage pumpout for certain commercial vessels.
See the Grant Fund Solicitation page for more information. >


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.