Our evaluation includes further science-based studies and reports such as:
- This report includes sample results, including fecal coliform, for type II marine sanitation devices water from small cruise ships in Alaska for each year. The most recent report (2013) includes results ranging from 0.0 to 4.6 million fecal coliform per 100 milliliters.
- A study of potential human health impacts from virus discharges of large passenger vessels. These results show that if advanced wastewater treatment systems malfunction, virus discharges from cruise ships may reach some shellfish beds at levels that might lead to illness.
- An assessment of five cruise ship waste streams.
- We investigated how waters move in Puget Sound and the Salish Sea to address questions related to the No Discharge Zone petition.
- A study evaluating the effectiveness of type I Marine Sanitation Devices (MSDs) in reducing fecal coliform bacteria and solids.
Sound waters as a no discharge zone
- An assessment of water quality impacts from untreated sewage discharges, differences in water quality inside versus outside the marina, and during high versus low usage. The results showed higher levels of fecal coliform bacteria inside marinas compared to areas outside the marinas and higher during weekend events.
Puget Sound NDZ Commercial Vessel Economic Evaluation Memorandum
- We received more than 26,000 comments. We reviewed, organized, and responded to the comments.
No Discharge Zone Implementation Strategy, A Framework for Action
- This memorandum summarizes an evaluation of potential cost impacts of a no discharge zone for commercial tug and fishing boats and small passenger vessels.
- This report lays out the education, outreach, and enforcement strategy for implementing a no discharge zone in Puget Sound.