Publications Home || Browse by topic || Browse by program || Ecology website

Publication Summary

Our Ecology website has changed, which can cause broken links.
To report these, please contact us with the publication and broken link.


Dioxin in Surface Water Sources to Oakland Bay (Mason County)

Publication number Date Published
13-03-022May 2013
VIEW NOW Dioxin in Surface Water Sources to Oakland Bay (Mason County) (Number of pages: 44) (Publication Size: 10484KB)

Trouble viewing? Try these free options.
Author(s) Coots, R.
Description In 2011, dioxin measured from Shelton, Goldsborough, and Johns Creek sediments were generally low, much lower than surface sediments reported from Shelton Harbor or Oakland Bay in 2008. Study results showed these surface water inputs do not currently appear to be the source of the bay-wide dioxin levels.

Two soil samples from an ash mound along Shelton Creek were also analyzed. They had the highest dioxin concentrations reported for the study, more similar to mean values from Shelton Harbor and Oakland Bay than from Shelton, Goldsborough, or Johns Creeks.

Sampling was conducted following the dry season. Wet-season wash off and storm events could exacerbate dioxin loading. Recommendations are made to determine the ash mound contaminant extent and monitoring to verify improvement.
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

ADA Accessibility
The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188.
Visit Ecology’s website for more information.
Contact Randy Coots at 360-407-6690 or
Keywords Shelton Harbor, Oakland Bay, surface water, Puget Sound, dioxin
WATERSHED Water Resource Inventory Area 14 Kennedy-Goldsborough
DATA Environmental Information Management (EIM) #rcoo0012