The Washington On-Site Sewage Association (WOSSA) is a professional organization representing all professions in the siting, design, installation, use and regulation of on-site wastewater systems that will treat and dispose of sewage in a safe, reliable and cost-effective way. WOSSA operates the Northwest On-Site Waste Water Training Center to serve as a resource center and to promote professional excellence. A schedule of classes is available at the WOSSA website.
Washington State Department of Health Standards & Guidance
The Jefferson County environmentally sensitive areas (ESA) mapping site project has been created to allow project proponents to get some idea of what issues might be involved on their land before they apply for a permit. View maps.
Access database tools for information about permits and cases, recorded and scanned documents, special reports and other pertinent data.