Maggie Morehouse is an environmental health specialist II with the Environmental Health Division of Thurston County, Washington, and is the division’s dye test lead and trainer. She has 15 years of experience in dye-testing, including public health roles in Kitsap and Pierce counties. She was recently elected to the Washington On-Site Sewage Association Board Regulatory Authority.Pumper: What is dye-testing designed to accomplish?Morehouse: A dye test in Thurston County is designed to find and identify onsite septic systems whose sewage is reaching a body of water before being fully treated. We’re specifically concerned about two Marine Recovery Areas — areas where














