Bulletin Board Annual Household Hazardous Waste Day / Dia anual de residuos peligrosos June 23, 2022 by Yahya Noor Mark your calendars! On July 23rd from 9am-1pm, Chelsea residents have the opportunity to dispose of items that do not belong in the trash like oil, paint, batteries, and more. Join GreenRoots in disposing of these hazardous items safely.