Wednesday, April 18, 2018 Leaf Collection Week January 12, 2018 Email Ukiah Waste Services offers leaf collection to residents two times per year. During leaf collection weeks, residents can put out up to 7 additional bags or a 32 gallon can of leaves on their normal collection day. Leaf collection takes place during the third week of April and the week after Thanksgiving. 2018 Dates April 16-20November 26-30