It depends. Hard to generalize on this, because some trash companies are small, some large. Some have transfer stations or dumps that are close; some are a long way away. Some trucks are full by noon and get emptied twice a day; some have routes that only fill them half way but because they are srpead out over a long distance take all day to travel. Asa rule of thumb, though, it is best to empty the truck at the end of the day. That way it can be maintained, if necessary, over night or in the morning. Plus, it keeps the truck from being infested overnight.