The number of trash cans required is based on a ratio 35 gallons of capacity per four (4) occupants. The total size of containers is not dictated by the ordinance and will more than likely be specified by your trash service pickup provider. However, remember that if you have a house that is certified at a capacity of 17 people that would equal 148.75 gallons of total capacity, and you should always round up to the next higher number. In this case, it would be 149 gallons of total trash capacity. As always please ensure that you are following and educating guests about all local HOA and or city ordinances related to trash collection days and times as well as storage of trash containers.