If you are just closing escrow on home, make sure you call the first two numbers for your new home asap. You need to have both of these in place prior to the close of escrow. As far as the sewer, you do not need to contact anyone, the title company will handle it for you, through the closing. As far as the waste management (Reno Disposal) you would normally wait about 2 weeks after you close escrow to contact them. They will not have record of you until that time, you will still be able to put your garbage at the curb as soon as you move in.