what are the laws for multi house water bills? the landlord just devides up the bill among the 4 rental properties and gives me a random bill. No details or meter readings for my house. Help!

i've asked him verbally and in written form for details of the bill,he says he'll get it to me but then enver does. Yet he expects the money. He also waits 9 months or so to give me the bill and then wants a large lump some of $900 or more. I can't get a hold of anyone at the tenet union for Seattle and I utility company said they couldn't tell me anything.