Renting Duplex . Water bill

How can I tell if the units are separatelly metered. I have been receiving water bills that seem pretty high. The agent does send me the water bill with the invoice. But the bill has the address and does not specify unit 1 or 2 on it. Could unit 2’s meter be a slave of the main meter and how can I find out. I asked the agent if they are seperate and they only responded asking for a photo of my meter.

Edit : So I just found the water meter that is near the st on the boundary of the property and the serial number on it matches the Utility Bill. No where does it indicate the meters that are on either side of the house for the 2 units.