I live at a property of 4 bungalows. We are all on 1 water meter. We have all been told by the property owner that our monthly charge for water is going up because of higher use. My neighbors and I believe it to be the fault of one bungalow's occupant. Is there something on the market that we can attach to the main coming into our homes that will monitor how much we are using?
You will want to be very careful about installing and changing things on the property since you are not the property owner. If it comes down to needing to have individual water meters at each unit the best thing would be to work out an agreement with the owner to switch over to actual usage billing.
Part of the negotiation process could be agreement that the various tenants will chip for part of the cost of the meters.