Is this all under one meter, or does she have multiple meters?
You need to figure out how much is usage based, and how much is fixed fees. If she has multiple meters and some of the fees are per meter, it may be worth considering rearranging so there's fewer meters, although that may not be the best for future use.
My house on 9 acres has 3 meters. One for the house, one for the well, and one for an outbuilding that was built before the house and used to be a woodshop. This arrangement would be handy if we subdivided and shared the well, or rented the shop to someone. Otoh, it's not very handy because the house is on a automatic generator and when utility power goes out, we have no water.
You need to figure out how much is usage based, and how much is fixed fees. If she has multiple meters and some of the fees are per meter, it may be worth considering rearranging so there's fewer meters, although that may not be the best for future use.
My house on 9 acres has 3 meters. One for the house, one for the well, and one for an outbuilding that was built before the house and used to be a woodshop. This arrangement would be handy if we subdivided and shared the well, or rented the shop to someone. Otoh, it's not very handy because the house is on a automatic generator and when utility power goes out, we have no water.