Hey, it IS Massachusetts.
M.G.L., C. 186, Section 22 (f):”A landlord may not charge the tenant separately, nor allow tenant to be charged separately, for submetered water usage unless the tenant has signed a written rental agreement that clearly and conspicuously provides for such separate charge and that fully discloses in plain language the details of the water submetering and billing arrangement between the landlord and the tenant. Each bill for submetered water usage shall clearly set forth all charges and all other relevant information, including, but not limited to, the current and immediately preceding submeter readings and the date of each such reading, the amount of water consumed since the last reading, the charge per unit of water, the total charge and the payment due date.”
The landlord was engaging in unfair and deceptive business practices.