Earlier this year, Public Advocate Bill de Blasio blasted the hidden taxes contained in water and sewer rates. He was referring to the “rental payment” the Water Board makes to the City each year. The rental payment is supposed to cover the cost of water and sewer bonds issued by the City years ago. But the current payments greatly exceed those costs and are simply used to balance the City’s budget –truly a hidden tax. But will Bill de Blasio heed his own call for action if he becomes Mayor? Probably not.