Town of Mamaroneck resident and business water bills are getting higher… by about 13%, effective immediately. Director of Westchester Water Works Antony Conetta told the Mamaroneck Town Board Wednesday that households that use the most water will be charged a surcharge of 2 % on top of the 13% rate increase. Conetta also recommended that households use water from 8 am to 11 pm that way water tanks can be refilled on the “off-hours”. The Town Board approved the increase.