There is no better way to start the New Year than by reviewing the water and sewer rates from this year. The 2018 Advisory Board Water and Sewer Retail Rate Survey is here! The 2018 document highlights a 2.8% increase from the prior year for the average annual cost of water and sewer services for a household in the MWRA service area at the industry standard usage of 120 HCF (90,000 gallons); the average cost in 2017 being $1,602.14.