state-of-the-art ozone disinfection plant and covered storage tanks throughout the district guarantee some of the best drinking water in the country for generations to come. But these improvements have come at a price." Annual test reports Water test results must be made public annually. The MWRA's drinking water test results for 2014 were published in June 2015. Results from previous years are also available online. Fluoridation The MWRA has fluoridated its drinking water since the 1980s, maintaining a target fluoride level of 0.7 parts per million. See also Boston Water and Sewer Commission Nut Island effect References External links MWRA homepage . (Various documents). The history of Massachusetts water system components MWRA Enabling Act. MGL Ch.372 ACTS, 1984 360 CMR Sewer Use 2003 Community Assessments (Rates) MWRA Advisory Board MWRA Customer Community Websites Water Resources Authority Water supply and sanitation in Massachusetts Public utilities of the United States Water management authorities in the United States Water companies of the United States Dedham, Massachusetts