The Environmental Working Group (EWG) released the latest update of its Tap Water Database, detailing contaminants in nearly 50,000 water utilities in every state. The free, user-friendly database is the most comprehensive consumer resource available on drinking water quality in the U.S.
EWG’s database, first published in 2005, aggregates data from utilities’ reports of water quality tests into one platform that is easy to search by location, community name or contaminant. The latest release of the database includes data for tests conducted in 2016 and 2017. For this update, EWG analyzed 32 million test results for 517 different contaminants or contaminant groups.