BOSTON (AP) — Water systems serving more than 264,000 Massachusetts residents have had testing samples exceed the federal lead standard at least once during the past three years.
While more than half of the waters systems are privately owned and serve a relatively tiny slice of the state’s population of 6.7 million, a handful of larger municipal systems have had testing samples above the U.S. Environmental Protection Agency standard since 2013.
They include Malden, Winthrop, Chelsea, Marlborough and New Bedford. The communities account for most of the affected population, nearly 252,000.
The 33 water systems were among nearly 1,400 systems serving 3.7 million Americans nationwide that have exceeded the federal lead standard at least once since Jan. 1, 2013, according to an Associated Press analysis of EPA data.