An AP analysis of EPA data found that nearly 1,400 water systems serving 3.6 million Americans exceeded the federal lead standard at least once between Jan. 1, 2013, and Sept. 30, 2015.
An AP analysis of EPA data found that nearly 1,400 water systems serving 3.6 million Americans exceeded the federal lead standard at least once between Jan. 1, 2013, and Sept. 30, 2015.