When experts said last year that New York City’s method of testing water in public schools for lead could hide dangerously high levels of the metal, officials at first dismissed the concerns. They insisted that the city’s practice of running the water for two hours the night before taking samples would not distort results.
Still, the city changed its protocol, and the results from a new round of tests indicate that the experts were right.
So far, the latest tests have found nine times as many water outlets — kitchen sinks, water fountains, classroom faucets or other sources — with lead levels above the Environmental Protection Agency’s “action level” of 15 parts per billion as last year’s tests found, according to a report released by the state health department last week.
And in some schools where the earlier tests detected problems, the lead levels identified by the new tests were much worse.