Elevated lead levels have been found in the drinking water in Newark, N.J., prompting legal action from an environmental group that alleges the city and state aren’t doing enough to protect residents.

In Newark, at least 10% of nearly 300 water samples tested last year showed lead contamination in excess of 26.7 parts per billion, above the federal action level of 15 parts per billion, according to state records. Lead has also been found in drinking water tested this year, with several samples showing high levels of contamination.

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