RENSSELAER, Ind. (AP) — A northern Indiana city plans to test its drinking water for lead two years after another round of testing found elevated levels of the heavy metal in its water supply.

Rensselaer officials plan to test the city’s water at 40 different sites this summer.

That testing will come after testing by the state’s environmental agency in 2014 found lead levels at two homes that exceeded the federal action limit of 15 parts per billion.

City operations coordinator Jerry Lockridge tells the Journal & Courier that drinking water is safe in the city about 45 miles southeast of Gary.

Concerns about drinking water safety have been heightened nationwide because of Flint, Michigan’s water crisis sparked by high lead levels in its water supply.