The slick, slimy substance that forced an evacuation of a northwest Indiana beach has been identified.
The Indiana Department of Environmental Management tested the substance that covered dozens of Porter Beach swimmers.
They determined it’s a chemical found in fertilizer, cleaners and is sometimes used as a food additive.
Officials believe it came off a ship.
No one has reported any health problems.
It has now dissipated and people are being allowed back in the water.