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Advocate: A Louisiana iron plant pumped sulfur gas in the air for nearly six years before anybody caught it

For nearly six years, the Nucor Steel iron plant in St. James Parish released caustic sulfuric acid mist and highly flammable, rotten egg-smelling hydrogen sulfide into the air — and neither the plant nor regulators knew about it, documents show.

It wasn’t until mid-2019 when a test revealed the plant was among the 15 largest emitters of hydrogen sulfide in Louisiana — even though the plant didn’t have a permit to discharge the gas.