South Sioux City sewer gas seepage

The exterior of Big Ox Energy in Dakota City, Nebraska. South Sioux City homeowners blame their displacement on Big Ox Energy, which began treating the city's wastewater in the fall.

SOUTH SIOUX CITY — Federal officials say a company whose northeast Nebraska renewable energy plant was the main contributor to toxic odors that displaced 26 households at their height has agreed to a $50,000 settlement.

The U.S. Environmental Protection Agency said in a press release Tuesday that Big Ox Energy also agreed to work with the EPA and Nebraska Department of Environmental Quality to prevent chemical releases like those that occurred at the company’s South Sioux City plant last year.

EPA investigators found in January that Big Ox discharges at its South Sioux City plant contributed to the creation of toxic gases that sickened a worker. 

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