An ongoing investigation into Sioux City, Iowa’s wastewater treatment plant has led FBI agents to obtain a search warrant and seize computer data at the city’s information technology department.The plant’s management has been under investigation since early 2015, when it was discovered that two supervisors had altered treatment chemicals, causing effluent into the Missouri River to contain high levels of E. coli.Since the state Department of Natural Resources caps its penalties at $10,000, the Iowa Environmental Protection Commission asked Iowa’s attorney general to pursue a federal case.It hasn’t yet been reported what the FBI agents were looking for or what
