Environmental penalties have been levied against Sioux City, Iowa for dumping "improperly treated sewage" into the Missouri River that contained very high levels of E.Coli bacteria. The penalties were brought forward by the Iowa Department of Natural Resources (DNR) who wants the Attorney General to take civil action against the city.
This bacteria is known to have harmful effects on humans and the Missouri River is a place where people come into prolonged direct contact with this water. Supervisors have in the past admitted to increasing chlorine levels during the days when these samples were taken but turned them down after. It is believed that cities water was not harmed by this:
In Council Bluffs, IA, which is about 90 miles downstream, officials said they are confident the improperly treated discharges did not harm the quality of the city's water, a portion of which comes from the river, according to the Sioux City Journal.