When pollution gets bad enough in the rivers supplying Iowa’s largest city with drinking water, it costs Des Moines around $16,000 a day to run a special system to filter out dangerous nitrates. It’s ...

Pollution levels in Iowa's water have been abnormally high this winter. That's forcing the state's largest city, Des Moines, to run an expensive nitrate removal system that they usually only use in ...

Despite the control measures and regulations in place, industrial water pollution is still a problem in the United States. The Environmental Protection Agency (EPA) has found that thousands of ...