Des Moines Water Works CEO Bill Stowe testifies during an Iowa Department of Natural Resources hearing on proposed new clean water rules, Friday, May 9, 2014, in Des Moines, Iowa. The Iowa DNR is ... more 
Des Moines Water Works CEO Bill Stowe testifies during an Iowa Department of Natural Resources hearing on proposed new clean water rules, Friday, May 9, 2014, in Des Moines, Iowa. The Iowa DNR is facing criticism for proposing new livestock farm enforcement rules environmental groups and others say are not tough enough to clean up the state’s rivers and lakes. (AP Photo/Charlie Neibergall) less 
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Associated Press | Photo By Charlie Neibergall
Fri, May 9, 2014 2:36 PM EDT