Des Moines Water Works CEO and general manager Bill Stowe stands in the Nitrate Removal Facility at the Water Works treatment plant, Thursday, May 16, 2013, in Des Moines, Iowa. The rain that soaked ... more 
Des Moines Water Works CEO and general manager Bill Stowe stands in the Nitrate Removal Facility at the Water Works treatment plant, Thursday, May 16, 2013, in Des Moines, Iowa. The rain that soaked much of the upper Midwest in April helped replenish the soil parched by last year’s severe drought but rain fell so rapidly that it also washed tons of manure and fertilizer sitting on farm fields into rivers. That has boosted the nitrate level to record highs creating problems for cities like Des Moines and Cedar Rapids which draw their drinking water from the rivers. (AP Photo/Charlie Neibergall) less 
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Associated Press | Photo By Charlie Neibergall
Wed, Jun 5, 2013 3:04 AM EDT