DES MOINES, Iowa (KTIV) -
Iowa Governor Terry Branstad has released his administration's long-awaited strategy for reducing the amount of harmful nutrients in the state's waterways on Monday.
Under the proposals, Iowa's 130 largest wastewater and industrial plants would be required to make costly upgrades to cut discharges of phosphorous and nitrogen.
Farmers would voluntarily reduce runoff of fertilizers and manure.
Four years ago, the EPA ordered 12 states along the Mississippi River to develop strategies to prevent nitrates and phosphorous from reaching the Gulf of Mexico, where they harm marine and plant life.
Iowa is one of the leading contributors of runoff.