The state has responded to requests and added two weeks to the public comment period on a plan to cut pollution running down the Mississippi River to the Gulf of Mexico.
The Des Moines Register says Friday was the scheduled end of the 45-day comment period. Comments now will be taken until Jan 18.
Under the plan that was released in November, wastewater treatment and industrial plants would be asked to make costly upgrades to cut pollution while farmers would do so voluntarily.
It took two years of study and private meetings to formulate the plan. It comes in response to the U.S. Environmental Protection Agency's order in 2008 for 12 states along the Mississippi River to develop strategies to prevent nitrates and phosphorous from reaching the gulf.