The Iowa Environmental Council and other environmental groups are suing the Environmental Protection Agency. They hope that legal action will prompt the EPA to put limits on the levels of nitrogen and phosphorous pollution in Iowa’s waterways.

This pollution hurts Iowa’s water quality, and also contributes to the Gulf of Mexico’s dead zone.

The lawsuit challenges the EPA’s denial of a 2008 petition requesting limits on nitrogen and phosphorous, as well as cleanup plans for the pollution.

Read the full press release from the Iowa Environmental Council here.