Water In Des Moines Water Polluted
City Quadruples Chlorine To Treat Water
Tests by the Iowa Department of Natural Resources have found elevated ammonia levels in the state's rivers and streams.
Officials say the record levels were caused by fertilizer that was spread on frozen ground. The heavy ice cover acted like a lid, trapping ammonia that otherwise would have made its way into the atmosphere.
Officials at the Des Moines Water Works say the problem prompted them to draw water from an alternative source. They say they've also quadrupled the amount of chlorine used to treat water taken from nearby rivers.