Starting next week, the Madison Water Utility will be attempting to maintain a level of 0.3 milligrams per liter of chlorine in all the water leaving all of the city’s 21 active wells.
….Dr. Greg Harrington, a professor of civil and environmental engineering at the University of Wisconsin-Madison who helped develop the new policy, said the change was being made to provide a margin of safety, to facilitate system operation and to prepare for the requirement of a federal groundwater rule that utilities will have to comply with starting in 2009.