2018

High Country News
2017

Better Government Association
2014
InsideClimate News, Center for Public Integrity, The Weather Channel
2012
An eight-person team collaborated on the winning entry
2011
Center for Public Integrity
2007
Milwaukee Journal Sentinel
2006
The San Francisco Chronicle
2005
Cleveland Plain Dealer
2004
The Dallas Morning News
2001
Austin American-Statesman and Cox Newspapers
1999
Louisville Courier-Journal