More than 95 percent of Wisconsin's communities rely on groundwater as their drinking-water source. In some areas of the state, 40 percent of that water shows detectable levels of contaminants such as pesticides. To ensure residents have access to safe drinking water in the future, the state Department of Natural Resources and the University of Wisconsin System launched a new Web site to provide local-government planners and private developers with accessible and usable groundwater data. The site, Protecting Wisconsin's Groundwater Through Comprehensive Planning, offers data and policy information from 16 federal, state and local agencies, covering 72 counties on sources of drinking water, groundwater-protection policies, money spent on cleanup, susceptibility of groundwater to pollutants and groundwater quality.