While nitrogen fertilizers and other nutrient sources (e.g., manure, bio-solids, and legume credits) are valued for their ability to increase crop yields, a portion of nitrogen applied through these methods leaches to groundwater as nitrate.

Concern has recently emerged about a group of trace organic compounds identified in the aquatic environment which might affect reproduction and development of wildlife species and humans due to endocrine disruption (Colborn et al., 1996; Roefer et al., 2000).

Private well testing is an evidence-based strategy to reduce risks from exposure to harmful contaminants. It is a primary way contaminants can be detected, potential for health risks can be estimated, and actions taken.

Project canceled (WDNR communication 2010).

Increased impervious areas resulting from urbanization cause an increase in stormwater runoff and a decrease in infiltration to the groundwater table.

In order for communities to plan for the future, it is essential that both the quantity and quality of groundwater be protected. Wisconsin law requires that by January 1, 2010