This web application was created to aid in exploration and visualization of a potential relationship between water nitrate levels and cancer rates in Wisconsin. The data used in the analysis: 1) locations of cancer occurrences collected over a ten-year period 2) nitrate levels from test wells throughout each county in the state of Wisconsin. The application uses Inverse Distance Weighted (IDW) interpolation technique to produce a raster map of nitrate levels in WI. This technique is explicit in implying that close things are more related than distant things and allocates weights quantitatively based on distance. The second analysis layer in the application produces an Ordinary Least Squares linear regression to model a dependent variable (cancer rates) in terms of its relationship to the explanatory variable (nitrate levels).