It is well-documented that certain pollutants are associated with specific land use types.
Blue areas indicate land uses for which there was insufficient data to conduct the analysis.
Green areas indicate land uses that are not sources for phosphorus pollution. This includes undeveloped and natural areas. The red to deep red land uses offer the greatest risk of high phosphorus concentrations in runoff from the area. Phosphorus The map at left shows wetlands and the relative risk to each for receiving phosphorus pollution. This analysis is based upon the method and results described above.