Green areas indicate wetlands that have no risk of pollution from surrounding land uses. These are wetlands that are surrounded by natural areas, preserves, or vacant land. The scale of risk corresponds to a gradient of color from white to deep red. Wetlands that are lighter in color have lower risk for receiving pathogenic organism pollutants. Wetlands that are red to deep red have the highest risk.
Blue areas indicate land uses for which there are insufficient data to analyze.
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