Any farming practices that degrade water quality contribute to agricultural nonpoint source pollution. This is a problem in Kentucky's Bluegrass region where shallow soils and karst geology permit surface contaminants to reach groundwater quickly. Real and perceived threats to public health may make groundwater protection plans a reality if evidence for non-point source pollution in agricultural areas continues to grow.
Coyne, Mark S. and Howell, J. M., "Agricultural Impacts on Fecal Contamination of Shallow Groundwaters in the Bluegrass Region of Kentucky" (1994). Soil Science News and Views. 35.