UNL Conservation and Survey Division. 1999. Pesticides and Groundwater: An Applicator's Map and Guide to Prevent Groundwater Contamination. These “county guides” are free publications available for ALL counties from the Nebraska Department of Agriculture, in either paper or PDF format. Contact the NDA pesticide program at (402) 471-2351 or the ‘contact us’ link below to request your counties of interest.
Example county guides: