Analysis Products on Water Quality

All of the maps, figures and tables for NRI's water quality are taken from publications. Many of the publications discuss the use of fertilizer, pesticide, or manure. Several of the maps are taken from 'A Geography of Hope.' In general - When you click on an individual map, chart, or table on the subject index pages, you will get -- An "Explanation of Analysis," information that is essential to proper interpretation of the map. If you use our analysis products, please be aware of our disclaimer. A link to a downloadable Postscript file you can use to print a map. A link to the related state summary table. A link to the data file used to make the map. Data files are in pipe-delimited ASCII text format. The data file can be used with our GIS coverages to recreate the maps found on this site. Summary tables and data files are not available for all maps.