Professional Paper 1894–C
See chapter C, appendix 1 for descriptions of and citations for all data sources.
Figure 1.1. Interactive, searchable map showing SPAtially Referenced Regressions On Watershed (SPARROW) model results for nitrogen, phosphorous, and sediment in the conterminous United States. Map derived from figures 3, 4, and 8.
Figure 1.2. Interactive, searchable map showing summary of decadal network Cycle 3 (2012–22) groundwater-quality results in the conterminous United States.
Figure 1.3. Interactive, searchable map showing summary of groundwater-quality results of principal aquifer network in Cycle 3 (2012–22) in the conterminous United States. Maps of arsenic and manganese are also presented in figure 16.
Figure 1.4. Interactive, searchable map showing selected groundwater-quality model results in the conterminous United States.
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