Effects of Agriculture and Urbanization on Quality of Shallow Ground Water in the Arid to Semiarid Western United States, 1993

Scientific Investigations Report 2007–5179

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5179

Figure - refer to figure caption for alternative text description

Figure 11. Nitrate concentration in water samples collected from all agricultural wells, agricultural wells in the San Joaquin-Tulare Basins (SANJ) study unit, and agricultural wells in the Central Arizona Basins (CAZB), Nevada Basin and Range (NVBR), Rio Grande Valley (RIOG), and Sacramento River Basin (SACR), 1993–2004.

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