Predicted nitrate and arsenic concentrations in basin-fill aquifers of the Southwest Principal Aquifers study area
This product "Predicted nitrate and arsenic concentrations in basin-fill aquifers of the 
Southwest Principal Aquifers study area" is a 1:250,000-scale vector dataset and was 
developed as part of a regional Southwest Principal Aquifers (SWPA) study. The study 
examined the vulnerability of basin-fill aquifers in the …