Neurological Risk by Census Tract Polygons, California, 2005, NATA

Data containing ambient concentration, exposures concentrations and risk for each pollutant. Results are presented as noncancer hazard index (HI) representing the sum of hazard quotients (HQ) for substances that affect the same target organ (neurological). Results are presented for each source category (point [includes some areas sources], non-point, on-road mobile, non-road mobile, background, and secondary formation), total risk representing the sum of all substances that affect the same target organ (neurological) and individual pollutant contributions to total HI, e.g., 1.63E+00 represents a HI of 1.63; 1.17E+01 represents a HI of 11.7.