POLLUTION LOCATOR|Hazardous Air Pollutants | Source Categories Contributing to Chemical-specific Risks

County:      MONTGOMERY


HAP Sort by Added Cancer Risk (per 1,000,000) Sort by Noncancer Hazard Index Percent Emitted from Point Sources Percent Emitted from Area Sources Percent Emitted from Mobile Sources Percent from Background Levels

DIESEL EMISSIONS 720 0.48 0% 0% 63% 37%
BENZENE 46 0.027 0.0065% 2.8% 68% 30%
CARBON TETRACHLORIDE 37 0.022 0.00023% 0.058% 0% 100%
1,3-BUTADIENE 14 0.0040 0% 3.3% 97% 0%
POLYCYCLIC ORGANIC MATTER (POM) 12 -- 0.0012% 99% 1.4% 0%
FORMALDEHYDE 8.8 0.49 0.0044% 5.6% 78% 17%
CHROMIUM 3.5 0.0029 6.1% 38% 55% 0%
ACETALDEHYDE 2.3 0.094 0.0045% 7.6% 92% 0%
TETRACHLOROETHYLENE 1.8 0.0077 4.5% 51% 0% 44%
1,3-DICHLOROPROPENE (MIXED ISOMERS) 1.8 0.0055 0% 100% 0% 0%
1,2-DICHLOROETHANE 1.3 0.00015 0.0054% 0.039% 0% 100%
ETHYLENE OXIDE 0.57 0.00022 0% 100% 0% 0%
1,2-DIBROMOETHANE 0.55 0.0096 0% 0.0017% 0% 100%
CHLOROFORM 0.44 0.00028 0% 4.3% 0% 96%
DICHLOROMETHANE 0.39 0.00096 0.0055% 63% 0% 37%
TRICHLOROETHYLENE 0.26 0.00022 0% 40% 0% 60%
ARSENIC 0.26 0.0026 33% 64% 2.7% 0%
POLYCHLORINATED BIPHENYLS 0.22 0.00032 0% 0% 0% 100%
NICKEL 0.21 0.016 9.1% 75% 16% 0%
ACRYLONITRILE 0.076 0.00013 0% 100% 0% 0%
CADMIUM 0.068 0.0019 13% 86% 0.31% 0%
LEAD 0.062 0.034 2.3% 17% 81% 0%
HEXACHLOROBENZENE 0.047 0.000031 0% 0.027% 0% 100%
BERYLLIUM 0.038 0.016 8.5% 91% 0.052% 0%
VINYL CHLORIDE 0.012 0.000031 0% 100% 0% 0%
1,1,2,2-TETRACHLOROETHANE 0.0030 0.000000021 0% 100% 0% 0%
QUINOLINE 0 -- 0% 100% 0% 0%
1,2-DICHLOROPROPANE 0 0.0000030 0% 100% 0% 0%
HYDRAZINE 0 0.000000069 0% 100% 0% 0%
MERCURY -- 0.0038 9.8% 81% 8.8% 0%
STYRENE -- 0.000044 0.0016% 2.7% 97% 0%
ETHYLBENZENE -- 0.00025 0.18% 14% 85% 0%
ACROLEIN -- 2.1 0.015% 15% 85% 0%
N-HEXANE -- 0.000094 0.0049% 51% 49% 0%
TOLUENE -- 0.010 0.54% 19% 80% 0%
METHYL TERT-BUTYL ETHER -- 0.00018 0% 2.7% 97% 0%
MANGANESE -- 0.011 1.4% 92% 6.1% 0%
XYLENE (MIXED ISOMERS) -- 0.0028 0.16% 15% 77% 8.4%

See the 1996 emissions data EPA used to estimate exposures from these source categories