Hunterdon County Average 2002 NATA Modeled Air Concentrations Compared to Health Benchmarks
Pollutant
Modeled
Air Concentration (ug/m3)
Health
Benchmark (ug/m3)
Risk
Ratio
%
Contribution from
Major Sources
Area
Sources
On-road
Mobile Sources
Nonroad
Mobile Sources
Background
Acetaldehyde
1
0.45
3
0.01%
2%
29%
6%
63%
Acrolein
0.05
0.020
2
0.06%
7%
73%
20%
0%
Arsenic Compounds
0.0004
0.00023
1.9
8%
6%
4%
3%
79%
Benzene
1
0.13
9
0.1%
16%
27%
10%
47%
1,3-Butadiene
0.07
0.033
2
0.2%
0.07%
25%
16%
59%
Cadmium Compounds
0.04
0.00024
0.7
48%
14%
0%
0.2%
38%
Carbon Tetrachloride
0.6
0.067
9
0.004%
0.04%
0%
0%
100%
Chloroform
0.07
0.043
1.7
0.06%
21%
0%
0%
79%
Chromium (hexavalent form)
0.0003
0.000083
3
57%
3%
2%
0.2%
38%
1,4-Dichlorobenzene
0.06
0.091
0.7
0.02%
26%
0%
0%
74%
1,3-Dichloropropene
0.03
0.25
0.1
0.00001%
100%
0%
0%
0%
Diesel Particulate Matter
1
0.0033
375
0%
0%
34%
66%
*
Ethylbenzene
0.2
0.4
0.5
1%
5%
63%
31%
0%
Ethylene Oxide
0.009
0.011
0.8
3%
5%
0%
0%
92%
Formaldehyde
2
0.077
21
0.05%
2%
16%
6%
76%
Methyl Chloride
1
0.56
2
0.002%
0.2%
0%
0%
99.8%
Methyl tert-butyl ether
1
3.8
0.3
0.06%
15%
31%
54%
0%
Naphthalene
0.06
0.029
2
2%
32%
12%
2%
52%
PAH/POM
0.01
0.0075
2
1%
91%
5%
3%
0%
Perchloroethylene
0.09
0.17
0.5
0.3%
29%
0%
0%
71%
1,1,2-Trichloroethane
3.0E-7
0.063
4.8E-6
11%
89%
0%
0%
0%
Chemicals with risk ratios greater than or equal to 1 are
in bold.
Risk Ratios in italics are based on noncarcinogenic effects.
The symbol ug/m3 is micrograms per cubic meter,
the amount (in micrograms) of a chemical in a cubic
meter of air. This is also known as a concentration.
* For diesel particulate matter, onroad and nonroad
concentrations include a model-estimated background
concentration.
