HUNTERDON
COUNTY
HUNTERDON County Average 2005 NATA Modeled Air Concentrations Compared to Health Benchmarks |
Pollutant |
Modeled
Air Concentration (ug/m3) |
Health
Benchmark (ug/m3) |
Risk
Ratio |
%
Contribution from |
Point Sources |
Nonpoint
Sources |
On-road
Mobile Sources |
Nonroad
Mobile Sources |
Background & Secondary |
Acetaldehyde |
1.5 |
0.45 |
3.4 |
0% |
2% |
1% |
1% |
96%* |
Acrolein |
0.028 |
0.020 |
1.4 |
<1% |
13% |
5% |
10% |
72%* |
Arsenic Compounds |
0.00042 |
0.00023 |
1.8 |
6% |
6% |
1% |
2% |
85% |
Benzene |
0.82 |
0.13 |
6.3 |
<1% |
18% |
8% |
7% |
67% |
1,3-Butadiene |
0.052 |
0.033 |
1.6 |
0% |
0% |
12% |
11% |
77% |
Cadmium Compounds |
0.00012 |
0.00024 |
0.5 |
31% |
18% |
0% |
<1% |
51% |
Carbon Tetrachloride |
0.61 |
0.067 |
9.1 |
0% |
<1% |
0% |
0% |
100% |
Chloroform |
0.075 |
0.043 |
1.7 |
<1% |
21% |
0% |
0% |
79% |
Chromium (hexavalent form) |
0.00012 |
0.000083 |
1.5 |
15% |
3% |
2% |
<1% |
80% |
Cobalt Compounds |
0.000034 |
0.00011 |
0.3 |
100% |
<1% |
0% |
0% |
0% |
1,4-Dichlorobenzene |
0.062 |
0.091 |
0.7 |
<1% |
26% |
0% |
0% |
74% |
1,3-Dichloropropene |
0.03 |
0.25 |
0.1 |
0% |
100% |
0% |
0% |
0% |
Diesel Particulate Matter |
0.24 |
0.0033 |
72 |
0% |
0% |
50% |
50% |
0% |
Ethylbenzene |
0.071 |
0.4 |
0.2 |
1% |
14% |
39% |
46% |
0% |
Ethylene Oxide |
0.0084 |
0.011 |
0.8 |
1% |
6% |
0% |
0% |
93% |
Formaldehyde |
1.6 |
0.077 |
21 |
<1% |
2% |
2% |
3% |
93%* |
Methyl Chloride |
1.2 |
0.56 |
2.1 |
0% |
<1% |
0% |
0% |
100% |
Naphthalene |
0.056 |
0.029 |
1.9 |
<1% |
33% |
11% |
4% |
52% |
Nickel Compounds |
0.0003 |
0.0021 |
0.1 |
52% |
13% |
2% |
<1% |
33% |
PAH/POM |
0.014 |
0.0072** |
2.2 |
<1% |
95% |
1% |
4% |
0% |
Perchloroethylene |
0.092 |
0.17 |
0.5 |
<1% |
29% |
0% |
0% |
71% |
1,1,2-Trichloroethane |
3.1E-7 |
0.063 |
5.0E-6 |
14% |
86% |
0% |
0% |
0% |
|
Chemicals with risk ratios greater than or equal to 1 are
in bold.
Risk Ratios based on noncarcinogenic effects are in italics.
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. *Acetaldehyde, acrolein and formaldehyde concentration estimates include secondary formation, which is the process by which chemicals in the air are transformed into other chemicals.
**PAH/POM is "polycyclic aromatic hydrocarbons/polycyclic organic matter." These define a broad class of compounds. The chemicals making up this class were broken up into 8 groups based on toxicity, and each group was assigned a cancer-weighted toxicity estimate. 0.0072 ug/m3 is the health benchmark average across the 8 groups. |
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