New
Jersey Statewide Average 2005 NATA Modeled Air Concentrations
Compared to Health Benchmarks
Pollutant
Modeled
Air Concentration (ug/m3)
Health
Benchmark (ug/m3)
Risk
Ratio
%
Contribution by Source Category
Point Sources
Nonpoint Sources
Onroad
Mobile
Nonroad
Mobile
Background& Secondary
Acetaldehyde
1.9
0.45
4.3
<1%
4%
6%
3%
87%*
Acrolein
0.062
0.020
3.1
<1%
22%
14%
9%
55%*
Arsenic Compounds
0.0005
0.00023
2.3
3%
13%
5%
5%
74%
Benzene
1.3
0.13
10
<1%
13%
30%
13%
44%
1,3-Butadiene
0.095
0.033
2.9
<1%
<1%
40%
17%
43%
Cadmium Compounds
0.00011
0.00024
0.5
12%
44%
0%
1%
43%
Carbon Tetrachloride
0.61
0.067
9.1
0%
<1%
0%
0%
100%
Chloroform
0.13
0.043
3.1
<1%
54%
0%
0%
46%
Chromium (hexavalent form)
0.00024
0.000083
2.9
29%
10%
4%
1%
56%
Cobalt Compounds
0.000093
0.00011
0.8
93%
7%
0%
0%
0%
1,4-Dichlorobenzene
0.12
0.091
1.3
<1%
58%
0%
0%
42%
1,3-Dichloropropene
0.14
0.25
0.5
0%
100%
0%
0%
0%
Diesel Particulate Matter
1.1
0.0033
327
0%
0%
47%
53%
0%
Ethylbenzene
0.34
0.40
0.9
1%
30%
45%
24%
0%
Ethylene Oxide
0.011
0.011
1
12%
18%
0%
0%
70%
Formaldehyde
2.2
0.077
28
<1%
3%
9%
6%
82%*
Methyl Chloride
1.2
0.56
2.2
<1%
1%
0%
0%
99%
Naphthalene
0.13
0.029
4.6
1%
48%
26%
4%
21%
Nickel Compounds
0.0012
0.029
0.6
36%
37%
2%
10%
15%
PAH/POM
0.012
0.0072**
1.6
1%
79%
8%
12%
0%
Perchloroethylene
0.25
0.17
1.4
<1%
61%
0%
0%
39%
1,1,2-Trichloroethane
0.0066
0.063
0.1
<1%
100%
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.
