BERGEN 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
2.2
0.45
4.9
<1%
5%
9%
4%
82%*
Acrolein
0.087
0.020
4.3
<1%
23%
15%
10%
52%*
Arsenic Compounds
0.00054
0.00023
2.4
2%
19%
8%
6%
65%
Benzene
1.7
0.13
13
<1%
13%
38%
17%
32%
1,3-Butadiene
0.12
0.033
3.8
0%
<1%
0%
0%
100%
Cadmium Compounds
0.00013
0.00024
0.6
8%
56%
0%
<1%
36%
Carbon Tetrachloride
0.61
0.067
9.1
0%
<1%
0%
0%
100%
Chloroform
0.20
0.043
4.6
<1%
70%
0%
0%
30%
Chromium (hexavalent form)
0.00027
0.000083
3.2
43%
14%
6%
1%
36%
Cobalt Compounds
0.00028
0.00011
2.6
95%
5%
0%
0%
0%
1,4-Dichlorobenzene
0.14
0.091
1.6
<1%
68%
0%
0%
32%
1,3-Dichloropropene
0.20
0.25
0.8
0%
100%
0%
0%
0%
Diesel Particulate Matter
1.2
0.0033
379
0%
0%
47%
53%
0%
Ethylbenzene
0.51
0.4
1.3
1%
23%
49%
27%
0%
Ethylene Oxide
0.0071
0.011
1
9%
23%
0%
0%
68%
Formaldehyde
2.4
0.077
32
<1%
3%
12%
8%
77%*
Methyl Chloride
1.2
0.56
2.2
<1%
1%
0%
0%
99%
Naphthalene
0.19
0.029
6.7
<1%
50%
29%
4%
17%
Nickel Compounds
0.0013
0.0021
0.6
30%
57%
3%
2%
8%
PAH/POM
0.016
0.0072**
1.9
<1%
77%
10%
13%
0%
Perchloroethylene
0.32
0.17
1.9
<1%
79%
0%
0%
21%
1,1,2-Trichloroethane
2.8E-6
0.063
4.5E-5
52%
48%
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.
