Passaic 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
2
0.45
5
0.03%
5%
43%
9%
43%
Acrolein
0.1
0.020
6
0.1%
15%
65%
20%
0%
Arsenic Compounds
0.0005
0.00023
2
1%
15%
9%
7%
68%
Benzene
2
0.13
15
0.2%
10%
46%
16%
28%
1,3-Butadiene
0.1
0.033
4
0.4%
0.02%
47%
24%
29%
Cadmium Compounds
0.0001
0.00024
0.5
5%
51%
0%
0.5%
44%
Carbon Tetrachloride
0.6
0.067
9
0.0002%
0.2%
0%
0%
99.8%
Chloroform
0.1
0.043
3
0.1%
59%
0%
0%
41%
Chromium (hexavalent form)
0.0002
0.000083
2
23%
20%
9%
1%
47%
1,4-Dichlorobenzene
0.2
0.091
1.8
0.1%
72%
0%
0%
28%
1,3-Dichloropropene
0.2
0.25
0.9
0.00002%
100%
0%
0%
0%
Diesel Particulate Matter
1
0.0033
433
0%
0%
31%
69%
*
Ethylbenzene
0.6
0.4
1.4
2%
13%
59%
26%
0%
Ethylene Oxide
0.01
0.011
1
3%
28%
0%
0%
69%
Formaldehyde
2
0.077
29
0.2%
3%
28%
13%
56%
Methyl Chloride
1
0.56
2
0.01%
1%
0%
0%
99%
Methyl tert-butyl ether
3
3.8
0.8
0.2%
13%
37%
50%
0%
Naphthalene
0.1
0.029
5
2%
62%
12%
3%
21%
PAH/POM
0.01
0.0075
1.9
2%
75%
14%
9%
0%
Perchloroethylene
0.3
0.17
1.7
0.3%
78%
0%
0%
22%
1,1,2-Trichloroethane
2.0E-6
0.063
3.0E-5
34%
66%
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.
