Passaic County Average 1999 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
1%
5%
59%
11%
24%
Acrolein
0.2
0.020
10
0.03%
29%
54%
17%
0%
Arsenic Compounds
0.0001
0.00023
0.4
4%
96%
0%
0%
0%
Benzene
2
0.13
15
0.08%
6%
55%
16%
23%
Bis(2-ethylhexyl)phthalate
2
0.42
4
0.07%
0.001%
0%
0%
100%
1,3-Butadiene
0.2
0.033
6
0.003%
3%
46%
16%
35%
Cadmium Compounds
0.00007
0.00024
0.3
6%
94%
0%
0.4%
0%
Carbon Tetrachloride
0.3
0.067
4
0.003%
0.6%
0%
0%
99%
Chloroform
0.01
0.043
3
0.6%
66%
0%
0%
33%
Chromium (hexavalent form)
0.0001
0.000083
1.5
4%
81%
15%
0.6%
0%
1,4-Dichlorobenzene
0.1
0.091
1.4
0.9%
99%
0%
0%
0%
1,3-Dichloropropene
0.2
0.25
1
0%
100%
0%
0%
0%
Diesel Particulate Matter
2
0.0033
583
0%
0%
44%
56%
*
Ethylene Dibromide
0.03
0.0017
19
0.02%
0.03%
0%
0%
100%
Ethylene Dichloride
0.05
0.038
1.2
0.3%
0.04%
0%
0%
99%
Ethylene Oxide
0.004
0.011
0.4
0.7%
99%
0%
0%
0%
Formaldehyde
2
0.077
29
0.7%
3%
41%
15%
40%
Methyl Chloride
1
0.56
2
0.1%
1%
0%
0%
99%
Naphthalene
0.01
0.029
4
0.2%
74%
21%
5%
0%
Nickel Compounds
0.002
0.0064
0.3
1%
95%
4%
0.3%
0%
Perchloroethylene
0.4
0.17
2
0.08%
62%
0%
0%
37%
1,1,2,2-Tetrachloroethane
0.07
0.017
4
0.03%
0.3%
0%
0%
100%
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.
