Hudson 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
4
0.45
9
3%
5%
67%
12%
13%
Acrolein
0.4
0.020
22
0.06%
30%
51%
19%
0%
Arsenic Compounds
0.0002
0.00023
0.9
4%
96%
0%
0%
0%
Benzene
4
0.13
29
0.2%
14%
61%
12%
13%
Bis(2-ethylhexyl)phthalate
2
0.42
4
0.5%
0.01%
0%
0%
99%
1,3-Butadiene
0.4
0.033
12
0.01%
10%
53%
11%
26%
Cadmium Compounds
0.0001
0.00024
0.5
9%
91%
0%
0.3%
0%
Carbon Tetrachloride
0.3
0.067
4
0.01%
1%
0%
0%
99%
Chloroform
0.2
0.043
4
0.2%
76%
0%
0%
24%
Chromium (hexavalent form)
0.0002
0.000083
2
9%
67%
23%
0.5%
0%
1,4-Dichlorobenzene
0.2
0.091
2
3%
97%
0%
0%
0%
1,3-Dichloropropene
0.4
0.25
1.4
0%
100%
0%
0%
0%
Diesel Particulate Matter
5
0.0033
1408
0%
0%
32%
68%
*
Ethylene Dibromide
0.04
0.0017
24
0.09%
0.03%
0%
0%
100%
Ethylene Dichloride
0.06
0.038
1.4
0.4%
0.4%
0%
0%
99%
Ethylene Oxide
0.02
0.011
1.9
1%
99%
0%
0%
0%
Formaldehyde
4
0.077
52
3%
3%
48%
20%
26%
Methyl Chloride
1
0.56
2
0.08%
1%
0%
0%
98%
Naphthalene
0.03
0.029
10
0.3%
75%
20%
5%
0%
Nickel Compounds
0.003
0.0064
0.5
0.3%
92%
5%
0.6%
0%
Perchloroethylene
0.6
0.17
4
0.5%
71%
0%
0%
29%
1,1,2,2-Tetrachloroethane
0.09
0.017
5
0.3%
0.4%
0%
0%
99%
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.
