HUDSON 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
2.6
0.45
5.8
<1%
8%
9%
7%
76%*
Acrolein
0.13
0.020
6.7
<1%
30%
12%
12%
46%*
Arsenic Compounds
0.00076
0.00023
3.3
5%
28%
7%
14%
46%
Benzene
2.3
0.13
18
<1%
24%
33%
19%
24%
1,3-Butadiene
0.13
0.033
4
<1%
<1%
44%
26%
30%
Cadmium Compounds
0.00023
0.00024
0.9
10%
66%
0%
3%
21%
Carbon Tetrachloride
0.61
0.067
9.2
0%
1%
0%
0%
99%
Chloroform
0.21
0.043
4.8
1%
71%
0%
0%
28%
Chromium (hexavalent form)
0.00035
0.000083
4.2
37%
28%
6%
1%
28%
Cobalt Compounds
0.00014
0.00011
1.3
75%
25%
0%
0%
0%
1,4-Dichlorobenzene
0.21
0.091
2.4
1%
78%
0%
0%
21%
1,3-Dichloropropene
0.36
0.25
1.4
0%
100%
0%
0%
0%
Diesel Particulate Matter
3
0.0033
925
0%
0%
32%
68%
0%
Ethylbenzene
1
0.4
2.5
1%
50%
30%
19%
0%
Ethylene Oxide
0.02
0.011
1.9
47%
15%
0%
0%
38%
Formaldehyde
3.1
0.077
40
<1%
4%
12%
14%
70%*
Methyl Chloride
1.2
0.56
2.2
<1%
1%
0%
0%
99%
Naphthalene
0.32
0.029
11
<1%
65%
21%
4%
10%
Nickel Compounds
0.0039
0.0021
1.8
22%
54%
1%
20%
3%
PAH/POM
0.019
0.0072**
2.2
1%
67%
10%
22%
0%
Perchloroethylene
0.51
0.17
3
<1%
87%
0%
0%
13%
1,1,2-Trichloroethane
0.000093
0.063
1.5E-4
66%
34%
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.
