Warren 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
1
0.45
3
0.005%
2%
30%
4%
64%
Acrolein
0.05
0.020
2
0.04%
10%
75%
15%
0%
Arsenic Compounds
0.0005
0.00023
2
21%
7%
3%
2%
67%
Benzene
1
0.13
9
0.1%
16%
30%
8%
46%
1,3-Butadiene
0.07
0.033
2
0.08%
0.008%
33%
12%
55%
Cadmium Compounds
0.0004
0.00024
1.5
76%
7%
0%
0.05%
17%
Carbon Tetrachloride
0.6
0.067
9
0.0003%
0.05%
0%
0%
99.9%
Chloroform
0.08
0.043
1.7
0.003%
22%
0%
0%
78%
Chromium (hexavalent form)
0.0003
0.000083
3
50%
9%
2%
0.2%
39%
1,4-Dichlorobenzene
0.06
0.091
0.7
0.003%
29%
0%
0%
71%
1,3-Dichloropropene
0.04
0.25
0.1
0%
100%
0%
0%
0%
Diesel Particulate Matter
1
0.0033
364
0%
0%
40%
60%
*
Ethylbenzene
0.2
0.4
0.5
3%
5%
68%
24%
0%
Ethylene Oxide
0.06
0.011
5
85%
2%
0%
0%
13%
Formaldehyde
2
0.077
21
0.04%
2%
16%
5%
77%
Methyl Chloride
1
0.56
2
0.002%
0.2%
0%
0%
99.8%
Methyl tert-butyl ether
0.8
3.8
0.2
0.07%
17%
37%
46%
0%
Naphthalene
0.05
0.029
1.7
1%
30%
15%
2%
52%
PAH/POM
0.007
0.0075
1
1%
82%
12%
5%
0%
Perchloroethylene
0.09
0.17
0.5
0.1%
29%
0%
0%
71%
1,1,2-Trichloroethane
3.4E-7
0.063
5.4E-6
9%
91%
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.
