WARREN 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
1.5
0.45
3.3
0%
2%
2%
1%
95%*
Acrolein
0.027
0.020
1.4
<1%
16%
10%
8%
66%*
Arsenic Compounds
0.0005
0.00023
2.2
20%
7%
2%
1%
70%
Benzene
0.8
0.13
6.1
<1%
12%
13%
7%
68%
1,3-Butadiene
0.05
0.033
1.6
0%
0%
16%
8%
76%
Cadmium Compounds
0.00031
0.00024
1.3
72%
9%
0%
<1%
19%
Carbon Tetrachloride
0.61
0.067
9.1
0%
<1%
0%
0%
100%
Chloroform
0.076
0.043
1.8
1%
21%
0%
0%
78%
Chromium (hexavalent form)
0.00014
0.000083
1.7
26%
4%
2%
<1%
68%
Cobalt Compounds
0.00046
0.00011
4.2
100%
<1%
0%
0%
0%
1,4-Dichlorobenzene
0.065
0.091
0.7
0%
29%
0%
0%
71%
1,3-Dichloropropene
0.036
0.25
0.1
0%
100%
0%
0%
0%
Diesel Particulate Matter
0.37
0.0033
112
0%
0%
72%
28%
0%
Ethylbenzene
0.089
0.4
0.2
2%
11%
55%
32%
0%
Ethylene Oxide
0.0096
0.011
0.9
9%
9%
0%
0%
82%
Formaldehyde
1.6
0.077
21
<1%
2%
4%
2%
92%*
Methyl Chloride
1.2
0.56
2.1
0%
<1%
0%
0%
100%
Naphthalene
0.053
0.029
1.8
<1%
29%
19%
3%
49%
Nickel Compounds
0.00067
0.0021
0.3
78%
6%
1%
<1%
15%
PAH/POM
0.0069
0.0072**
1
<1%
74%
11%
15%
0%
Perchloroethylene
0.092
0.17
0.5
<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 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.
