SUSSEX
COUNTY
Sussex County Average 2011 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 |
<1% |
1% |
3% |
1% |
95%* |
Acrolein |
0.012 |
0.020 |
0.6 |
2% |
20% |
35% |
14% |
29%* |
Acrylonitrile |
0.00016 |
0.015 |
0.01 |
79% |
21% |
0% |
0% |
0% |
Arsenic compounds |
0.000063 |
0.00023 |
0.3 |
7% |
32% |
35% |
26% |
<1% |
Benzene |
0.48 |
0.13 |
3.7 |
<1% |
19% |
44% |
34% |
3% |
1,3-Butadiene |
0.033 |
0.033 |
1.0 |
1% |
16% |
50% |
30% |
3% |
Cadmium Compounds |
0.000027 |
0.00024 |
0.1 |
9% |
90% |
0% |
<1% |
<1% |
Carbon Tetrachloride |
0.55 |
0.17 |
3.2 |
0% |
0% |
0% |
0% |
100% |
Chromium (hexavalent form) |
0.00003 |
0.000083 |
0.4 |
58% |
32% |
1% |
9% |
<1% |
Diesel Particulate Matter |
0.36 |
0.0033 |
111 |
0% |
0% |
45% |
55% |
0% |
Ethylbenzene |
0.072 |
0.4 |
0.2 |
<1% |
7% |
38% |
33% |
22% |
Ethylene dibromide |
0.000015 |
0.0017 |
0.009 |
100% |
0% |
0% |
0% |
0% |
Ethylene oxide |
0.00028 |
0.011 |
0.02 |
79% |
21% |
0% |
0% |
0% |
Formaldehyde |
1.1 |
0.077 |
14 |
<1% |
2% |
2% |
2% |
94%* |
Hydrazine |
0.00000066 |
0.0002 |
0.003 |
11% |
0% |
0% |
0% |
89% |
Naphthalene |
0.021 |
0.029 |
0.7 |
3% |
33% |
52% |
12% |
0% |
Nickel compounds |
0.00033 |
0.0021 |
0.2 |
46% |
36% |
15% |
3% |
<1% |
Trichloroethylene |
0.0092 |
0.2 |
0.04 |
68% |
32% |
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. |
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