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ATLANTIC COUNTY

Atlantic County Average 2014 NATA Modeled Air Concentrations Compared to Health Benchmarks
Pollutant Modeled Air Concentration (ug/m3) Health Benchmark (ug/m3) Risk Ratio % Contribution by Source Category
Point Sources Nonpoint Sources Onroad Mobile Nonroad Mobile

Background& Secondary

0.02 0.033 0.6 0% 17% 29% 43% 11%
0.83 0.45 1.8 0% 2% 2% 3% 93%*
0.36 0.13 2.7 0% 24% 30% 41% 5%
0.55 0.17 3.2 0% 0% 0% 0% 100%
0.000022 0.000083 0.2 41% 12% 1% 46% 0%
0.3 0.0033 90 0% 0% 26% 74% 0%
0.00013 0.00043 0.3 1% 99% 0% 0% 0%
1.0 0.077 12 0% 2% 1% 4% 93%*
0.00000007 0.0002 0.0003 100% 0% 0% 0% 0%
0.023 0.029 0.79 0% 23% 20% 33% 24%
11% 3% 4% 82% 0%
0.0000003 0.025 0.00001 93% 7% 0% 0% 0%
0.02 0.17 0.1 2% 98% 0% 0% 0%
0.0013 0.11 0.1 100% 0% 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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