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PASSAIC COUNTY

Passaic 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

0.06 0.033 1.8 0% 18% 72% 9% 1%
0.95 0.45 2 0% 5% 12% 2% 81%*
0.62 0.13 4.7 <1% 27% 63% 8% 1%
0.55 0.17 3.2 0% 0% 0% 0% 100%
0.00002 0.000083 0.24 33% 48% 2% 17% 0%
0.69 0.0033 209 0% 0% 74% 26% 0%
0.00013 0.00043 0.3 24% 76% 0% 0% 0%
1.2 0.077 15.5 1% 8% 10% 3% 78%*
0.0000016 0.0002 0.008 100% 0% 0% 0% 0%
0.04 0.029 1.3 1% 38% 50% 7% 4%
31% 31% 8% 30% 0%
0.0000003 0.025 0.00001 33% 67% 0% 0% 0%
0.028 0.17 0.16 2% 98% 0% 0% 0%
0.0002 0.11 0.002 99% 1% 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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