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The South Coast AQMD includes all of Orange County; and the non-desert regions of Los Angeles County, San Bernardino County, and Riverside County including the Coachella Valley. The South Coast Air Basin area encompassed by the South Coast AQMD amounts to about 10,750 square miles (27,850 square kilometres) and is the second most populated area ...
Nitrogen dioxide poisoning is the illness resulting from the toxic effect of nitrogen dioxide (NO 2). It usually occurs after the inhalation of the gas beyond the threshold limit value. [1] Nitrogen dioxide is reddish-brown with a very harsh smell at high concentrations, at lower concentrations it is colorless but may still have a harsh odour.
One of several nitrogen oxides, nitrogen dioxide is a reddish-brown gas. It is a paramagnetic , bent molecule with C 2v point group symmetry . Industrially, NO 2 is an intermediate in the synthesis of nitric acid , millions of tons of which are produced each year, primarily for the production of fertilizers .
Nitrogen dioxide (NO 2) Primary and Secondary 0.053 ppm (100 μg/m 3) annual Annual mean 40 CFR 50.11: Primary 0.100 ppm (188 μg/m 3) 1-hour 98th percentile of 1-hour daily maximum, averaged over 3 years 40 CFR 50.11: Lead (Pb) Primary and Secondary 0.15 μg/m 3: Rolling 3 months Not to be exceeded 40 CFR 50.12
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In atmospheric chemistry, NO x is shorthand for nitric oxide (NO) and nitrogen dioxide (NO 2), the nitrogen oxides that are most relevant for air pollution. [1] [2] These gases contribute to the formation of smog and acid rain, as well as affecting tropospheric ozone.
Nitrogen oxides (NO x), particularly nitrogen dioxide, are expelled from high temperature combustion, and are also produced during thunderstorms by electric discharge. They can be seen as a brown haze dome above or a plume downwind of cities. Nitrogen dioxide is a chemical compound with the formula NO 2. It is one of several nitrogen oxides.
The California Air Pollution Control District Act of 1947 allowed 1 or more counties to form air pollution districts. [5] [6] The California Bay Area Pollution Control Act of 1955 created the Bay Area Air Pollution Control District. [5] [7] The California Mulford-Carrell Air Resources Act of 1967 resulted in the creation of 11 air basins. [5] [8]