The National Ambient Air Quality Standards (NAAQS) are standards established by the United States Environmental Protection Agency that apply for outdoor air throughout the country. The United States of America —commonly referred to as the Temperature and layers The temperature of the Earth's atmosphere varies with altitude the mathematical relationship between temperature and altitude varies among five Primary standards are designed to protect human health, with an adequate margin of safety, including sensitive populations such as children, the elderly, and individuals suffering from respiratory disease. Secondary standards are designed to protect public welfare from any known or anticipated adverse effects of a pollutant (e. g. building facades, visibility, crops, and domestic animals). In Architecture, Construction, Engineering and real estate development the word building may refer to one of the following Any man-made A facade or façade (fəˈsɑːd is generally one side of the exterior of a Building, especially the front but also sometimes the sides and rear Agriculture refers to the production of goods through the growing of plants and fungi and the raising of domesticated Animals The study of agriculture This is a list of animals that have been domesticated by Humans.
NAAQS requires the EPA to set standards on six criteria air contaminants:
The standards are listed in Title 40 of the Code of Federal Regulations Part 50. Carbon monoxide, with the chemical formula CO is a colorless odorless tasteless yet highly toxic Gas. The term nitrogen oxide typically refers to any Binary compound of Oxygen and Nitrogen, or to a mixture of such compounds Nitric Characteristics Lead has a dull luster and is a dense, Ductile, very soft highly Title 40 is a part of the United States Code of Federal Regulations.
|Pollutant||Type||Standard||Averaging Timea||Regulatory Citation|
|SO2||Primary||0. 14 ppm (365 μg/m3)||24-hour||40 CFR 50. "Parts-per" notation is used especially in Science and Engineering, to denote Ratios (relative proportions in measured quantities particularly In the Metric system, a microgram is 1/1000000 of a Gram (1 × 10-6 or 1/1000 of a milligram is one of the smallest units of weight/mass commonly used CM3 redirects here If you were looking for the 3rd game in the Cooking Mama series abbreviated as CM3 see here. The Code of Federal Regulations (CFR is the codification of the general and permanent rules and regulations (sometimes called administrative law) published in the 4(b)|
|SO2||Primary||0. 030 ppm (80 μg/m³)||annual||40 CFR 50. 4(a)|
|SO2||Secondary||0. 5 ppm (1,300 μg/m³)||3-hour||40 CFR 50. 5(a)|
|PM10||Primary and Secondary||150 μg/m³||24-hour||40 CFR 50. 6(a)|
|PM2. 5||Primary and Secondary||35 μg/m³||24-hour||40 CFR 50. 7(a)|
|PM2. 5||Primary and Secondary||15 μg/m³||annual||40 CFR 50. 7(a)|
|CO||Primary||35 ppm (40 mg/m³)||1-hour||40 CFR 50. For other uses of the words gram or gramme see Gram (disambiguation. 8(a)(2)|
|CO||Primary||9 ppm (10 mg/m³)||8-hour||40 CFR 50. 8(a)(1)|
|O3||Primary and Secondary||0. 12 ppm (235 μg/m³)||1-hourb||40 CFR 50. 9(a)|
|O3||Primary and Secondary||0. 075 ppm (235 μg/m³)||8-hour||40 CFR 50. 10(a)|
|NO2||Primary and Secondary||0. 053 ppm (100 μg/m³)||annual||40 CFR 50. 11(a) and (b)|
|Pb||Primary and Secondary||1. 5 μg/m³||quarterly||40 CFR 50. 12|
Note a: Each standard has its own criteria for how many times it may be exceeded, in some cases using a three year average.
Note b: As of June 15, 2005, the 1-hour ozone standard no longer applies to areas designated with respect to the 8-hour ozone standard (which includes most of the United States, except for portions of 10 states).