The naaqs are set using scientific knowledge to inform the. Information is current as of the green book posted date and is available in reports, maps and data downloads. The clean air act identifies two types of national ambient air quality standards. To provide a quantitative assessment of pm exposures and health risks as one of the key information inputs to the administrator in order to make an informed decision regarding the pm naaqs. Co, nox, no2, benzene, toluene and oxylene concentrations peaked in autumn and winter, a pattern similar to those recorded for pm10 and pm102. Published by the arab school for science and technology asst. Air quality indices, sources and impact on human health of. This aspect has motivated experimentation with novel control methods that. The ambient standards for pm10 were set at 50 and 150. The sources of these can be natural volcanoes, dust storms, forest fires etc as well as manmade burning of fossil fuels in vehicles, powe.
Environmental protection agencys national center for environmental assessment and the office of air quality planning and standards. Revised national ambient air quality standards kalpana palkhiwala writes. Be aware that this method determines instack pm10 and pm2. The epa green book provides detailed information about area national ambient air quality standards naaqs designations, classifications and nonattainment status. Primary standards provide public health protection, including protecting the health of sensitive populations such. These pm10 standards where in place until 1997 when the usepa proposed revised particulate matter standards that at this time are still only pro. Environmental pollution remains a serious issue in the developing world, affecting the lives of billion people, reducing their life expectancy, and damaging childrens growth and development. Chapter 2 air quality monitoring, data, and analysis.
Select one of the naaqs below to view information about designated. Environmental quality incentives program eqip fiscal. Particulate matter pm is measured by its size in microns 1 micron 1 millionth of a meter, or a thousandth of a millimeter quite small. The level of the annual standard is defined to one decimal place i. National ambient air quality standards naaqs, pronounced \naks\ are limits on. Established by the united states environmental protection agency epa under authority of the clean air act 42 u. National ambient air quality standards are the standards for ambient air quality set by the central pollution control board cpcb that is applicable nationwide. The government has recently revised the national ambient air quality standards naaqs and limits for 12. Twentyfour hour aaqss for particulate matter standard.
Table of historical pm naaqs history of the national ambient air quality standards for particulate matter during the period 19712012. Nonattainment or predesignated attainment maintenance area for the 1987 24hour pm10 naaqs. Role of science and judgment in setting national ambient air quality. The influence of pm and pm on air pollution index api. Pm 10 is particulate matter 10 micrometers or less in diameter, pm 2.
History video early implementation of the clean air act of 1970 in california. Some ideas about the sources of pm10 sciencedirect. Epa has set naaqs for the six criteria pollutants carbon monoxide, particulate. Version 08009 192008 limited to 1992 nlcd conus only version 16 11620 included minor enhancements and bug fixes limited to 1992 nlcd conus only. An aqi value of 100 generally corresponds to the national ambient air quality standard naaqs for. Air quality monitoring, data, and analysis 2006 pm10 plan 22 2. Pm10 is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms the free dictionary.
Ambient air quality refers to the condition or quality of air surrounding us in the outdoors. These areas experience air pollution levels that persistently exceed the naaqs established by the clean air act. Specific nonattainment history for each of the criteria pollutants for the state of indiana is provided below. Units of measure are micrograpms per cubic meter of air gm3. Looking for online definition of pm10 or what pm10 stands for. Our analysis indicates that regional nox reductions are the most effective way to meet the current standard in most cities that are currently violating the ozone naaqs to better understand the effects of substantial emissions reductions on spatial and temporal patterns of ozone, we look at how ozone will change with 50% and 75% cuts in us. Many of you will have heard people talk about pm 10 and pm 2. The national ambient air quality standards naaqs for. A history of the us national ambient air quality standards. Table 2 average concentrations of tsp, pm10 and pm2. All results were higher than aqls of eeaa, usepa, and ec although pm10 and pm2. Particulate air pollution is defined by the us epa as an airsuspended mixture of both solid and liquid particles. F the class ii significant impact levels are found in 40 cfr 51.
Particulate matter pm standards planning documents. National ambient air quality standards naaqs, in the united states, allowable levels of harmful pollutants set by the environmental protection agency epa in accordance with the clean air act caa. History of particulate matter pm and total suspended particles tsp. E the pm10, so2 and no2 class i significant impact levels are based on the july 23, 1996 proposed rulemaking 61 fr 38249.
Epa also monitors and regulates pm10, which refers to particles less than. The caa established two types of standards for ambient air quality. The epa is proposing to approve in part and disapprove in part the limited maintenance plan lmp submitted by the state of idaho on december 14, 2011, for the sandpoint nonattainment area sandpoint naa for particulate matter with an aerodynamic diameter less than or equal to a nominal 10. Literature comparing national ambient air quality standards aaqss globally is scattered and sparse. Atmospheric particulate matter is microscopic solid or liquid matter suspended in the earths atmosphere. The pm rea assesses human exposure and health risks for particulate matter. Nonattainment areas for criteria pollutants green book. Table of historical particulate matter pm national. Primary standards concern the minimum level of air quality necessary to keep people from becoming ill and therefore are aimed. An introduction to air pollution definitions, classifications, and history.
Air quality community of practice projectlevel quantitative hotspot analyses for pm 2. Operationinstruction manual, and all other necessary. It provides an excellent history of the naaqs, and it will become one of the. By way of comparison, a human hair is about 100 micrometres, so roughly 40 fine particles could be placed on its width. As the name suggests, pm10 is a particulate that is 10 microns in size. The atmosphere is the earths largest single shared resource, which protects and supports life through the absorption of dangerous. The cpcb has been conferred this power by the air prevention and control of pollution act, 1981. Final rule primary secondary indicator averaging time level form. Units of measure are micrograpms per cubic meter of. They are often separated into three classifications. The national mining association nma and the national cattlemens beef association ncba, two bodies that provide significant business and job activity in the western united states, have joined forces to both oppose and support different elements of epas proposal to revise the national ambient air quality standards naaqs for both coarse and fine particulate matter pm.
The clean air act, which was last amended in 1990, requires epa to set national ambient air quality standards 40 cfr part 50 for pollutants considered harmful to public health and the environment. Pm10 and pm2 5 pdf general guidance on pm10 and pm2. Primary standards provide public health protection, including protecting the health of sensitive populations. The nations air quality standards for particulate matter were first established in 1971 and were not significantly revised until 1987, when epa established the pm 10 naaqs, changing the indicator of the standards to regulate respirable particles less than or equal to 10 microns in diameter about 17 th the average width of a human hair. National ambient air quality standards naaqs, pronounced \naks\ are limits on atmospheric concentration of six pollutants that cause smog, acid rain, and other health hazards. Current and historical list of nonattainment areas by county pdf map of. The 2006 national ambient air quality standards naaqs for particulate matter pm congressional research service summary on october 17, 2006, the environmental protection agency epa published its final revisions to the national ambient air quality standards naaqs for particulate matter particulates, or pm. In 2006, the usepa revoked the annual pm 10 standard 71 fed.
1591 714 106 1303 913 550 1107 891 1215 658 135 1152 1145 1547 535 1156 1450 261 1381 1166 1435 1008 998 447 1561 112 1289 888 257 867 1309 81 403 852 94 895 721 425