Situation in smog in the country's northern Thai In the month of February, data from the Office of air quality and sound management. Department of pollution control. Whether from measuring smog air quality in northern areas (dated on February 19, 2012) found a quantity of dust the size does not exceed 10 micron (PM10) 24-hour average values between 43.6 – 164.8 maikhrokram per cubic meter. Overall air quality is moderate and affect the health situation of the pollution problem! occur every year in the country's northern Thai. Usually occurs in late winter to the dry season. Around March to April of every year, particularly in Chiang Mai, lamphun, Lampang, Mae Hong Son and Chiang Rai province. Experiencing problems with smog and pollution in the air is higher than normal because of the areas most northern community, located in the plains of rivers, which are surrounded by mountains, the basin has a frying pan. Cause smog to Designer cannot be distributed. Normally, air pollution and smog will float up into the air, about 3-5 kilometers high, but when there are high mountain walls and community areas or cities with a basin pan, the smog and pollution accumulates in the atmosphere is to cause harmful to health and the environment, causing smog in the North is the problem comes from the story of the. "Burnt" burnt offerings in the area of agriculture. Burning of weeds along the trail and the burning of forests which cause smog and dust ash carbon smoke. Released into the air.The situation in the various provincial smog Northern lamphun province area in the smog situation is now considered to be worried about because it still detects a high quantity of small particulates exceed standards and values in health care that affect the level of ongoing contact for several days. The latest data on past Feb. 18, lamphun detected dust quantity size not exceeding 10 24-hour average surface roughness at 208.13 maikhrokram per cubic meter. While the standard is 120 maikhrokram per cubic meter, the highest of the country.
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