What is the air quality like at post (good/moderate/bad)? Are there seasonal air quality issues? Does the air quality have an impact on health?
The air pollution is terrible in the winter, so you'll need to wear a mask. Because of that, if you have asthma or breathing conditions then it will affect you. People try to leave the city on weekends to get clean air. The summer still has moderate pollution. - Jul 2019
See above. Terrible, simply terrible winter air pollution from October through March/April. Some children develop respiratory problems. Face masks are a necessity. - Oct 2016
Seriously bad in winter - according to WHO the worst air quality of any capital city. Half of the population lives in traditional tents, using coal for heating. The result is heavy smoke that gets trapped in the valley which UB finds itself in, and which functions as a natural windbreak. Heavy duty air purifiers are essential, as are regular excursions outside of UB for a breath of fresh air. Air quality in summer is fine. - Feb 2015
Ulaanbaatar is the most polluted city in the world in the wintertime. The combination of coal-fired stove smoke from the gers, the coal-fired and unscrubbed smoke from the power plants and the automobile exhaust is horrendous. Face masks when outside and air purifiers in your home are required. Bronchitis is common. The pollution mostly clears up by April and returns in November. - May 2012
2nd worst in the world. - Feb 2012
The world's worst level of pollution occurs during winter, which is from October - April. Mongolians are still very much a traditional nomadic people. Gers (gares), which look like big tents, are the traditional housing for Mongolians. Gers do not have indoor plumbing or electricity so heat is provided by coal-burning stoves. Mongolians will burn almost anything, including tires, to stay warm. The U.S. Embassy is located in a geographical bowl, with mornings being the worst; with visibility reduced to less than 100 yards. Summer is the best time to be be in this country. The air is barely polluted and visibility is at its best. - Feb 2011