Air quality in Pai

Air quality index (AQI) and PM2.5 air pollution in Pai

Last update at (local time)

74.4K people follow this city

  • The profile image of follower
  • The profile image of follower
  • The profile image of follower
  • The profile image of follower
  • The profile image of follower
IQAir map with AQI colorful pins

Air Quality Data contributor(s)

Station(s) operated by



IQAir AirVisual logoIQAir AirVisual logo

Join the movement!

Get a monitor and contribute air quality data in your city.

Become a contributor
Find out more about contributors and data sources


What is the current weather in Pai?

Weather icon
WeatherClear sky
Wind0.4 km/h
Pressure1014 mbar

live aqi city ranking

Real-time Thailand city ranking

#cityUS AQI
1 Lampang, Lampang


2 Phayao, Phayao


3 Hang Chat, Lampang


4 Li, Lamphun


5 Nan, Nan


6 Chiang Khong, Chiang Rai


7 Mae Hong Son, Mae Hong Son


8 Warin Chamrap, Changwat Ubon Ratchathani


9 Mae Mo, Lampang


10 Phan, Chiang Rai


(local time)


live Pai aqi ranking

Real-time Pai air quality ranking

#stationUS AQI
1 Wiang Tai


2 Tin That


(local time)


#1 Air Quality App

Free iOS and Android air quality app

AirVisual App, Free iOS and Android air quality app
fire-iconActive fire 8053.1 km away
See On Map



live AQI index

Human face indicating AQI level


What is the current air quality in Pai?

Air pollution levelAir quality indexMain pollutant
Unhealthy 179 US AQItrendPM2.5



PM2.5 concentration in Pai is currently 22 times the WHO annual air quality guideline value

Health Recommendations

How to protect from air pollution in Pai?

An IQAir mask icon Wear a mask outdoors
An IQAir purifier icon Run an air purifier
An open window icon Close your windows to avoid dirty outdoor air
A man cycling icon Avoid outdoor exercise


Pai air quality index (AQI) forecast

DayPollution levelWeatherTemperatureWind
Friday, Feb 10

Unhealthy 162 US AQI

Human face indicating AQI level
Weather icon32°13°
Wind rotating 252 degree

10.8 km/h

Saturday, Feb 11

Unhealthy 172 US AQI

Human face indicating AQI level
Weather icon33°12°
Wind rotating 267 degree

7.2 km/h

Sunday, Feb 12

Unhealthy 176 US AQI

Human face indicating AQI level
Weather icon33°13°
Wind rotating 269 degree

7.2 km/h


Unhealthy 179 US AQI

Human face indicating AQI level
Weather icon34°14°
Wind rotating 272 degree

10.8 km/h

Tuesday, Feb 14

Moderate 78 US AQI

Human face indicating AQI level
Weather icon35°15°
Wind rotating 253 degree

3.6 km/h

Wednesday, Feb 15

Moderate 79 US AQI

Human face indicating AQI level
Weather icon40%34°16°
Wind rotating 151 degree

7.2 km/h

Thursday, Feb 16

Moderate 83 US AQI

Human face indicating AQI level
Weather icon90%29°17°
Wind rotating 96 degree

7.2 km/h

Friday, Feb 17

Moderate 72 US AQI

Human face indicating AQI level
Weather icon90%29°16°
Wind rotating 183 degree

3.6 km/h

Saturday, Feb 18

Moderate 69 US AQI

Human face indicating AQI level
Weather icon80%32°16°
Wind rotating 265 degree

7.2 km/h

Interested in hourly forecast? Get the app


Historic air quality graph for Pai

How to best protect from air pollution?

Reduce your air pollution exposure in Pai


What are the levels of pollution like in Pai?

Pai is a small city located in the northernmost region of Thailand, part of the Mae Hong Son province and directly adjacent to the Myanmar border. It is well known as a popular tourist destination, with a very small population of some 2,284 people living there as of 2006, with no other recent census data available. In regards to the quality of its air, Pai suffers from some particularly bad pollution, which is unusual for a town with so few people as well as having a high altitude and being surrounded on all sides by heavy forest.

High altitude and large amounts of greenery often go a long way in reducing pollution levels, so for Pai’s readings to be so elevated shows there is a cause for concern. In 2019, Pai came in with a PM2.5 reading of 38.9 μg/m³, which puts it into the ‘unhealthy for sensitive groups’ bracket, a rating that requires a PM2.5 number anywhere between 35.5 to 55.4 μg/m³ to be classed as such.

With a yearly average this high, it means that Pai indeed suffers from above average levels of pollution, to the extent that it could cause harm to sensitive demographics such as young children, those with respiratory problems as well as pregnant mothers. This reading of 38.9 μg/m³ put it in 3rd place out of all cities ranked in Thailand in 2019, as well as 250th place out of all cities ranked worldwide, a very high rating with all factors considered.

What are the main causes of air pollution in Pai?

Due to being a popular tourist destination, there would be a larger number of vehicles on the road catering specifically to tourists. These would include motorbikes and buses, as well as cars, although not as dense in number as would be seen in other more populous cities in Thailand such as Bangkok. Despite this though, a high concentration of these vehicles all squeezed into a tiny city can have a fairly significant effect on its ambient pollution levels year-round, especially with many of the vehicles running on unclean fuel sources such as diesel, a fossil fuel that gives off larger amounts of pollution that its cleaner alternatives.

The main cause of pollution in Pai however, is the problem of open burning sources. Farmers resort to the highly illegal practice of crop burning, as well as setting fire to forest areas to clear room for more farmland. These practices are usually practiced at the dead of night and in areas that are hard to reach, thus making enforcement a difficult task. It is such a large problem than many residents, particularly expatriates, will often flee from the northern region (including Chiang Mai) due to how bad these pollution levels can actually get.

When are pollution levels at their worst in Pai?

Going off of the readings taken in 2019, one can see that there are a large number of discrepancies between the months of the year, with some coming in with super clean readings, and others coming in with highly elevated numbers. The months that stood out as being the worst were February, March and April, with PM2.5 readings of 65.3 μg/m³, 141.4 μg/m³ and 120.3 μg/m³ respectively, making March the most polluted month by a long shot.

This PM2.5 reading of 141.4 μg/m³ is somewhat disastrous, when compared to its cleanest month of July, which came in with a reading of 5.4 μg/m³. The differences are worlds apart, with 141.4 μg/m³ putting Pai into the higher end of the ‘unhealthy’ rating bracket, which requires a PM2.5 reading of anywhere between 55.5 to 150.4 μg/m³ to be classed as such. A few units higher than this would put it into the ‘very unhealthy’ bracket, meaning that the air would be extremely hazardous for anyone to breathe, as well as having adverse effects on the environment and wildlife.

What are the main forms of pollution found in the air in Pai?

Due to the large concentration of vehicles such as cars and motorbikes travelling in and out of Pai, slightly elevated levels of pollutants such as nitrogen dioxide (NO2) and sulfur dioxide (SO2) would be present in the air, although not in such a large quantity as major cities like Bangkok or Chiang Mai.

Other pollutants released from motor combustion would include materials such as black carbon and volatile organic compounds (VOC’s), both of which can be caused by the incomplete combustion of fossil fuels as well as organic materials. Thus, they both would arise as the result of vehicular use, as well as the aforementioned forest and farmland fires.

In regards to the pollutants released by the open burning practices, the smog and haze given out by these fires would be packed with chemicals such as benzene, carbon monoxide (CO), aldehydes, polynuclear aromatic hydrocarbons as well as the previously mentioned black carbon and VOC’s. In the month of March when the PM2.5 levels reached 141.4 μg/m³, these pollutants would be found in such high quantity that anyone inhaling the air during this time would be subject to a large variety of health problems, as well as an increased rate of them occurring.

What are some of the health problems associated with breathing polluted air in Pai?

Once again in regards to the months that showed the highest levels of PM2.5 (February through to April), a large number of health issues may arise. These would include ones primarily affecting the respiratory system as well as the circulatory and cardiovascular systems.

With exposure to large amounts of PM2.5 and PM10, irritation to the nose, throat eyes and skin can occur, triggering off allergies and reactions in those sensitive to chemical exposure. Incidences of lung cancer would also skyrocket, as the PM2.5 can make its way deep into the lung tissue and accumulate deep within the alveoli, causing a decrease in overall lung function as well as having the chance to cross the blood barrier and enter into the circulatory system. Once these toxic materials have found their way into the blood, damage to the blood vessels, kidneys, liver and reproductive system all become possible.

Expecting mothers who are overexposed to such levels of pollution may find themselves at risk of miscarriage, or giving birth prematurely to a baby that can suffer from both physical and cognitive defects. These are to name but a few of the negative health problems associated with breathing the air during the worst months of the year. Instances of such ailments occurring during cleaner months are reduced drastically, with preventative measures in keeping pollution exposure as low as possible during the worst months being of utmost importance.

Pai air quality data attribution

Contributors 2

Data sources 1

Data validated and calibrated by IQAir

Where is the cleanest air quality in Pai?

Your cart is empty

Connect With IQAir

Sign up for our newsletter