"Air Quality"

Air quality in Bangkok, Samut Prakan, Chiang Rai, Mae Hong Son and Chiang Mai provinces hit unsafe levels on Tuesday morning, the Centre for Air Pollution Mitigation reported.

Chiang Mai once again became the world's most polluted city on Friday due to a forest fire in Doi Suthep-Pui National Park on Thursday night.

Air pollution in Bangkok, Samut Prakan, Samut Sakhon, Chiang Rai and Mae Hong Son hit unsafe levels on Wednesday morning, the Centre for Air Pollution Mitigation reported.

Air pollution in Bangkok, Samut Prakan, Samut Sakhon, Chiang Rai, Mae Hong Son and Tak provinces hit unsafe levels on Tuesday morning, the Centre for Air Pollution Mitigation reported.

The air quality in Bangkok and 31 provinces hit unsafe levels on Friday morning, according to the Centre for Air Pollution Mitigation.

With the arrival of winter, Bangkok's air quality has improved to "moderate" in the latest readings.

The Pollution Control Department (PCD) has reported air quality in Bangkok and neighbouring provinces are at "excellent" to "moderate" levels with PM2.5 under the safety standard used by the department.

Firemen in Taman Seri Andalas checking for open burning along Jalan Johan Setia.

Chiang Mai had no problem on Monday maintaining its World No 1 ranking as the most polluted city on the planet, scoring a 241 in air quality index (AQI) at airvisual.com.

Chiang Mai for the fourth consecutive day ranked the world’s most air-polluted city, with an air quality index (AQI) score of 250 at 8.20am and 3.30 pm up to 309 on airvisual.com.

Chiang Mai on Tuesday morning had the world’s worst air quality.

Sky in northern capital turns brownish as Air Quality Index gives it ‘unhealthy’ reading.