Sri Lanka, Dec. 31 -- Air quality across Sri Lanka continues to remain slightly unhealthy, according to real-time Air Quality Index (AQI) data.

Affected areas include multiple areas in Jaffna, Chilawa, Puttalam, Galle, Kandy and Colombo districts

Speaking to Daily Mirror, a senior official at the National Building Research Organisation (NBRO) said the deterioration in air quality is mainly due to polluted air drifting in from the Indian region and local pollution sources combined with prevailing atmospheric conditions that limit the dispersion of pollutants.

The official said the situation is expected to persist until around March next year.

However, he said the situation can improve from time to time.

"This condition could particula...