Singapore's air quality rebounds to healthy levels after weeks of poor conditions

Air quality across Singapore has improved markedly, with the 24-hour Pollutant Standards Index (PSI) ranging from 71 to 99 at 3pm on Tuesday. All regions recorded readings in the 'good to moderate' category, signalling relief from the prolonged period of poor air quality that has persisted over the past three weeks.

The improvement represents a significant turnaround from the unhealthy air conditions that blanketed Singapore for 18 consecutive days. During that period, residents faced elevated pollution levels that prompted health advisories and disrupted outdoor activities across the nation.

The PSI scale classifies readings of 0-50 as 'good', 51-100 as 'moderate', 101-200 as 'unhealthy', 201-300 as 'very unhealthy', and above 300 as 'hazardous'. Tuesday's readings indicate conditions have returned to levels that pose minimal health concerns for the general population.

Meteorological shifts and reduced transboundary haze from regional sources are typically cited as factors influencing air quality improvements in Singapore. Residents and environmental authorities have welcomed the return to healthier air conditions, though observers continue to monitor atmospheric patterns for any deterioration.