The Business Times
business-time-50

Eileen Ng

emaileileenng@sph.com.sg
Air quality is considered unhealthy when the 24-hour PSI is in the range of 101 to 200.

Singapore’s air quality largely at moderate levels, but PM2.5 spikes in most regions as haze persists

2026-09-28T12:35:56.000Z
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