Advice for the worst area, from NEA's guide. Your area may be better — check the map below.
Heading out in the next hour? Check the 1-hour PM2.5 reading on haze.gov.sg or the myENV app. It reacts faster than PSI.
Tap a region to see which towns it covers.
The worst reading each day, then hour by hour. Press play to replay the week on the map above.
Short summaries of the National Environment Agency's daily haze updates.
Every NEA haze update since 4 Sep has pointed to fires in southern Sumatra, Kalimantan or both. NEA says the smoke reaches Singapore when winds blow from the south, southeast or east.
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PSI averages the last 24 hours, so it can stay high after the air clears. On 27 Sep, rain cleared the air, yet PSI still read 119 that evening since the average included the smoky hours beforehand.
Weather comes from one station at Changi Airport, so it can differ from conditions in the west.
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What is r? A score from −1 to +1 for how closely two things move together: near 0 is no clear link, beyond ±0.5 is strong, plus means both rise together, minus means one falls as the other rises. One week of data from one station — treat these as hints, not proof.
PSI (Pollutant Standards Index) is the number NEA uses for daily planning. It averages air quality over the past 24 hours, so it moves slowly.
PM2.5 is the amount of fine particles in the air, such as smoke. This page shows the 24-hour average, alongside PSI; the 1-hour PM2.5 reading on haze.gov.sg reacts faster, for decisions in the next hour.
Regions follow NEA's five reporting areas. The town lists are our own rough grouping, by which region's centre each town is nearest to. They are not an official NEA list.
