Live PM2.5 · 4-day forecast
Data: NEA via data.gov.sg · Open-Meteo / CAMS · boundaries: URA Master Plan 2019 · water © OpenStreetMap contributors · coastlines: Natural Earth · rain: NEA gauges & 2-hr forecast, Open-Meteo. US AQI uses the EPA PM2.5 formula (as aqicn.org). Forecast is a ~40 km model nudged toward the latest reading — island-wide trend, not street-level.