Haze Watch

A single-page haze and weather monitor.

• Singapore tab: NEA 24-hour PSI by region (north, south, east, west, central) on a map of Singapore's 28 postal districts, with PM2.5, PM10 and main pollutant, plus Open-Meteo weather and a four-day outlook.
• ASEAN cities tab: Open-Meteo weather for 12 cities (the 11 ASEAN capitals and Pekanbaru).

Data

What	Source	Coverage
PSI, PM2.5, PM10	National Environment Agency via data.gov.sg real-time PSI API	Singapore only
Weather	Open-Meteo forecast API	All cities

The values in index.html are a snapshot taken 28 Oct 2026, 10:15 SGT. The page does not refresh itself. Postal-district shapes are an approximate drawing, each shaded by the NEA region it falls in.

Deploy on Vercel

It is a static site with no build step.

1. Import this repository in Vercel.
2. Framework preset: Other. Leave build command and output directory empty.
3. Deploy. vercel.json only adds clean URLs and a few security headers.

To preview locally, open index.html in a browser.

Making the data live

Browsers can call both APIs directly. To refresh on load, fetch these and replace the embedded NEA and CITIES objects in the script:

• https://api-open.data.gov.sg/v2/real-time/api/psi
• https://api.open-meteo.com/v1/forecast with current and daily parameters (see the CITIES structure for the fields used)