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WEAGovernment ยท NEA via data.gov.sg

NEA PSI (Pollutant Standards Index)

Hourly PSI and pollutant concentration readings (PM2.5, PM10, SO2, CO, O3, NO2) for the five regions of Singapore. The go-to source during haze season.

How to authenticate

2 stops to a working call

  1. 1No key needed; the endpoint is public.
  2. 2Optional: request a data.gov.sg API key for higher rate limits and send it as x-api-key.

Example request

Request
curl 'https://api-open.data.gov.sg/v2/real-time/api/psi'

Example response

Response (truncated)
{"code":0,"data":{"regionMetadata":[{"name":"central","labelLocation":{"longitude":103.82,"latitude":1.35735}}]}}

NEA PSI (Pollutant Standards Index): common questions

Is the NEA PSI (Pollutant Standards Index) free?

Yes. NEA via data.gov.sg offers the NEA PSI (Pollutant Standards Index) free of charge.

Does the NEA PSI (Pollutant Standards Index) need an API key?

No. The NEA PSI (Pollutant Standards Index) can be called without an API key or login.

What is the NEA PSI (Pollutant Standards Index) endpoint?

The base URL is https://api-open.data.gov.sg/v2/real-time/api/psi. A working example: curl 'https://api-open.data.gov.sg/v2/real-time/api/psi'

Notes for AI agents

v2 uses camelCase keys; v1 (api.data.gov.sg/v1/environment/psi) uses snake_case and still works. psi_twenty_four_hourly is the headline number people mean by PSI.

Machine-readable version: /api/apis/nea-psi

On the same line

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NEA 2-Hour Weather Forecast

NEA via data.gov.sg

Area-level weather forecast for the next 2 hours across 47 Singapore planning areas, refreshed every 30 minutes. Returns forecast text (e.g. Thundery Showers) plus label coordinates per area.

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NEA 24-Hour Weather Forecast

NEA via data.gov.sg

General 24-hour outlook for Singapore with per-region (north, south, east, west, central) forecasts in time blocks, plus temperature, humidity and wind ranges. Updated multiple times a day.

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NEA Dengue Clusters (GeoJSON)

NEA via data.gov.sg

Current dengue cluster boundaries as GeoJSON, published by NEA and refreshed on data.gov.sg. Fetch via the dataset poll-download API which returns a signed S3 download URL.

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NEA Real-Time Air Temperature

NEA via data.gov.sg

Air temperature readings in degrees Celsius from island-wide NEA stations, updated every minute. Useful for hyperlocal current conditions.

No authfreeWeather & Environment