Seasonal risk score
- Very high 75–100
- High 50–74
- Moderate 30–49
- Low 0–29
- Insufficient data
Compare zones
How the score is built
Thai Haze Risk answers one question: over several seasons, which zones of northern Thailand are least affected by agricultural burning? It is not a real-time air quality app. For today's readings, use a live sensor network.
Sources
| Endpoint | Used for | Depth |
|---|---|---|
| disasters/burnt-area-latest-365 | Share of sampled points detected burnt, and burn dates for the last season | Rolling 365 days |
| disasters/drought-recurrence | Years with a drought event, per zone | 2018–2023 (6 years) |
| fundamental/soil-moisture-weekly | Vegetation dryness context | Weekly snapshot |
All zone geometry is sampled on a point grid, which is why the map shows sampled zones rather than filled administrative polygons. Sub-district (tambon) is the finest level at which drought and soil moisture return data.
Composite score
The score weights burnt-area share of the last 365 days at 55%, drought recurrence over 2018–2023 at 30%, and soil moisture class at 15%. Burnt area is the one input every zone needs to be scored at all; where drought recurrence and/or soil moisture are unavailable for a zone (common — see "Stated limits"), the remaining weights are renormalized rather than withholding the score entirely, and the zone is flagged as partial coverage. A zone only carries no score when even burnt area returns nothing for that point.
Stated limits
- GISTDA exposes burnt area on a rolling 365-day window only. There is no multi-year fire history at launch, so the fire trend accumulates one data point per season from now on. Zones added this year show "first season tracked".
- Drought recurrence is the only genuine multi-year depth available today.
- Burnt area is a proxy for exposure, not a measurement of the PM2.5 a resident breathes. Wind, elevation and valley geometry move smoke far from where it is produced.
- Some zones return "not found" for drought recurrence — about 46% of tambons nationwide (385 of 832) as of the 2026-08-12 pipeline run. Coverage is reported per zone, never smoothed over.
- All 832 tambons across the 9 target provinces carry real values from the batch pipeline (GISTDA point-grid sampling per official tambon boundary), last run 2026-08-12.
WHO reference, regional context
These figures describe the region during peak burning season and are not zone-level measurements produced by this tool. They are here to size the problem the score is about.