SmogRank / World / Asia / Thailand / Samut Prakan

Most polluted cities in Samut Prakan, Thailand

3 measured cities, this year; 3 above the WHO annual guideline. Worst: Phra Pradaeng at 22.0 µg/m³, #443 in the world.

Bangkok: 14 measured citiesSamut Prakan: 3 measured citiesChachoengsao: 1 measured cityChon Buri: 2 measured citiesSamut Sakhon: 1 measured city#3 Samut Prakan: 17.4 µg/m³#2 Bang Bo District: 21.5 µg/m³#1 Phra Pradaeng: 22.0 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Phra Pradaeng 22.0 µg/m³ 20 µg/m³5 WHO annual guideline
Every measured city in Samut Prakan, Thailand, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Phra Pradaeng 24.4×
  2. 2Bang Bo District 24.3×
  3. 3Samut Prakan 23.5×
Low1–3
Moderate4–6
High7–9
Very high10

The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Estimated: cities without a monitor

Samut Prakan cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Ban Khlong Bang Sao Thong≈ 12 µg/m³Low

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SmogRank, most polluted cities in Samut Prakan, Thailand, PM2.5, this year to 2 Oct 2026, 07:00 UTC, smogrank.com/th/region/samut-prakan?w=year.

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Updated 2026-10-02 07:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the UK DAQI PM2.5 sub-index.