SmogRank / Thailand / Samut Prakan / Bang Bo District
Bang Bo District, month by month
Bang Bo District has a measured daily mean on 924 days since 3 January 2023. Its worst month was January 2024, at 107 US AQI (38.0 µg/m³), 74th of 2,385 cities on that month's world ranking. Its cleanest was September 2025, at 52 US AQI (9.5 µg/m³).
Every month since 2023
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Months without a mean, and why
17 months
| Month | Why |
|---|---|
| Oct 2026 | 4 of 12 days measured; a month needs 9. The others: 5 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours). |
| Sep 2026 | 20 of 30 days measured; a month needs 21. The others: 10 with readings for part of the day (a day needs 18 hours). |
| Jul 2026 | 2 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks. |
| Dec 2025 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Nov 2025 | 12 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Oct 2025 | 7 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks. |
| Aug 2025 | 6 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks. |
| Jul 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| May 2025 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Jan 2025 | 4 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks. |
| Dec 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2024 | 3 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | 11 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 8 of 31 days measured; a month needs 22. The others: 19 missing from OpenAQ's archive, 4 with under 18 hours of readings or readings that failed our checks. |
| Feb 2023 | 2 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks. |
| Jan 2023 | 13 of 31 days measured; a month needs 22. The others: 7 missing from OpenAQ's archive, 9 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Bang Bo District's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2024 | 10738.0 µg/m³ | 74thof 2,385 | – |
| January 2026 | 10637.6 µg/m³ | 105thof 2,617 | – |
| February 2025 | 10235.8 µg/m³ | 141stof 2,633 | – |
| March 2025 | 8929.7 µg/m³ | 300thof 2,862 | Thailand and Laos, March 2025 |
| April 2023 | 8929.6 µg/m³ | 52ndof 1,622 | Thailand, April 2023 |
| February 2024 | 8829.1 µg/m³ | 112thof 2,486 | – |
Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.
Bang Bo District's worst days
| Day | US AQI | Episode |
|---|---|---|
| 25 Jan 2025 | 16170.1 µg/m³ | Northern Thailand, January 2025 |
| 1 Feb 2023 | 15967.3 µg/m³ | Northern Thailand and Laos, January and February 2023 |
| 14 Feb 2024 | 15663.0 µg/m³ | – |
| 15 Jan 2026 | 15662.5 µg/m³ | – |
| 28 Jan 2026 | 15560.9 µg/m³ | – |
| 3 Dec 2025 | 15358.7 µg/m³ | Thailand and Laos, November and December 2025 |
| 14 Jan 2026 | 15358.2 µg/m³ | – |
| 13 Feb 2024 | 15358.0 µg/m³ | – |
| 28 Jan 2024 | 15256.9 µg/m³ | – |
| 12 Feb 2025 | 15156.2 µg/m³ | – |
Daily means, the highest since 3 Jan 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.
Use this history
SmogRank, PM2.5 monthly and daily means, Bang Bo District, Thailand, 3 Jan 2023 – 12 Oct 2026. Monitor data from Air4Thai via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/th/bang-bo-district/history (accessed 13 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Bang Bo District now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 05:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).