SmogRank / Thailand / Ang Thong / Ban Thai Tan

Ban Thai Tan, month by month

Ban Thai Tan has a measured daily mean on 731 days since 1 January 2023. Its worst month was January 2024, at 152 US AQI (57.0 µg/m³), 23rd of 2,385 cities on that month's world ranking. Its cleanest was June 2026, at 40 US AQI (7.2 µg/m³).

Every month since 2023

202677 so far255 days measured296th of 2,798 in the world
Jan129#54Feb98#204Mar83#385Apr111#136May63#404Jun40#1,374Jul3 daysAug47#1,422Sep52#733Oct63#205
2025too few days for a mean (a year needs 256)224 days measured
Jan5 daysFeb91#206Mar87#332Apr81#231May56#623Jun52#1,391JulnoneAug6 daysSep69#237Oct10 daysNov12 daysDec95#279
2024too few days for a mean (a year needs 257)174 days measured
Jan152#23Feb124#44Mar17 daysApr102#57May13 daysJun52#700Jul18 daysAug19 daysSep6 daysOct3 daysNov3 daysDec1 day
2023too few days for a mean (a year needs 256)78 days measured
Jan16 daysFeb2 daysMar9 daysApr16 daysMay15 daysJun10 daysJul4 daysAug3 daysSep3 daysOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Ban Thai Tan's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Ban Thai Tan marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Unhealthy for sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

26 months
MonthWhy
Jul 20263 of 31 days measured; a month needs 22. The others: 27 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours).
Nov 202512 of 30 days measured; a month needs 21. The others: 18 with no readings from the monitor.
Oct 202510 of 31 days measured; a month needs 22. The others: 21 with no readings from the monitor.
Aug 20256 of 31 days measured; a month needs 22. The others: 24 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours).
Jul 2025No day measured. The others: 30 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours).
Jan 20255 of 31 days measured; a month needs 22. The others: 26 with readings for part of the day (a day needs 18 hours).
Dec 20241 of 31 days measured; a month needs 22. The others: 30 with readings for part of the day (a day needs 18 hours).
Nov 20243 of 30 days measured; a month needs 21. The others: 27 with readings for part of the day (a day needs 18 hours).
Oct 20243 of 31 days measured; a month needs 22. The others: 28 with readings for part of the day (a day needs 18 hours).
Sep 20246 of 30 days measured; a month needs 21. The others: 24 with readings for part of the day (a day needs 18 hours).
Aug 202419 of 31 days measured; a month needs 22. The others: 12 with readings for part of the day (a day needs 18 hours).
Jul 202418 of 31 days measured; a month needs 22. The others: 12 with readings for part of the day (a day needs 18 hours), 1 with readings left out by our checks.
May 202413 of 31 days measured; a month needs 22. The others: 15 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours).
Mar 202417 of 31 days measured; a month needs 22. The others: 3 with no readings from the monitor, 11 with readings for part of the day (a day needs 18 hours).
Dec 2023No day measured. The others: 31 with readings for part of the day (a day needs 18 hours).
Nov 2023No day measured. The others: 30 with readings for part of the day (a day needs 18 hours).
Oct 2023No day measured. The others: 10 with no readings from the monitor, 21 with readings for part of the day (a day needs 18 hours).
Sep 20233 of 30 days measured; a month needs 21. The others: 27 with readings for part of the day (a day needs 18 hours).
Aug 20233 of 31 days measured; a month needs 22. The others: 6 with no readings from the monitor, 22 with readings for part of the day (a day needs 18 hours).
Jul 20234 of 31 days measured; a month needs 22. The others: 8 with no readings from the monitor, 18 with readings for part of the day (a day needs 18 hours), 1 missing from OpenAQ's archive.
Jun 202310 of 30 days measured; a month needs 21. The others: 20 with readings for part of the day (a day needs 18 hours).
May 202315 of 31 days measured; a month needs 22. The others: 3 with no readings from the monitor, 13 with readings for part of the day (a day needs 18 hours).
Apr 202316 of 30 days measured; a month needs 21. The others: 12 with readings for part of the day (a day needs 18 hours), 2 missing from OpenAQ's archive.
Mar 20239 of 31 days measured; a month needs 22. The others: 3 with readings for part of the day (a day needs 18 hours), 19 missing from OpenAQ's archive.
Feb 20232 of 28 days measured; a month needs 20. The others: 1 with readings for part of the day (a day needs 18 hours), 25 missing from OpenAQ's archive.
Jan 202316 of 31 days measured; a month needs 22. The others: 9 with readings for part of the day (a day needs 18 hours), 6 missing from OpenAQ's archive.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Ban Thai Tan's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2024 15257.0 µg/m³24 of 3123rdof 2,385–
January 2026 12946.9 µg/m³31 of 3154thof 2,617–
February 2024 12445.0 µg/m³21 of 2944thof 2,486Thailand, February 2024
April 2026 11139.6 µg/m³30 of 30136thof 2,941–
April 2024 10235.9 µg/m³25 of 3057thof 2,520–
February 2026 9834.3 µg/m³28 of 28204thof 2,866–

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.

Ban Thai Tan's worst days

DayUS AQIEpisode
14 Feb 2024 18299.2 µg/m³Thailand, February 2024
24 Jan 2025 17792.8 µg/m³Northern Thailand, January 2025
1 Feb 2023 17183.7 µg/m³–
25 Jan 2025 17083.1 µg/m³Northern Thailand, January 2025
10 Jan 2024 16779.0 µg/m³–
24 Jan 2023 16677.4 µg/m³–
13 Feb 2024 16676.6 µg/m³Thailand, February 2024
23 Jan 2024 16676.3 µg/m³–
20 Jan 2024 16576.0 µg/m³–
16 Apr 2023 16474.7 µg/m³Thailand, April 2023

Daily means, the highest since 1 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, Ban Thai Tan, Thailand, 1 Jan 2023 – 12 Oct 2026. Monitor data from Air4Thai via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/th/ban-thai-tan/history (accessed 13 Oct 2026).

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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.

Ban Thai Tan 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).