SmogRank / Thailand / Chachoengsao / Bang Pakong

Bang Pakong, month by month

Bang Pakong has a measured daily mean on 519 days since 15 February 2025. Its worst month was March 2025, at 110 US AQI (39.3 µg/m³), 166th of 2,862 cities on that month's world ranking. Its cleanest was August 2026, at 18 US AQI (3.3 µg/m³).

Every month since 2025

202666 so far248 days measured464th of 2,791 in the world
Jan19 daysFeb5 daysMar91#259Apr92#218May57#551Jun28#2,160Jul35#2,347Aug18#2,875Sep53#657Oct69#122
202567 for the year271 days measured311th of 2,681 in the world
JanFeb14 daysMar110#166Apr74#286May61#419Jun38#2,042Jul35#2,207Aug24#2,784Sep41#1,562Oct59#385NovnoneDec95#277
Each square is a month's mean PM2.5 in US AQI from Bang Pakong'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 Bang Pakong marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
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

4 months
MonthWhy
Feb 20265 of 28 days measured; a month needs 20. The others: 23 with under 18 hours of readings or readings that failed our checks.
Jan 202619 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Nov 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Feb 202514 of 28 days measured; a month needs 20.

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

Bang Pakong's worst months

MonthUS AQIDays measuredWorld rankEpisode
March 2025 11039.3 µg/m³29 of 31166thof 2,862Thailand and Laos, March 2025
December 2025 9532.8 µg/m³29 of 31277thof 3,006–
April 2026 9231.2 µg/m³30 of 30218thof 2,941–
March 2026 9130.6 µg/m³30 of 31259thof 2,971–
April 2025 7421.7 µg/m³30 of 30286thof 2,951–
May 2025 6114.6 µg/m³31 of 31419thof 2,826–

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 Pakong's worst days

DayUS AQIEpisode
15 Jan 2026 17184.1 µg/m³–
23 Mar 2025 16980.5 µg/m³Thailand and Laos, March 2025
24 Mar 2025 16270.6 µg/m³Thailand and Laos, March 2025
14 Jan 2026 15967.2 µg/m³–
16 Jan 2026 15865.9 µg/m³–
13 Jan 2026 15865.1 µg/m³–
15 Feb 2025 15663.0 µg/m³–
1 Jan 2026 15561.1 µg/m³–
2 Dec 2025 15460.3 µg/m³–
22 Mar 2025 15358.3 µg/m³Thailand and Laos, March 2025

Daily means, the highest since 15 Feb 2025; 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 Pakong, Thailand, 15 Feb 2025 – 12 Oct 2026. Monitor data from AirGradient via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/th/bang-pakong/history (accessed 12 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.

Bang Pakong now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 20:07 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).