SmogRank / Thailand / Amnat Charoen / Amnat Charoen

Amnat Charoen, month by month

Amnat Charoen has a measured daily mean on 671 days since 24 January 2023. Its worst month was April 2024, at 137 US AQI (50.0 µg/m³), 28th of 2,520 cities on that month's world ranking. Its cleanest was June 2026, at 53 US AQI (10.1 µg/m³).

Every month since 2023

202674 so far253 days measured325th of 2,793 in the world
Jan85#201Feb84#318Mar93#228Apr114#128May72#276Jun53#648Jul3 daysAug53#830Sep54#598Oct63#229
2025too few days for a mean (a year needs 256)219 days measured
Jan5 daysFeb81#279Mar116#137Apr117#73May72#264Jun63#386JulnoneAug6 daysSep58#425Oct10 daysNov12 daysDec69#564
2024too few days for a mean (a year needs 257)197 days measured
Jan65#376Feb114#57Mar19 daysApr137#28May83#81Jun55#414Jul17 daysAug19 daysSep5 daysOct2 daysNov3 daysDec1 day
2023too few days for a mean (a year needs 256)2 days measured
Jan2 daysFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Amnat Charoen'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 Amnat Charoen 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

25 months
MonthWhy
Jul 20263 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Nov 202512 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks.
Oct 202510 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Aug 20256 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks.
Jul 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jan 20255 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks.
Dec 20241 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Nov 20243 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Oct 20242 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Sep 20245 of 30 days measured; a month needs 21. The others: 25 with under 18 hours of readings or readings that failed our checks.
Aug 202419 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jul 202417 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Mar 202419 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Dec 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2023No day measured. The others: 1 missing from OpenAQ's archive, 30 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2023No day measured. The others: 3 missing from OpenAQ's archive, 27 with under 18 hours of readings or readings that failed our checks.
Mar 2023No day measured. The others: 20 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks.
Feb 2023No day measured. The others: 25 missing from OpenAQ's archive, 3 with under 18 hours of readings or readings that failed our checks.
Jan 20232 of 31 days measured; a month needs 22. The others: 6 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.

Amnat Charoen's worst months

MonthUS AQIDays measuredWorld rankEpisode
April 2024 13750.0 µg/m³27 of 3028thof 2,520Thailand and Laos, April and May 2024
April 2025 11742.0 µg/m³23 of 3073rdof 2,951–
March 2025 11641.4 µg/m³28 of 31137thof 2,862–
February 2024 11440.7 µg/m³23 of 2957thof 2,486Thailand, February 2024
Northern Thailand, February 2024
April 2026 11440.7 µg/m³30 of 30128thof 2,941–
March 2026 9331.7 µg/m³29 of 31228thof 2,971–

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.

Amnat Charoen's worst days

DayUS AQI
26 Mar 2025 16880.1 µg/m³
27 Mar 2025 16270.7 µg/m³
14 Apr 2024 16170.1 µg/m³
9 Apr 2025 16169.8 µg/m³
25 Mar 2025 15967.2 µg/m³
17 Mar 2024 15967.1 µg/m³
13 Apr 2024 15966.6 µg/m³
8 Apr 2024 15865.3 µg/m³
3 Feb 2024 15864.8 µg/m³
29 Mar 2025 15663.3 µg/m³

Daily means, the highest since 24 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, Amnat Charoen, Thailand, 24 Jan 2023 – 12 Oct 2026. Monitor data from Air4Thai via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/th/amnat-charoen/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.

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

Updated 2026-10-12 21:07 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).