SmogRank / Thailand / Maha Sarakham / Maha Sarakham
Maha Sarakham, month by month
Maha Sarakham has a measured daily mean on 473 days since 19 January 2025. Its worst month was April 2026, at 110 US AQI (39.3 µg/m³), 138th of 2,941 cities on that month's world ranking. Its cleanest was September 2026, at 49 US AQI (8.8 µg/m³).
Every month since 2025
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
6 months
| Month | Why |
|---|---|
| Jul 2026 | 3 of 31 days measured; a month needs 22. The others: 28 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 | 10 of 31 days measured; a month needs 22. The others: 21 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. |
| Jan 2025 | 5 of 31 days measured; a month needs 22. The others: 8 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.
Maha Sarakham's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| April 2026 | 11039.3 µg/m³ | 138thof 2,941 | – |
| March 2025 | 10938.6 µg/m³ | 176thof 2,862 | Thailand and Laos, March 2025 |
| January 2026 | 10035.4 µg/m³ | 120thof 2,617 | – |
| April 2025 | 9432.1 µg/m³ | 147thof 2,951 | – |
| December 2025 | 9230.9 µg/m³ | 299thof 3,006 | – |
| March 2026 | 9130.8 µg/m³ | 253rdof 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.
Maha Sarakham's worst days
| Day | US AQI | Episode |
|---|---|---|
| 25 Mar 2025 | 16778.6 µg/m³ | Thailand and Laos, March 2025 |
| 26 Mar 2025 | 16473.9 µg/m³ | Thailand and Laos, March 2025 |
| 24 Mar 2025 | 16372.5 µg/m³ | Thailand and Laos, March 2025 |
| 26 Jan 2025 | 15764.5 µg/m³ | Northern Thailand, January 2025 |
| 27 Mar 2025 | 15662.3 µg/m³ | Thailand and Laos, March 2025 |
| 25 Jan 2025 | 15561.7 µg/m³ | Northern Thailand, January 2025 |
| 5 Apr 2026 | 15358.5 µg/m³ | – |
| 24 Jan 2025 | 15357.8 µg/m³ | Northern Thailand, January 2025 |
| 19 Jan 2026 | 15357.7 µg/m³ | – |
| 23 Mar 2025 | 15257.5 µg/m³ | Thailand and Laos, March 2025 |
Daily means, the highest since 19 Jan 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, Maha Sarakham, Thailand, 19 Jan 2025 – 12 Oct 2026. Monitor data from Air4Thai via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/th/maha-sarakham/history (accessed 12 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.
Maha Sarakham now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 23:07 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).