SmogRank / Thailand / Nong Bua Lamphu / Nong Bua Lamphu

Nong Bua Lamphu, month by month

Nong Bua Lamphu has a measured daily mean on 727 days since 1 January 2023. Its worst month was April 2026, at 132 US AQI (47.9 µg/m³), 84th of 2,941 cities on that month's world ranking. Its cleanest was August 2026, at 49 US AQI (8.8 µg/m³).

Every month since 2023

202671 so far256 days measured373rd of 2,798 in the world
Jan82#232Feb74#497Mar83#385Apr132#84May56#600Jun52#741Jul3 daysAug49#1,258Sep52#699Oct57#453
2025too few days for a mean (a year needs 256)222 days measured
Jan4 daysFeb87#228Mar114#149Apr80#241May62#396Jun65#326JulnoneAug6 daysSep57#458Oct10 daysNov12 daysDec66#639
2024too few days for a mean (a year needs 257)185 days measured
Jan72#266Feb120#50Mar19 daysApr124#37May75#120Jun51#911Jul15 daysAug12 daysSep3 daysOct2 daysNov3 daysDec1 day
2023too few days for a mean (a year needs 256)64 days measured
Jan86#75Feb2 daysMar9 daysApr17 daysMay10 daysJun3 daysJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Nong Bua Lamphu'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 Nong Bua Lamphu 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

24 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 20254 of 31 days measured; a month needs 22. The others: 27 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 20243 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Aug 202412 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks.
Jul 202415 of 31 days measured; a month needs 22. The others: 16 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 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
May 202310 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Apr 202317 of 30 days measured; a month needs 21. The others: 2 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks.
Mar 20239 of 31 days measured; a month needs 22. The others: 19 missing from OpenAQ's archive, 3 with under 18 hours of readings or readings that failed our checks.
Feb 20232 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.

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

Nong Bua Lamphu's worst months

MonthUS AQIDays measuredWorld rankEpisode
April 2026 13247.9 µg/m³30 of 3084thof 2,941–
April 2024 12444.7 µg/m³29 of 3037thof 2,520Thailand and Laos, April and May 2024
February 2024 12043.2 µg/m³22 of 2950thof 2,486Thailand, February 2024
Northern Thailand and Laos, February 2024and 1 more
March 2025 11440.7 µg/m³29 of 31149thof 2,862Thailand and Laos, March 2025
February 2025 8728.4 µg/m³26 of 28228thof 2,633Thailand, 1 to 3 February 2025
January 2023 8628.0 µg/m³23 of 3175thof 1,261Northern Thailand and Laos, January and February 2023

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.

Nong Bua Lamphu's worst days

DayUS AQIEpisode
7 Apr 2023 191113.0 µg/m³Northern Thailand and Laos around Bangkok, 5 to 8 April 2023
25 Mar 2025 17488.7 µg/m³Thailand and Laos, March 2025
8 Apr 2023 17387.0 µg/m³Northern Thailand and Laos around Bangkok, 5 to 8 April 2023
24 Mar 2025 17386.8 µg/m³Thailand and Laos, March 2025
26 Mar 2025 17386.4 µg/m³Thailand and Laos, March 2025
23 Mar 2025 17083.0 µg/m³Thailand and Laos, March 2025
31 Jan 2023 16981.1 µg/m³Northern Thailand and Laos, January and February 2023
29 Mar 2025 16879.4 µg/m³Thailand and Laos, March 2025
1 Feb 2023 16676.5 µg/m³Northern Thailand and Laos, January and February 2023
6 Apr 2026 16575.3 µg/m³–

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, Nong Bua Lamphu, Thailand, 1 Jan 2023 – 12 Oct 2026. Monitor data from Air4Thai via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/th/nong-bua-lamphu/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.

Nong Bua Lamphu now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-13 02:07 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).