SmogRank / Thailand / Chaiyaphum

Air quality in Chaiyaphum

Chaiyaphum, Thailand. PM2.5 from 1 reference monitor, updated hourly.

43US AQI
Good

Latest hour (07:00 UTC), 0.5× the WHO 24-hour guideline. PM2.5 7.7 µg/m³.

Rank, worst first

24 hours–not enough data
7 days#1,630of 2,594, at 37 US AQI (6.7 µg/m³)
30 days#797of 2,622, at 49 US AQI (8.9 µg/m³)
This year#473of 2,447, at 73 US AQI (20.7 µg/m³)

Why it ranks here

Cleaner than usual this week. The last 7 days averaged 6.7 µg/m³, well below its typical 17.8; rain or wind often clears the air for a while.
Seasonal. Over the past year its worst months were April, averaging up to 42.2 µg/m³ against 8.8 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on Chaiyaphum's own measurements; causes are the usual kinds for a pattern like this, not a confirmed source.

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: no data2025-11-02: no data2025-11-03: no data2025-11-04: no data2025-11-05: no data2025-11-06: no data2025-11-07: no data2025-11-08: no data2025-11-09: no data2025-11-10: no data2025-11-11: no data2025-11-12: no data2025-11-13: no data2025-11-14: no data2025-11-15: no data2025-11-16: no data2025-11-17: no data2025-11-18: no data2025-11-19: 16.2 µg/m³2025-11-20: 9.1 µg/m³2025-11-21: 14.4 µg/m³2025-11-22: 17.8 µg/m³2025-11-23: 19.1 µg/m³2025-11-24: 18.3 µg/m³2025-11-25: 21.1 µg/m³2025-11-26: 32.7 µg/m³2025-11-27: 30.8 µg/m³2025-11-28: 25.8 µg/m³2025-11-29: 29.5 µg/m³2025-11-30: 29.4 µg/m³2025-12-01: 31.6 µg/m³2025-12-02: 26.2 µg/m³2025-12-03: 24.2 µg/m³2025-12-04: 20.4 µg/m³2025-12-05: 17.2 µg/m³2025-12-06: 16.1 µg/m³2025-12-07: 15.8 µg/m³2025-12-08: 22.0 µg/m³2025-12-09: 26.3 µg/m³2025-12-10: 27.8 µg/m³2025-12-11: 21.0 µg/m³2025-12-12: 18.9 µg/m³2025-12-13: 17.3 µg/m³2025-12-14: 12.7 µg/m³2025-12-15: 9.8 µg/m³2025-12-16: 14.7 µg/m³2025-12-17: 14.4 µg/m³2025-12-18: 12.8 µg/m³2025-12-19: 21.1 µg/m³2025-12-20: 29.7 µg/m³2025-12-21: 23.2 µg/m³2025-12-22: 20.7 µg/m³2025-12-23: 18.3 µg/m³2025-12-24: 23.8 µg/m³2025-12-25: 22.4 µg/m³2025-12-26: 18.0 µg/m³2025-12-27: 18.4 µg/m³2025-12-28: 24.1 µg/m³2025-12-29: 28.7 µg/m³2025-12-30: 29.7 µg/m³2025-12-31: 27.8 µg/m³2026-01-01: 35.1 µg/m³2026-01-02: 24.4 µg/m³2026-01-03: 16.9 µg/m³2026-01-04: 15.6 µg/m³2026-01-05: 18.3 µg/m³2026-01-06: 16.5 µg/m³2026-01-07: 16.3 µg/m³2026-01-08: 17.8 µg/m³2026-01-09: 24.5 µg/m³2026-01-10: 30.7 µg/m³2026-01-11: 28.8 µg/m³2026-01-12: 28.4 µg/m³2026-01-13: 36.5 µg/m³2026-01-14: 41.6 µg/m³2026-01-15: 42.4 µg/m³2026-01-16: 44.5 µg/m³2026-01-17: 49.5 µg/m³2026-01-18: 46.8 µg/m³2026-01-19: 45.5 µg/m³2026-01-20: 43.1 µg/m³2026-01-21: 39.2 µg/m³2026-01-22: 24.4 µg/m³2026-01-23: 18.7 µg/m³2026-01-24: 16.9 µg/m³2026-01-25: 20.1 µg/m³2026-01-26: 29.2 µg/m³2026-01-27: 31.3 µg/m³2026-01-28: 22.1 µg/m³2026-01-29: 24.2 µg/m³2026-01-30: 30.8 µg/m³2026-01-31: 33.2 µg/m³2026-02-01: 27.1 µg/m³2026-02-02: 20.2 µg/m³2026-02-03: 13.0 µg/m³2026-02-04: 14.7 µg/m³2026-02-05: 21.7 µg/m³2026-02-06: 24.3 µg/m³2026-02-07: 26.0 µg/m³2026-02-08: 27.6 µg/m³2026-02-09: 19.7 µg/m³2026-02-10: 25.9 µg/m³2026-02-11: 25.2 µg/m³2026-02-12: 23.9 µg/m³2026-02-13: 25.5 µg/m³2026-02-14: 27.7 µg/m³2026-02-15: 32.9 µg/m³2026-02-16: 37.2 µg/m³2026-02-17: 36.9 µg/m³2026-02-18: 20.3 µg/m³2026-02-19: 14.3 µg/m³2026-02-20: 14.2 µg/m³2026-02-21: 16.7 µg/m³2026-02-22: 31.0 µg/m³2026-02-23: 30.0 µg/m³2026-02-24: 33.4 µg/m³2026-02-25: 19.8 µg/m³2026-02-26: 25.1 µg/m³2026-02-27: 24.0 µg/m³2026-02-28: 20.1 µg/m³2026-03-01: 24.1 µg/m³2026-03-02: 27.1 µg/m³2026-03-03: 36.5 µg/m³2026-03-04: 47.4 µg/m³2026-03-05: 37.2 µg/m³2026-03-06: 16.5 µg/m³2026-03-07: 13.8 µg/m³2026-03-08: 20.0 µg/m³2026-03-09: 24.9 µg/m³2026-03-10: 15.5 µg/m³2026-03-11: 14.2 µg/m³2026-03-12: 19.6 µg/m³2026-03-13: 19.8 µg/m³2026-03-14: 21.5 µg/m³2026-03-15: 18.3 µg/m³2026-03-16: 18.8 µg/m³2026-03-17: 22.5 µg/m³2026-03-18: 33.0 µg/m³2026-03-19: 29.2 µg/m³2026-03-20: 23.0 µg/m³2026-03-21: 23.6 µg/m³2026-03-22: 39.5 µg/m³2026-03-23: 27.7 µg/m³2026-03-24: 37.4 µg/m³2026-03-25: 34.5 µg/m³2026-03-26: 42.0 µg/m³2026-03-27: 45.7 µg/m³2026-03-28: 46.0 µg/m³2026-03-29: 47.3 µg/m³2026-03-30: 40.4 µg/m³2026-03-31: no data2026-04-01: 43.7 µg/m³2026-04-02: 47.7 µg/m³2026-04-03: 39.5 µg/m³2026-04-04: 43.4 µg/m³2026-04-05: 52.4 µg/m³2026-04-06: 50.7 µg/m³2026-04-07: 56.1 µg/m³2026-04-08: 66.4 µg/m³2026-04-09: 66.4 µg/m³2026-04-10: 55.6 µg/m³2026-04-11: 52.0 µg/m³2026-04-12: 57.2 µg/m³2026-04-13: 49.3 µg/m³2026-04-14: 36.4 µg/m³2026-04-15: 42.8 µg/m³2026-04-16: 55.9 µg/m³2026-04-17: 48.7 µg/m³2026-04-18: 35.1 µg/m³2026-04-19: 32.3 µg/m³2026-04-20: 28.5 µg/m³2026-04-21: 31.0 µg/m³2026-04-22: 46.6 µg/m³2026-04-23: 48.2 µg/m³2026-04-24: 31.0 µg/m³2026-04-25: 21.3 µg/m³2026-04-26: 26.0 µg/m³2026-04-27: 33.3 µg/m³2026-04-28: 25.0 µg/m³2026-04-29: 23.2 µg/m³2026-04-30: 21.7 µg/m³2026-05-01: 12.9 µg/m³2026-05-02: 11.0 µg/m³2026-05-03: 14.4 µg/m³2026-05-04: 15.3 µg/m³2026-05-05: 17.9 µg/m³2026-05-06: 18.7 µg/m³2026-05-07: 23.3 µg/m³2026-05-08: 20.0 µg/m³2026-05-09: 17.3 µg/m³2026-05-10: 20.6 µg/m³2026-05-11: 20.8 µg/m³2026-05-12: 20.7 µg/m³2026-05-13: no data2026-05-14: no data2026-05-15: 11.1 µg/m³2026-05-16: 10.0 µg/m³2026-05-17: 11.2 µg/m³2026-05-18: 9.9 µg/m³2026-05-19: 8.0 µg/m³2026-05-20: 7.2 µg/m³2026-05-21: 10.3 µg/m³2026-05-22: 14.1 µg/m³2026-05-23: 15.3 µg/m³2026-05-24: 15.3 µg/m³2026-05-25: 11.7 µg/m³2026-05-26: 10.8 µg/m³2026-05-27: 13.3 µg/m³2026-05-28: 12.3 µg/m³2026-05-29: 12.1 µg/m³2026-05-30: 10.4 µg/m³2026-05-31: 10.2 µg/m³2026-06-01: 11.7 µg/m³2026-06-02: 11.1 µg/m³2026-06-03: 10.8 µg/m³2026-06-04: 13.6 µg/m³2026-06-05: 8.8 µg/m³2026-06-06: 9.2 µg/m³2026-06-07: 8.8 µg/m³2026-06-08: 10.8 µg/m³2026-06-09: 10.2 µg/m³2026-06-10: 9.1 µg/m³2026-06-11: 9.2 µg/m³2026-06-12: 8.0 µg/m³2026-06-13: no data2026-06-14: 8.8 µg/m³2026-06-15: 7.3 µg/m³2026-06-16: 9.5 µg/m³2026-06-17: 10.3 µg/m³2026-06-18: 11.2 µg/m³2026-06-19: 8.7 µg/m³2026-06-20: 9.3 µg/m³2026-06-21: 10.8 µg/m³2026-06-22: 9.8 µg/m³2026-06-23: 10.1 µg/m³2026-06-24: 14.0 µg/m³2026-06-25: 9.0 µg/m³2026-06-26: 8.3 µg/m³2026-06-27: 9.0 µg/m³2026-06-28: 8.4 µg/m³2026-06-29: 8.5 µg/m³2026-06-30: 9.5 µg/m³2026-07-01: 8.8 µg/m³2026-07-02: no data2026-07-03: no data2026-07-04: no data2026-07-05: no data2026-07-06: no data2026-07-07: no data2026-07-08: no data2026-07-09: no data2026-07-10: no data2026-07-11: no data2026-07-12: no data2026-07-13: no data2026-07-14: no data2026-07-15: no data2026-07-16: no data2026-07-17: no data2026-07-18: no data2026-07-19: no data2026-07-20: no data2026-07-21: no data2026-07-22: no data2026-07-23: no data2026-07-24: no data2026-07-25: no data2026-07-26: no data2026-07-27: no data2026-07-28: no data2026-07-29: no data2026-07-30: 10.2 µg/m³2026-07-31: 9.2 µg/m³2026-08-01: 7.8 µg/m³2026-08-02: 6.6 µg/m³2026-08-03: 9.1 µg/m³2026-08-04: 10.0 µg/m³2026-08-05: 8.1 µg/m³2026-08-06: 5.9 µg/m³2026-08-07: 6.2 µg/m³2026-08-08: 5.6 µg/m³2026-08-09: 8.2 µg/m³2026-08-10: 8.5 µg/m³2026-08-11: 10.2 µg/m³2026-08-12: 11.9 µg/m³2026-08-13: 10.7 µg/m³2026-08-14: 8.7 µg/m³2026-08-15: 8.4 µg/m³2026-08-16: 11.0 µg/m³2026-08-17: 11.2 µg/m³2026-08-18: 11.1 µg/m³2026-08-19: 10.5 µg/m³2026-08-20: 7.1 µg/m³2026-08-21: 6.6 µg/m³2026-08-22: 6.6 µg/m³2026-08-23: 7.4 µg/m³2026-08-24: 8.5 µg/m³2026-08-25: 11.6 µg/m³2026-08-26: 14.3 µg/m³2026-08-27: 8.8 µg/m³2026-08-28: 8.7 µg/m³2026-08-29: 8.8 µg/m³2026-08-30: 8.4 µg/m³2026-08-31: 6.8 µg/m³2026-09-01: 8.9 µg/m³2026-09-02: 7.5 µg/m³2026-09-03: 9.3 µg/m³2026-09-04: 12.2 µg/m³2026-09-05: 12.2 µg/m³2026-09-06: 13.2 µg/m³2026-09-07: 12.7 µg/m³2026-09-08: 8.7 µg/m³2026-09-09: no data2026-09-10: no data2026-09-11: 7.9 µg/m³2026-09-12: 13.0 µg/m³2026-09-13: 17.6 µg/m³2026-09-14: 13.5 µg/m³2026-09-15: 8.2 µg/m³2026-09-16: 7.3 µg/m³2026-09-17: 8.4 µg/m³2026-09-18: 7.8 µg/m³2026-09-19: 6.3 µg/m³2026-09-20: 6.7 µg/m³2026-09-21: 3.6 µg/m³2026-09-22: 5.2 µg/m³2026-09-23: 14.2 µg/m³2026-09-24: 7.6 µg/m³2026-09-25: 5.4 µg/m³2026-09-26: 3.9 µg/m³2026-09-27: 3.7 µg/m³2026-09-28: 4.2 µg/m³2026-09-29: 9.0 µg/m³2026-09-30: 9.5 µg/m³2026-10-01: 11.3 µg/m³
161 of 292 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
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

Last 4 days, hour by hour

15302026-10-02 00:00 UTC: 8.9 µg/m³2026-10-02 01:00 UTC: 8.6 µg/m³2026-10-02 02:00 UTC: 8.3 µg/m³2026-10-02 03:00 UTC: 8.1 µg/m³2026-10-02 04:00 UTC: 8.0 µg/m³2026-10-02 05:00 UTC: 8.0 µg/m³2026-10-02 06:00 UTC: 7.9 µg/m³2026-10-02 07:00 UTC: 7.7 µg/m³Sep 29Sep 30Oct 1Oct 2
Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Where it stood each day

Top 10Top 100#1#10#100#1,000#2,835NovDecJanFebMarAprMayJunJulAugSep#875
Its rank on each day's world board, #1 being the most polluted city that day. The scale is logarithmic: each step down is ten times as many cities. See it among every city.

2026 against 2025, month by month

15Jan 2026: 29.5 µg/m³JanFeb 2025: 27.2 µg/m³Feb 2026: 24.2 µg/m³FebMar 2025: 38.7 µg/m³Mar 2026: 28.9 µg/m³MarApr 2025: 26.4 µg/m³Apr 2026: 42.2 µg/m³AprMay 2025: 10.3 µg/m³May 2026: 14.0 µg/m³MayJun 2025: 10.1 µg/m³Jun 2026: 9.8 µg/m³JunJulAug 2026: 8.8 µg/m³AugSep 2025: 7.9 µg/m³Sep 2026: 8.8 µg/m³SepOct 2025: 10.8 µg/m³OctNov 2025: 22.0 µg/m³NovDec 2025: 21.1 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 6.7 µg/m³6.720252025: 7.4 µg/m³7.4
Mean PM2.5 for 25 Sept to 1 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
Mueang Chaiyaphum Municipality StadiumPermission requested (Thailand PCD, Air4Thai, 2026-10-01)Air4ThaiReference

The city's value is the median of its reference monitors each hour, when at least a third of them report (three are always enough); low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Use this page

SmogRank, PM2.5 daily means, Chaiyaphum, Thailand, 2 Oct 2025 – 1 Oct 2026, smogrank.com/th/chaiyaphum (accessed 2 Oct 2026).

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Other cities in Thailand

30-day averages, US AQI. All of Thailand.

Updated 2026-10-02 08:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.