SmogRank / Thailand / Loei

Air quality in Loei

Loei, Thailand. PM2.5 from 1 reference monitor, updated hourly. None of them reported in the last 24 hours.

No readings from Loei's monitors in the last two weeks. The history below shows what they measured before.

Rank, worst first

24 hours–not enough data
7 days–not enough data
30 days–not enough data
This year#359of 2,447, at 38 China AQI (26.4 µg/m³)

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: no data2025-11-20: 10.1 µg/m³2025-11-21: 15.9 µg/m³2025-11-22: 20.0 µg/m³2025-11-23: 26.7 µg/m³2025-11-24: 23.8 µg/m³2025-11-25: 24.3 µg/m³2025-11-26: 29.7 µg/m³2025-11-27: 34.5 µg/m³2025-11-28: 34.3 µg/m³2025-11-29: 35.6 µg/m³2025-11-30: 32.4 µg/m³2025-12-01: 25.7 µg/m³2025-12-02: 23.4 µg/m³2025-12-03: 21.3 µg/m³2025-12-04: 23.6 µg/m³2025-12-05: 22.1 µg/m³2025-12-06: 17.7 µg/m³2025-12-07: 17.2 µg/m³2025-12-08: 20.3 µg/m³2025-12-09: 25.2 µg/m³2025-12-10: 28.5 µg/m³2025-12-11: 28.1 µg/m³2025-12-12: 18.8 µg/m³2025-12-13: 11.9 µg/m³2025-12-14: 5.9 µg/m³2025-12-15: 7.7 µg/m³2025-12-16: 11.0 µg/m³2025-12-17: 15.8 µg/m³2025-12-18: 15.0 µg/m³2025-12-19: 17.3 µg/m³2025-12-20: 22.5 µg/m³2025-12-21: 25.6 µg/m³2025-12-22: 22.4 µg/m³2025-12-23: 19.6 µg/m³2025-12-24: 18.6 µg/m³2025-12-25: 19.2 µg/m³2025-12-26: 15.3 µg/m³2025-12-27: 23.7 µg/m³2025-12-28: 39.3 µg/m³2025-12-29: 28.5 µg/m³2025-12-30: 27.9 µg/m³2025-12-31: 33.1 µg/m³2026-01-01: 37.2 µg/m³2026-01-02: 32.2 µg/m³2026-01-03: 24.8 µg/m³2026-01-04: 18.3 µg/m³2026-01-05: no data2026-01-06: no data2026-01-07: 17.7 µg/m³2026-01-08: 26.1 µg/m³2026-01-09: 36.0 µg/m³2026-01-10: 44.0 µg/m³2026-01-11: 41.0 µg/m³2026-01-12: 37.7 µg/m³2026-01-13: 37.6 µg/m³2026-01-14: 50.4 µg/m³2026-01-15: 49.6 µg/m³2026-01-16: 44.1 µg/m³2026-01-17: 45.1 µg/m³2026-01-18: 30.7 µg/m³2026-01-19: 27.1 µg/m³2026-01-20: 28.3 µg/m³2026-01-21: 28.5 µg/m³2026-01-22: 30.3 µg/m³2026-01-23: 23.4 µg/m³2026-01-24: 26.2 µg/m³2026-01-25: 26.9 µg/m³2026-01-26: 29.5 µg/m³2026-01-27: 35.3 µg/m³2026-01-28: 38.7 µg/m³2026-01-29: 38.7 µg/m³2026-01-30: 40.9 µg/m³2026-01-31: 42.2 µg/m³2026-02-01: 47.6 µg/m³2026-02-02: 32.2 µg/m³2026-02-03: 25.3 µg/m³2026-02-04: 21.4 µg/m³2026-02-05: 23.9 µg/m³2026-02-06: 31.4 µg/m³2026-02-07: 33.7 µg/m³2026-02-08: 33.0 µg/m³2026-02-09: 19.3 µg/m³2026-02-10: 17.6 µg/m³2026-02-11: 26.6 µg/m³2026-02-12: 32.4 µg/m³2026-02-13: 34.5 µg/m³2026-02-14: 36.0 µg/m³2026-02-15: 38.1 µg/m³2026-02-16: 38.8 µg/m³2026-02-17: 37.4 µg/m³2026-02-18: 22.8 µg/m³2026-02-19: 14.4 µg/m³2026-02-20: 12.5 µg/m³2026-02-21: 23.8 µg/m³2026-02-22: 32.2 µg/m³2026-02-23: 29.1 µg/m³2026-02-24: 26.1 µg/m³2026-02-25: 17.0 µg/m³2026-02-26: 15.9 µg/m³2026-02-27: 19.9 µg/m³2026-02-28: 20.8 µg/m³2026-03-01: 19.7 µg/m³2026-03-02: 23.5 µg/m³2026-03-03: 29.1 µg/m³2026-03-04: 36.7 µg/m³2026-03-05: 32.1 µg/m³2026-03-06: 15.3 µg/m³2026-03-07: 18.3 µg/m³2026-03-08: 24.9 µg/m³2026-03-09: 28.9 µg/m³2026-03-10: 19.7 µg/m³2026-03-11: 26.7 µg/m³2026-03-12: 25.7 µg/m³2026-03-13: 29.7 µg/m³2026-03-14: 32.9 µg/m³2026-03-15: 22.2 µg/m³2026-03-16: 23.0 µg/m³2026-03-17: 32.1 µg/m³2026-03-18: 37.9 µg/m³2026-03-19: 35.9 µg/m³2026-03-20: 43.3 µg/m³2026-03-21: no data2026-03-22: 34.5 µg/m³2026-03-23: 35.8 µg/m³2026-03-24: 40.0 µg/m³2026-03-25: 42.4 µg/m³2026-03-26: 39.8 µg/m³2026-03-27: 55.4 µg/m³2026-03-28: 55.6 µg/m³2026-03-29: 54.6 µg/m³2026-03-30: 64.5 µg/m³2026-03-31: 65.7 µg/m³2026-04-01: 76.7 µg/m³2026-04-02: 74.9 µg/m³2026-04-03: 68.9 µg/m³2026-04-04: 78.3 µg/m³2026-04-05: 79.4 µg/m³2026-04-06: 87.2 µg/m³2026-04-07: 84.9 µg/m³2026-04-08: 70.1 µg/m³2026-04-09: 62.2 µg/m³2026-04-10: 73.8 µg/m³2026-04-11: 61.6 µg/m³2026-04-12: 64.0 µg/m³2026-04-13: 101.0 µg/m³2026-04-14: 102.0 µg/m³2026-04-15: 81.9 µg/m³2026-04-16: 86.5 µg/m³2026-04-17: 104.0 µg/m³2026-04-18: 101.0 µg/m³2026-04-19: no data2026-04-20: no data2026-04-21: 56.0 µg/m³2026-04-22: 56.7 µg/m³2026-04-23: 66.3 µg/m³2026-04-24: 56.8 µg/m³2026-04-25: 29.7 µg/m³2026-04-26: 31.6 µg/m³2026-04-27: 30.3 µg/m³2026-04-28: 33.6 µg/m³2026-04-29: 28.8 µg/m³2026-04-30: 21.0 µg/m³2026-05-01: 18.9 µg/m³2026-05-02: 14.5 µg/m³2026-05-03: 21.7 µg/m³2026-05-04: 22.7 µg/m³2026-05-05: 25.3 µg/m³2026-05-06: 14.5 µg/m³2026-05-07: 21.9 µg/m³2026-05-08: 22.5 µg/m³2026-05-09: 19.7 µg/m³2026-05-10: 14.5 µg/m³2026-05-11: 18.0 µg/m³2026-05-12: 21.5 µg/m³2026-05-13: 14.8 µg/m³2026-05-14: 14.3 µg/m³2026-05-15: no data2026-05-16: no data2026-05-17: 8.5 µg/m³2026-05-18: 10.1 µg/m³2026-05-19: 7.2 µg/m³2026-05-20: 4.4 µg/m³2026-05-21: 6.0 µg/m³2026-05-22: 9.2 µg/m³2026-05-23: 12.6 µg/m³2026-05-24: 10.9 µg/m³2026-05-25: 8.0 µg/m³2026-05-26: 6.9 µg/m³2026-05-27: 5.9 µg/m³2026-05-28: 7.3 µg/m³2026-05-29: 9.7 µg/m³2026-05-30: 8.2 µg/m³2026-05-31: 10.9 µg/m³2026-06-01: 11.8 µg/m³2026-06-02: 13.1 µg/m³2026-06-03: 11.1 µg/m³2026-06-04: 14.7 µg/m³2026-06-05: 8.0 µg/m³2026-06-06: 6.8 µg/m³2026-06-07: 8.9 µg/m³2026-06-08: 7.7 µg/m³2026-06-09: 9.2 µg/m³2026-06-10: 6.6 µg/m³2026-06-11: 5.1 µg/m³2026-06-12: 4.7 µg/m³2026-06-13: no data2026-06-14: no data2026-06-15: no data2026-06-16: 5.8 µg/m³2026-06-17: 5.8 µg/m³2026-06-18: 6.8 µg/m³2026-06-19: 8.0 µg/m³2026-06-20: 11.1 µg/m³2026-06-21: 9.6 µg/m³2026-06-22: 8.2 µg/m³2026-06-23: 9.7 µg/m³2026-06-24: 11.8 µg/m³2026-06-25: 7.4 µg/m³2026-06-26: 5.9 µg/m³2026-06-27: 7.6 µg/m³2026-06-28: 7.9 µg/m³2026-06-29: 7.9 µg/m³2026-06-30: 7.1 µg/m³2026-07-01: no data2026-07-02: 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: 6.5 µg/m³2026-07-31: 4.3 µg/m³2026-08-01: 4.3 µg/m³2026-08-02: 4.5 µg/m³2026-08-03: 5.0 µg/m³2026-08-04: 5.7 µg/m³2026-08-05: 6.5 µg/m³2026-08-06: 5.6 µg/m³2026-08-07: no data2026-08-08: no data2026-08-09: 5.5 µg/m³2026-08-10: 5.3 µg/m³2026-08-11: 5.9 µg/m³2026-08-12: 7.7 µg/m³2026-08-13: 9.6 µg/m³2026-08-14: 9.0 µg/m³2026-08-15: 8.1 µg/m³2026-08-16: 6.4 µg/m³2026-08-17: 7.7 µg/m³2026-08-18: 13.3 µg/m³2026-08-19: no data2026-08-20: no data2026-08-21: no data2026-08-22: 5.2 µg/m³2026-08-23: 7.0 µg/m³2026-08-24: 8.1 µg/m³2026-08-25: 11.5 µg/m³2026-08-26: 7.0 µg/m³2026-08-27: 5.8 µg/m³2026-08-28: 6.4 µg/m³2026-08-29: 9.3 µg/m³2026-08-30: 11.0 µg/m³2026-08-31: 10.1 µg/m³2026-09-01: 8.0 µg/m³2026-09-02: 7.2 µg/m³2026-09-03: 7.9 µg/m³2026-09-04: 9.3 µg/m³2026-09-05: 8.6 µg/m³2026-09-06: 10.0 µg/m³2026-09-07: 9.9 µg/m³2026-09-08: 7.3 µg/m³2026-09-09: 6.2 µg/m³2026-09-10: 5.9 µg/m³2026-09-11: 8.7 µg/m³2026-09-12: 14.2 µg/m³2026-09-13: 18.4 µg/m³2026-09-14: 16.2 µg/m³2026-09-15: no data2026-09-16: no data2026-09-17: no data2026-09-18: no data2026-09-19: no data2026-09-20: no data2026-09-21: no data2026-09-22: no data2026-09-23: no data2026-09-24: no data2026-09-25: no data2026-09-26: no data2026-09-27: no data2026-09-28: no data2026-09-29: no data2026-09-30: no data2026-10-01: no data
160 of 255 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Excellent0–50
Good51–100
Lightly polluted101–150
Moderately polluted151–200
Heavily polluted201–300
Severely polluted301+

China's Air Quality Index (HJ 633-2012), PM2.5 individual index. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Hour by hour

No hourly readings in the last few days. The chart returns when the monitors' data arrives.

Where it stood each day

Top 10Top 100#1#10#100#1,000#2,796DecJanFebMarAprMayJunJulAugSep#386
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: 34.1 µg/m³JanFeb 2025: 31.7 µg/m³Feb 2026: 27.3 µg/m³FebMar 2025: 51.6 µg/m³Mar 2026: 34.9 µg/m³MarApr 2025: 27.4 µg/m³Apr 2026: 66.8 µg/m³AprMay 2025: 8.4 µg/m³May 2026: 13.5 µg/m³MayJun 2025: 8.5 µg/m³Jun 2026: 8.5 µg/m³JunJulAug 2026: 7.4 µg/m³AugSep 2025: 6.2 µg/m³Sep 2026: 9.8 µg/m³SepOctNov 2025: 26.1 µg/m³NovDec 2025: 21.0 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

Monitors

StationOperatorType
60th Anniversary Queen Sirikit Public Park, LoeiPermission 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, Loei, Thailand, 20 Nov 2025 – 1 Oct 2026, smogrank.com/th/loei (accessed 2 Oct 2026).

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Other cities in Thailand

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

Updated 2026-10-02 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the China AQI PM2.5 sub-index.