SmogRank / Thailand / Loei

Air quality in Loei

No new readings from Loei's monitors since 14 Sept. Some networks publish days late. The figures below are from before then; they update when the data returns.

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

Rank, worst first

24 hours–not enough data
7 days–not enough data
30 days–not enough data
This year#359of 2,447, at 3 AQHI+ (26.4 µg/m³), to 14 Sept

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.
Low risk1–3
Moderate risk4–6
High risk7–10
Very high risk10+

Canada's AQHI+ for PM2.5 (1 point per 10 µg/m³), which is defined on hourly values. 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 – 14 Sep 2026, smogrank.com/th/loei (accessed 2 Oct 2026).

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Other cities in Thailand

30-day averages, AQHI+. All of Thailand.

Updated 2026-10-02 06:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the Canada AQHI+ PM2.5 sub-index.