SmogRank / Taiwan / Taiwan

Air quality in Douliu

Taiwan, Taiwan. PM2.5 from 1 reference monitor, updated hourly.

12.3 µg/m³
Moderate

Mean for 30 Sept, the most recent day with readings, 0.8× the WHO 24-hour guideline. No hourly readings have reached us since; some networks publish days late.

Rank

24 h
–
not enough data
7 days
#235
of 2,327 · 15.3 µg/m³
30 days
#247
of 2,325 · 14.4 µg/m³
Year
#269
of 2,160 · 16.8 µg/m³

Why it ranks here

Seasonal. Over the past year its worst months were January, February, March, April, December, averaging up to 26.0 µg/m³ against 8.6 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

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

Hour by hour

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

Every day for a year

SepNovDecJanFebMarAprMayJunJulAugSepMonWedFri2025-09-29: 14.4 µg/m³2025-09-30: 16.6 µg/m³2025-10-01: 19.3 µg/m³2025-10-02: 15.2 µg/m³2025-10-03: 19.3 µg/m³2025-10-04: 21.6 µg/m³2025-10-05: 15.1 µg/m³2025-10-06: 17.9 µg/m³2025-10-07: 22.0 µg/m³2025-10-08: 21.3 µg/m³2025-10-09: 22.4 µg/m³2025-10-10: 18.3 µg/m³2025-10-11: no data2025-10-12: no data2025-10-13: no data2025-10-14: no data2025-10-15: no data2025-10-16: no data2025-10-17: no data2025-10-18: no data2025-10-19: no data2025-10-20: no data2025-10-21: no data2025-10-22: no data2025-10-23: no data2025-10-24: no data2025-10-25: no data2025-10-26: no data2025-10-27: no data2025-10-28: no data2025-10-29: no data2025-10-30: no data2025-10-31: no data2025-11-01: 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: 15.3 µg/m³2025-11-20: 19.0 µg/m³2025-11-21: 21.3 µg/m³2025-11-22: 26.0 µg/m³2025-11-23: 24.4 µg/m³2025-11-24: 27.7 µg/m³2025-11-25: 29.0 µg/m³2025-11-26: 31.0 µg/m³2025-11-27: 18.7 µg/m³2025-11-28: 29.5 µg/m³2025-11-29: 36.4 µg/m³2025-11-30: 33.5 µg/m³2025-12-01: 28.0 µg/m³2025-12-02: 30.7 µg/m³2025-12-03: 26.0 µg/m³2025-12-04: 25.3 µg/m³2025-12-05: 27.8 µg/m³2025-12-06: 24.1 µg/m³2025-12-07: 34.5 µg/m³2025-12-08: 28.5 µg/m³2025-12-09: 24.7 µg/m³2025-12-10: 22.0 µg/m³2025-12-11: 19.6 µg/m³2025-12-12: 25.9 µg/m³2025-12-13: 22.5 µg/m³2025-12-14: 19.0 µg/m³2025-12-15: 22.6 µg/m³2025-12-16: 30.0 µg/m³2025-12-17: 22.5 µg/m³2025-12-18: 25.8 µg/m³2025-12-19: 35.1 µg/m³2025-12-20: 35.8 µg/m³2025-12-21: 30.0 µg/m³2025-12-22: 17.4 µg/m³2025-12-23: 27.5 µg/m³2025-12-24: 29.5 µg/m³2025-12-25: 17.5 µg/m³2025-12-26: 17.4 µg/m³2025-12-27: 19.7 µg/m³2025-12-28: no data2025-12-29: 18.7 µg/m³2025-12-30: 18.1 µg/m³2025-12-31: 13.9 µg/m³2026-01-01: 12.3 µg/m³2026-01-02: 12.3 µg/m³2026-01-03: 21.0 µg/m³2026-01-04: 25.5 µg/m³2026-01-05: 29.1 µg/m³2026-01-06: 25.8 µg/m³2026-01-07: 26.8 µg/m³2026-01-08: 30.5 µg/m³2026-01-09: 26.5 µg/m³2026-01-10: 26.9 µg/m³2026-01-11: 24.5 µg/m³2026-01-12: 29.4 µg/m³2026-01-13: 33.7 µg/m³2026-01-14: 34.5 µg/m³2026-01-15: 43.3 µg/m³2026-01-16: 31.6 µg/m³2026-01-17: 35.8 µg/m³2026-01-18: 30.0 µg/m³2026-01-19: 30.7 µg/m³2026-01-20: 15.8 µg/m³2026-01-21: 9.2 µg/m³2026-01-22: 9.8 µg/m³2026-01-23: 13.7 µg/m³2026-01-24: 20.8 µg/m³2026-01-25: 22.2 µg/m³2026-01-26: 34.3 µg/m³2026-01-27: 30.8 µg/m³2026-01-28: 14.8 µg/m³2026-01-29: 20.8 µg/m³2026-01-30: 24.3 µg/m³2026-01-31: 22.3 µg/m³2026-02-01: 9.8 µg/m³2026-02-02: 18.4 µg/m³2026-02-03: 26.5 µg/m³2026-02-04: 40.8 µg/m³2026-02-05: 38.8 µg/m³2026-02-06: 36.7 µg/m³2026-02-07: 16.0 µg/m³2026-02-08: 21.5 µg/m³2026-02-09: 24.9 µg/m³2026-02-10: 27.7 µg/m³2026-02-11: 23.7 µg/m³2026-02-12: 29.5 µg/m³2026-02-13: 38.0 µg/m³2026-02-14: 28.8 µg/m³2026-02-15: 19.6 µg/m³2026-02-16: 36.9 µg/m³2026-02-17: 16.0 µg/m³2026-02-18: 15.3 µg/m³2026-02-19: 24.2 µg/m³2026-02-20: 28.3 µg/m³2026-02-21: 37.2 µg/m³2026-02-22: 28.2 µg/m³2026-02-23: 32.1 µg/m³2026-02-24: 28.0 µg/m³2026-02-25: 24.3 µg/m³2026-02-26: 21.8 µg/m³2026-02-27: 17.5 µg/m³2026-02-28: 18.4 µg/m³2026-03-01: 23.3 µg/m³2026-03-02: 18.8 µg/m³2026-03-03: 13.1 µg/m³2026-03-04: 11.7 µg/m³2026-03-05: 21.4 µg/m³2026-03-06: 12.6 µg/m³2026-03-07: 18.0 µg/m³2026-03-08: 26.7 µg/m³2026-03-09: 16.5 µg/m³2026-03-10: 15.5 µg/m³2026-03-11: 17.4 µg/m³2026-03-12: 16.7 µg/m³2026-03-13: 20.9 µg/m³2026-03-14: 25.6 µg/m³2026-03-15: 27.3 µg/m³2026-03-16: 25.0 µg/m³2026-03-17: 25.6 µg/m³2026-03-18: 20.8 µg/m³2026-03-19: 23.9 µg/m³2026-03-20: 27.8 µg/m³2026-03-21: 23.4 µg/m³2026-03-22: 29.1 µg/m³2026-03-23: 34.1 µg/m³2026-03-24: 37.7 µg/m³2026-03-25: 27.3 µg/m³2026-03-26: 28.0 µg/m³2026-03-27: 20.7 µg/m³2026-03-28: 33.2 µg/m³2026-03-29: 33.6 µg/m³2026-03-30: 25.3 µg/m³2026-03-31: 16.4 µg/m³2026-04-01: 24.4 µg/m³2026-04-02: 22.0 µg/m³2026-04-03: 18.2 µg/m³2026-04-04: 16.6 µg/m³2026-04-05: 15.8 µg/m³2026-04-06: 16.8 µg/m³2026-04-07: 12.0 µg/m³2026-04-08: 17.4 µg/m³2026-04-09: 27.2 µg/m³2026-04-10: 19.3 µg/m³2026-04-11: 18.7 µg/m³2026-04-12: 21.4 µg/m³2026-04-13: 19.0 µg/m³2026-04-14: 12.5 µg/m³2026-04-15: 14.2 µg/m³2026-04-16: 20.0 µg/m³2026-04-17: 30.3 µg/m³2026-04-18: 34.9 µg/m³2026-04-19: 29.3 µg/m³2026-04-20: 28.4 µg/m³2026-04-21: 28.2 µg/m³2026-04-22: 23.3 µg/m³2026-04-23: 21.5 µg/m³2026-04-24: 20.1 µg/m³2026-04-25: 21.9 µg/m³2026-04-26: 20.9 µg/m³2026-04-27: 21.0 µg/m³2026-04-28: 21.0 µg/m³2026-04-29: 23.1 µg/m³2026-04-30: 12.5 µg/m³2026-05-01: 20.0 µg/m³2026-05-02: 23.5 µg/m³2026-05-03: 15.8 µg/m³2026-05-04: 20.3 µg/m³2026-05-05: 27.0 µg/m³2026-05-06: 7.1 µg/m³2026-05-07: 16.5 µg/m³2026-05-08: 16.5 µg/m³2026-05-09: 13.9 µg/m³2026-05-10: 13.3 µg/m³2026-05-11: 17.2 µg/m³2026-05-12: 20.6 µg/m³2026-05-13: 21.1 µg/m³2026-05-14: 18.8 µg/m³2026-05-15: 10.0 µg/m³2026-05-16: 10.5 µg/m³2026-05-17: 10.8 µg/m³2026-05-18: 11.1 µg/m³2026-05-19: 11.6 µg/m³2026-05-20: 11.0 µg/m³2026-05-21: no data2026-05-22: no data2026-05-23: no data2026-05-24: no data2026-05-25: no data2026-05-26: 10.7 µg/m³2026-05-27: 10.3 µg/m³2026-05-28: 10.8 µg/m³2026-05-29: 19.1 µg/m³2026-05-30: 23.7 µg/m³2026-05-31: 20.0 µg/m³2026-06-01: 25.2 µg/m³2026-06-02: 23.3 µg/m³2026-06-03: 15.5 µg/m³2026-06-04: 5.5 µg/m³2026-06-05: 7.5 µg/m³2026-06-06: 14.2 µg/m³2026-06-07: 7.6 µg/m³2026-06-08: 2.7 µg/m³2026-06-09: 2.6 µg/m³2026-06-10: 6.8 µg/m³2026-06-11: 11.3 µg/m³2026-06-12: 11.5 µg/m³2026-06-13: 9.4 µg/m³2026-06-14: 6.1 µg/m³2026-06-15: 3.9 µg/m³2026-06-16: 3.4 µg/m³2026-06-17: 4.2 µg/m³2026-06-18: 5.2 µg/m³2026-06-19: 12.1 µg/m³2026-06-20: 14.3 µg/m³2026-06-21: 10.1 µg/m³2026-06-22: 8.7 µg/m³2026-06-23: 8.2 µg/m³2026-06-24: 10.5 µg/m³2026-06-25: 7.7 µg/m³2026-06-26: 3.9 µg/m³2026-06-27: 4.0 µg/m³2026-06-28: 4.3 µg/m³2026-06-29: 8.4 µg/m³2026-06-30: 8.3 µg/m³2026-07-01: 8.8 µg/m³2026-07-02: 12.6 µg/m³2026-07-03: 11.8 µg/m³2026-07-04: 7.0 µg/m³2026-07-05: 4.7 µg/m³2026-07-06: 5.1 µg/m³2026-07-07: 4.5 µg/m³2026-07-08: 8.7 µg/m³2026-07-09: 13.8 µg/m³2026-07-10: 12.7 µg/m³2026-07-11: 6.5 µg/m³2026-07-12: 7.1 µg/m³2026-07-13: 5.6 µg/m³2026-07-14: 4.8 µg/m³2026-07-15: 5.2 µg/m³2026-07-16: 6.6 µg/m³2026-07-17: 5.0 µg/m³2026-07-18: 5.1 µg/m³2026-07-19: 7.2 µg/m³2026-07-20: 7.3 µg/m³2026-07-21: 11.1 µg/m³2026-07-22: 13.7 µg/m³2026-07-23: 15.5 µg/m³2026-07-24: 20.0 µg/m³2026-07-25: 17.1 µg/m³2026-07-26: 8.8 µg/m³2026-07-27: 6.4 µg/m³2026-07-28: 5.4 µg/m³2026-07-29: 8.9 µg/m³2026-07-30: 9.0 µg/m³2026-07-31: 7.4 µg/m³2026-08-01: 11.3 µg/m³2026-08-02: 9.5 µg/m³2026-08-03: 8.8 µg/m³2026-08-04: 12.1 µg/m³2026-08-05: 10.7 µg/m³2026-08-06: 12.8 µg/m³2026-08-07: 20.0 µg/m³2026-08-08: 12.8 µg/m³2026-08-09: 12.3 µg/m³2026-08-10: 9.0 µg/m³2026-08-11: 16.5 µg/m³2026-08-12: 17.3 µg/m³2026-08-13: 15.4 µg/m³2026-08-14: 7.0 µg/m³2026-08-15: 5.8 µg/m³2026-08-16: 4.8 µg/m³2026-08-17: 8.4 µg/m³2026-08-18: 12.6 µg/m³2026-08-19: 9.7 µg/m³2026-08-20: 2.7 µg/m³2026-08-21: 1.5 µg/m³2026-08-22: 1.8 µg/m³2026-08-23: 2.5 µg/m³2026-08-24: 1.7 µg/m³2026-08-25: 3.5 µg/m³2026-08-26: 8.0 µg/m³2026-08-27: 9.4 µg/m³2026-08-28: 7.1 µg/m³2026-08-29: 4.1 µg/m³2026-08-30: 3.3 µg/m³2026-08-31: 3.7 µg/m³2026-09-01: 1.6 µg/m³2026-09-02: 4.1 µg/m³2026-09-03: 3.0 µg/m³2026-09-04: 6.1 µg/m³2026-09-05: 8.0 µg/m³2026-09-06: 7.0 µg/m³2026-09-07: 14.3 µg/m³2026-09-08: 15.7 µg/m³2026-09-09: 16.1 µg/m³2026-09-10: 15.5 µg/m³2026-09-11: 17.3 µg/m³2026-09-12: 21.2 µg/m³2026-09-13: 17.2 µg/m³2026-09-14: 12.7 µg/m³2026-09-15: 15.3 µg/m³2026-09-16: 15.9 µg/m³2026-09-17: 17.0 µg/m³2026-09-18: 20.6 µg/m³2026-09-19: 19.2 µg/m³2026-09-20: 21.5 µg/m³2026-09-21: 19.2 µg/m³2026-09-22: 16.5 µg/m³2026-09-23: 18.8 µg/m³2026-09-24: 22.0 µg/m³2026-09-25: 24.2 µg/m³2026-09-26: 17.5 µg/m³2026-09-27: 13.5 µg/m³2026-09-28: 8.8 µg/m³2026-09-29: 8.5 µg/m³2026-09-30: 12.3 µg/m³
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

199 of 320 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#2366OctNovDecJanFebMarAprMayJunJulAugSep

Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15Jan 2025: 25.8 µg/m³Jan 2026: 24.8 µg/m³JanFeb 2025: 23.8 µg/m³Feb 2026: 26.0 µg/m³FebMar 2025: 21.5 µg/m³Mar 2026: 23.1 µg/m³MarApr 2025: 21.5 µg/m³Apr 2026: 21.1 µg/m³AprMay 2025: 12.4 µg/m³May 2026: 15.8 µg/m³MayJun 2025: 7.4 µg/m³Jun 2026: 8.9 µg/m³JunJul 2026: 8.8 µg/m³JulAug 2026: 8.6 µg/m³AugSep 2025: 13.1 µg/m³Sep 2026: 14.4 µg/m³SepOct 2025: 19.2 µg/m³OctNov 2025: 26.0 µg/m³NovDec 2025: 24.7 µg/m³Dec

Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 15.3 µg/m³15.320252025: 17.5 µg/m³17.520242024: 15.4 µg/m³15.4

Mean PM2.5 for 24 Sept to 30 Sept in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
雲林縣 - 斗六OGDL-Taiwan 1.0TaiwanReference

The city's value is the median of its reference monitors each hour; 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.

Other cities in Taiwan

Jincheng 15.0Zhushan 14.7Erlin 14.6Yuanlin 14.5Beigang 14.2Erlun 13.5Nantou 13.4Tainan 13.3Fengshan 13.3Taichung 13.1Puli 13.1Chiayi City 12.5

30-day averages, µg/m³. All of Taiwan →

Updated 2026-10-01 07:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.