Dayuan, Zhongli, Taoyuan, Taiwan Historical Air Quality Analysis

Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

September Air Quality Analysis
Dayuan, Zhongli, Taoyuan, Taiwan

2021

2022

2023

2024

2025

AQI

Days

Days	2025	2024	2023	2022	2021
Sep. 1	50	56	20		57
Sep. 2	46	51	24	45	61
Sep. 3	52	38	22	26	40
Sep. 4	48	28	22	29	44
Sep. 5	46	18	34	52	36
Sep. 6	52	34	38	54	45
Sep. 7	43	38	30	42	44
Sep. 8	38	28	25	46	41
Sep. 9	41	27	33		34
Sep. 10	43	66	33	40	36
Sep. 11	43	78	38	39	36
Sep. 12	45	52	54	44	24
Sep. 13	45	20	63	39	32
Sep. 14	46	17	67	64	25
Sep. 15	43	26	52	80	40
Sep. 16	44	25	54	70	57
Sep. 17	44	21	61	65	64
Sep. 18	36	24	55	82	46
Sep. 19	46	28	34	80	51
Sep. 20	42	48	49	63	56
Sep. 21	36	25	56	43	40
Sep. 22	35	26	17	34	37
Sep. 23		25	14	38	44
Sep. 24		28	18	50	34
Sep. 25		32	21	32	53
Sep. 26		38	34	27	49
Sep. 27		34	33	23	37
Sep. 28		36	24	35	43
Sep. 29		18	42	47	49
Sep. 30		19	30	65	57

AQI Trends: Highest and Lowest

Highest AQI recorded on

18th Sep 2022

82AQI

Lowest AQI recorded on

23rd Sep 2023

14AQI

Same Day Analysis (22nd September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 35 of Good air quality, showing improvement over 2021 on the same day.

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025
Dayuan, Zhongli, Taoyuan, Taiwan

AQI

Day

Night

5 AM22nd Sep 2025

6 PM

4 AM23rd Sep 2025

Day time

Avg. Highest Time

5AM22nd Sep

43AQI

Avg. Lowest Time

9AM22nd Sep

17AQI

Night time

Avg. Highest Time

1AM23rd Sep

47AQI

Avg. Lowest Time

11PM22nd Sep

32AQI

In the last 24 hours,

Dayuan's AQI reached its highest point of 47 at 1 AM during the Night, while the lowest point, 17, was recorded at 9 AM during the Day between 22nd Sep and 23rd Sep 2025.

Day & Night AQI Trend : Aug - Sep 2025
Dayuan, Zhongli, Taoyuan, Taiwan

AugSep

24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd

Day

Night

30°C27/33°C

30°C27/34°C

29°C26/34°C

28°C26/32°C

29°C25/35°C

30°C26/34°C

29°C26/32°C

28°C26/31°C

29°C26/33°C

29°C26/32°C

29°C26/33°C

30°C26/34°C

28°C26/31°C

29°C25/33°C

29°C26/32°C

29°C26/33°C

28°C25/32°C

28°C26/32°C

29°C26/33°C

29°C26/32°C

29°C26/33°C

30°C26/33°C

30°C26/34°C

30°C26/35°C

29°C26/32°C

28°C25/31°C

28°C25/33°C

28°C26/32°C

5 AM

11 AM

6 PM

11 PM

4 AM

--°C/°C

Day time

Avg. Highest Time

5 AM - 7 AM

47AQI

3 hours / Day

90 hours / Month

Avg. Lowest Time

10 AM

36AQI

1 hours / Day

30 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 5 AM to 7 AM (Avg. 47), while the lowest AQI was between 10 AM to 10 AM (Avg. 36).

Night time

Avg. Highest Time

1 AM - 4 AM

48AQI

4 hours / Day

120 hours / Month

Avg. Lowest Time

7 PM - 11 PM

42AQI

5 hours / Day

150 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 1 AM to 4 AM (Avg. 48), while the lowest AQI was between 7 PM to 11 PM (Avg. 42).

2025 Days Vs Air Quality
Dayuan, Zhongli, Taoyuan, Taiwan

2025

57%

150

43%

114

0.3%

Total number of days with different AQI categories in last 266 days in 2025 (99 days remaining)

Good

150 Days

Moderate

114 Days

Poor

1 Days

Unhealthy

0 Days

Severe

0 Days

Hazardous

0 Days

Under WHO’s Safe Air Quality Limits: 57%

Health Risk Level:

Considerable

In 2025, 57% of 266 days were within WHO’s safe air quality limits, and 43% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.

Annual Air Quality Insights
Dayuan, Zhongli, Taoyuan, Taiwan

AQI levels in 2025

AQI

PM2.5

PM10

SO2

NO2

Sun.Mon.Tue.Wed.Thu.Fri.Sat.

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

62AQI

59AQI

60AQI

63AQI

50AQI

36AQI

40AQI

41AQI

44AQI

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202551AQI

150

114

Highest AQI recorded in

April

63AQI

Lowest AQI recorded in

June

36AQI

202449AQI

219

142

Highest AQI recorded in

March

67AQI

Lowest AQI recorded in

July

31AQI

202348AQI

228

131

Highest AQI recorded in

April

65AQI

Lowest AQI recorded in

July

34AQI

202245AQI

228

Highest AQI recorded in

March

65AQI

Lowest AQI recorded in

July

32AQI

202152AQI

203

151

Highest AQI recorded in

March

77AQI

Lowest AQI recorded in

October

34AQI

202046AQI

181

Highest AQI recorded in

April

65AQI

Lowest AQI recorded in

June

31AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded

2021(Avg.)

52AQI

Least Polluted Year Recorded

2022(Avg.)

45AQI

Dayuan's annual 2025 AQI (51) shows an average percentage change of 6.3% (worsened AQI) compared to previous years: 2020 (46), 2021 (52), 2022 (45), 2023 (48), 2024 (49).


5 AM	43
6 AM	42
7 AM	42
8 AM	22
9 AM	17
10 AM	24
11 AM	20
12 PM	22
1 PM	26
2 PM	26
3 PM	25
4 PM	28
5 PM	33
6 PM	34
7 PM	34
8 PM	37
9 PM	38
10 PM	38
11 PM	32
12 AM	33
1 AM	47
2 AM	47
3 AM	44
4 AM	40

Dayuan, Zhongli, Taoyuan, Taiwan Historical Air Quality Analysis

September Air Quality AnalysisDayuan, Zhongli, Taoyuan, Taiwan

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025Dayuan, Zhongli, Taoyuan, Taiwan

Day & Night AQI Trend : Aug - Sep 2025Dayuan, Zhongli, Taoyuan, Taiwan

2025 Days Vs Air Quality Dayuan, Zhongli, Taoyuan, Taiwan

Annual Air Quality InsightsDayuan, Zhongli, Taoyuan, Taiwan

AQI levels in 2025

No. of days

September Air Quality Analysis
Dayuan, Zhongli, Taoyuan, Taiwan

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025
Dayuan, Zhongli, Taoyuan, Taiwan

Day & Night AQI Trend : Aug - Sep 2025
Dayuan, Zhongli, Taoyuan, Taiwan

2025 Days Vs Air Quality
Dayuan, Zhongli, Taoyuan, Taiwan

Annual Air Quality Insights
Dayuan, Zhongli, Taoyuan, Taiwan