Puzi, Pozi, Chiayi, 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+

October Air Quality Analysis
Puzi, Pozi, Chiayi, Taiwan

2021

2022

2023

2024

2025

AQI

Days

Days	2025	2024	2023	2022	2021
Oct. 1	58	62	61	79	68
Oct. 2	55	44	65	95	75
Oct. 3	56	48	53	78	67
Oct. 4		35	58	60	54
Oct. 5		39	76	72	65
Oct. 6		50	68	73	66
Oct. 7		44		61	62
Oct. 8		46	39	42	66
Oct. 9		49	45	47	78
Oct. 10		55	42	57	71
Oct. 11		64	45	47	67
Oct. 12		62	48	40	44
Oct. 13		64	56	46	35
Oct. 14		66	58	58	42
Oct. 15		60	80	41	56
Oct. 16		56	85	25	42
Oct. 17		69	94	38	43
Oct. 18		66	94	39	40
Oct. 19		58	74	46	44
Oct. 20		42	71	53	62
Oct. 21		35	40	55	54
Oct. 22		55	53	73	33
Oct. 23		66	56	51	54
Oct. 24		48	63	57	57
Oct. 25		40	71	48	47
Oct. 26		54	71	55	61
Oct. 27		51	84	55	51
Oct. 28		38	67	57	60
Oct. 29		45	62	59	57
Oct. 30		46	46	66	53
Oct. 31		34	51	44	58

AQI Trends: Highest and Lowest

Highest AQI recorded on

2nd Oct 2022

95AQI

Lowest AQI recorded on

16th Oct 2022

25AQI

Same Day Analysis (3rd October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 56 of Moderate air quality, showing improvement over 2022 and 2021 on the same day.

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
Puzi, Pozi, Chiayi, Taiwan

AQI

Day

Night

5 AM3rd Oct 2025

6 PM

4 AM4th Oct 2025

Day time

Avg. Highest Time

11AM3rd Oct

67AQI

Avg. Lowest Time

4PM3rd Oct

50AQI

Night time

Avg. Highest Time

1AM4th Oct

90AQI

Avg. Lowest Time

7PM3rd Oct

49AQI

In the last 24 hours,

Puzi's AQI reached its highest point of 90 at 1 AM during the Night, while the lowest point, 49, was recorded at 7 PM during the Night between 3rd Oct and 4th Oct 2025.

Day & Night AQI Trend : Sep - Oct 2025
Puzi, Pozi, Chiayi, Taiwan

SepOct

04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th

Day

Night

31°C29/33°C

31°C28/33°C

31°C29/34°C

31°C29/35°C

30°C27/34°C

31°C28/33°C

31°C29/34°C

31°C29/35°C

31°C29/34°C

31°C29/33°C

30°C28/33°C

31°C27/35°C

31°C29/33°C

31°C29/34°C

29°C27/33°C

29°C27/34°C

29°C27/33°C

30°C27/34°C

29°C27/34°C

29°C27/32°C

29°C26/33°C

30°C27/33°C

30°C28/33°C

31°C28/34°C

30°C29/32°C

30°C28/33°C

30°C28/32°C

30°C28/33°C

5 AM

11 AM

6 PM

11 PM

4 AM

--°C/°C

Day time

Avg. Highest Time

5 AM - 7 AM

54AQI

3 hours / Day

90 hours / Month

Avg. Lowest Time

5 PM

42AQI

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. 54), while the lowest AQI was between 5 PM to 5 PM (Avg. 42).

Night time

Avg. Highest Time

1 AM - 4 AM

53AQI

4 hours / Day

120 hours / Month

Avg. Lowest Time

7 PM

49AQI

1 hours / Day

30 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 1 AM to 4 AM (Avg. 53), while the lowest AQI was between 7 PM to 7 PM (Avg. 49).

2025 Days Vs Air Quality
Puzi, Pozi, Chiayi, Taiwan

2025

49%

134

51%

141

0.3%

Total number of days with different AQI categories in last 277 days in 2025 (88 days remaining)

Good

134 Days

Moderate

141 Days

Poor

1 Days

Unhealthy

0 Days

Severe

0 Days

Hazardous

0 Days

Under WHO’s Safe Air Quality Limits: 49%

Health Risk Level:

Significant

In 2025, 49% of 277 days were within WHO’s safe air quality limits, and 51% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.

Annual Air Quality Insights
Puzi, Pozi, Chiayi, 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.

69AQI

68AQI

65AQI

50AQI

32AQI

41AQI

43AQI

49AQI

56AQI

No. of days

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

202554AQI

134

141

Highest AQI recorded in

January

69AQI

Lowest AQI recorded in

June

32AQI

202458AQI

150

200

Highest AQI recorded in

January

86AQI

Lowest AQI recorded in

July

32AQI

202361AQI

124

217

Highest AQI recorded in

February

84AQI

Lowest AQI recorded in

July

35AQI

202258AQI

117

186

Highest AQI recorded in

March

92AQI

Lowest AQI recorded in

July

23AQI

202162AQI

131

193

Highest AQI recorded in

February

101AQI

Lowest AQI recorded in

June

32AQI

202052AQI

124

135

Highest AQI recorded in

March

73AQI

Lowest AQI recorded in

June

26AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded

2021(Avg.)

62AQI

Least Polluted Year Recorded

2020(Avg.)

52AQI

Puzi's annual 2025 AQI (54) shows an average percentage change of -7.6% (improved AQI) compared to previous years: 2020 (52), 2021 (62), 2022 (58), 2023 (61), 2024 (58).


5 AM	57
6 AM	57
7 AM	62
8 AM	59
9 AM	56
10 AM	61
11 AM	67
12 PM	64
1 PM	64
2 PM	62
3 PM	53
4 PM	50
5 PM	54
6 PM	49
7 PM	49
8 PM	74
9 PM	64
10 PM	63
11 PM	62
12 AM	85
1 AM	90
2 AM	77
3 AM	78
4 AM	78

Puzi, Pozi, Chiayi, Taiwan Historical Air Quality Analysis

October Air Quality AnalysisPuzi, Pozi, Chiayi, Taiwan

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025Puzi, Pozi, Chiayi, Taiwan

Day & Night AQI Trend : Sep - Oct 2025Puzi, Pozi, Chiayi, Taiwan

2025 Days Vs Air Quality Puzi, Pozi, Chiayi, Taiwan

Annual Air Quality InsightsPuzi, Pozi, Chiayi, Taiwan

AQI levels in 2025

No. of days

October Air Quality Analysis
Puzi, Pozi, Chiayi, Taiwan

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
Puzi, Pozi, Chiayi, Taiwan

Day & Night AQI Trend : Sep - Oct 2025
Puzi, Pozi, Chiayi, Taiwan

2025 Days Vs Air Quality
Puzi, Pozi, Chiayi, Taiwan

Annual Air Quality Insights
Puzi, Pozi, Chiayi, Taiwan