Zhoushan, Zhejiang, China 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+

July Air Quality Analysis
Zhoushan, Zhejiang, China

2021

2022

2023

2024

2025

AQI

Days

Days	2025	2024	2023	2022	2021
Jul. 1	41	48	50	25	47
Jul. 2	45	47	50	24	50
Jul. 3		51	54	32	53
Jul. 4		47	64	36	45
Jul. 5		50	74	48	39
Jul. 6		39	74	40	30
Jul. 7		46	70	38	46
Jul. 8		42	82	61	46
Jul. 9		43	93	86	32
Jul. 10		53	61	75	32
Jul. 11		60	40	63	47
Jul. 12		58	46	64	42
Jul. 13		58	40	44	34
Jul. 14		56	36	58	25
Jul. 15		48	24	71	20
Jul. 16		35	21	93	19
Jul. 17		39	26	74	30
Jul. 18		51	46	61	42
Jul. 19		45	53	59	34
Jul. 20		38	38	57	34
Jul. 21		37	43	70	33
Jul. 22		33	38	86	34
Jul. 23		31	39	78	28
Jul. 24		34	45	76	28
Jul. 25		34	24		22
Jul. 26		39	26	55	26
Jul. 27		38	20		45
Jul. 28		33	25		39
Jul. 29		27	22		49
Jul. 30		24	21		73
Jul. 31		27	36		47

AQI Trends: Highest and Lowest

Highest AQI recorded on

16th Jul 2022

93AQI

Lowest AQI recorded on

16th Jul 2021

19AQI

Same Day Analysis (2nd July ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 45 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.

Day & Night AQI Trend: 2nd Jul - 3rd Jul 2025
Zhoushan, Zhejiang, China

AQI

Day

Night

4 AM2nd Jul 2025

6 PM

3 AM3rd Jul 2025

Day time

Avg. Highest Time

4AM2nd Jul

50AQI

Avg. Lowest Time

9AM2nd Jul

26AQI

Night time

Avg. Highest Time

7PM2nd Jul

52AQI

Avg. Lowest Time

3AM3rd Jul

51AQI

In the last 24 hours,

Zhoushan's AQI reached its highest point of 52 at 7 PM during the Night, while the lowest point, 26, was recorded at 9 AM during the Day between 2nd Jul and 3rd Jul 2025.

Day & Night AQI Trend : Jun - Jul 2025
Zhoushan, Zhejiang, China

JunJul

03rd - 04th04th - 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

Day

Night

21°C18/25°C

23°C17/30°C

23°C18/29°C

25°C19/31°C

26°C22/32°C

25°C23/28°C

23°C22/24°C

22°C20/23°C

21°C20/22°C

22°C21/23°C

23°C23/24°C

24°C23/26°C

23°C22/25°C

23°C20/25°C

24°C23/26°C

24°C23/25°C

25°C24/26°C

25°C24/27°C

23°C22/24°C

24°C22/25°C

23°C22/24°C

25°C24/27°C

26°C24/27°C

26°C25/27°C

26°C26/27°C

27°C26/28°C

4 AM

11 AM

6 PM

11 PM

3 AM

0°C0/0°C

Day time

Avg. Highest Time

4 AM - 7 AM

54AQI

4 hours / Day

120 hours / Month

Avg. Lowest Time

9 AM - 6 PM

47AQI

10 hours / Day

300 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 4 AM to 7 AM (Avg. 54), while the lowest AQI was between 9 AM to 6 PM (Avg. 47).

Night time

Avg. Highest Time

1 AM - 3 AM

55AQI

3 hours / Day

90 hours / Month

Avg. Lowest Time

7 PM - 11 PM

51AQI

5 hours / Day

150 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 1 AM to 3 AM (Avg. 55), while the lowest AQI was between 7 PM to 11 PM (Avg. 51).

2025 Days Vs Air Quality
Zhoushan, Zhejiang, China

2025

11%

78%

142

Total number of days with different AQI categories in last 184 days in 2025 (181 days remaining)

Good

21 Days

Moderate

142 Days

Poor

17 Days

Unhealthy

3 Days

Severe

0 Days

Hazardous

0 Days

Under WHO’s Safe Air Quality Limits: 11%

Health Risk Level:

Extreme

In 2025, 11% of 184 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.

Annual Air Quality Insights
Zhoushan, Zhejiang, China

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.

95AQI

84AQI

70AQI

69AQI

60AQI

51AQI

43AQI

No. of days

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

202571AQI

142

Highest AQI recorded in

January

95AQI

Lowest AQI recorded in

July

43AQI

202461AQI

161

169

Highest AQI recorded in

January

103AQI

Lowest AQI recorded in

July

42AQI

202362AQI

142

190

Highest AQI recorded in

December

89AQI

Lowest AQI recorded in

July

45AQI

202257AQI

159

147

Highest AQI recorded in

December

76AQI

Lowest AQI recorded in

October

41AQI

202156AQI

174

Highest AQI recorded in

January

79AQI

Lowest AQI recorded in

July

38AQI

202053AQI

139

122

Highest AQI recorded in

April

74AQI

Lowest AQI recorded in

August

45AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded

2025(Avg.)

71AQI

Least Polluted Year Recorded

2020(Avg.)

53AQI

Zhoushan's annual 2025 AQI (71) shows an average percentage change of 24.1% (worsened AQI) compared to previous years: 2020 (53), 2021 (56), 2022 (57), 2023 (62), 2024 (61).


4 AM	50
5 AM	49
6 AM	49
7 AM	50
8 AM	31
9 AM	26
10 AM	27
11 AM	30
12 PM	31
1 PM	35
2 PM	42
3 PM	42
4 PM	44
5 PM	47
6 PM	50
7 PM	52
8 PM	52
9 PM	52
10 PM	52
11 PM	52
12 AM	52
1 AM	52
2 AM	52
3 AM	51

Zhoushan, Zhejiang, China Historical Air Quality Analysis

July Air Quality AnalysisZhoushan, Zhejiang, China

Day & Night AQI Trend: 2nd Jul - 3rd Jul 2025Zhoushan, Zhejiang, China

Day & Night AQI Trend : Jun - Jul 2025Zhoushan, Zhejiang, China

2025 Days Vs Air Quality Zhoushan, Zhejiang, China

Annual Air Quality InsightsZhoushan, Zhejiang, China

AQI levels in 2025

No. of days

July Air Quality Analysis
Zhoushan, Zhejiang, China

Day & Night AQI Trend: 2nd Jul - 3rd Jul 2025
Zhoushan, Zhejiang, China

Day & Night AQI Trend : Jun - Jul 2025
Zhoushan, Zhejiang, China

2025 Days Vs Air Quality
Zhoushan, Zhejiang, China

Annual Air Quality Insights
Zhoushan, Zhejiang, China