Dayong, Ruian, Zhejiang, China Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Dayong, Ruian, Zhejiang, China
AQI Trends: Highest and Lowest
Same Day Analysis (26th October ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 1st highest AQI at 100 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 26th Oct - 27th Oct 2025
Dayong, Ruian, Zhejiang, China
5 AM26th Oct 2025
5 PM
4 AM27th Oct 2025
AQI
AQI
104AQI
71AQI
In the last 24 hours,
Dayong's AQI reached its highest point of 104 at 9 AM during the Night, while the lowest point, 71, was recorded at 11 PM during the Night between 26th Oct and 27th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Dayong, Ruian, Zhejiang, China
25°C21/32°C
26°C21/32°C
26°C22/33°C
26°C22/33°C
25°C22/31°C
25°C21/31°C
25°C21/31°C
25°C21/30°C
26°C21/33°C
26°C21/33°C
26°C21/33°C
25°C22/30°C
23°C20/28°C
24°C19/30°C
24°C19/32°C
25°C20/32°C
26°C22/32°C
26°C23/29°C
25°C21/30°C
25°C21/30°C
24°C20/29°C
25°C20/30°C
23°C19/25°C
19°C17/21°C
14°C13/15°C
14°C12/16°C
16°C11/23°C
16°C11/24°C
17°C11/24°C
--°C/°C
--°C/°C
66AQI
63AQI
66AQI
61AQI
2025 Days Vs Air Quality
Dayong, Ruian, Zhejiang, China
20%
60
71%
212
9%
27
Total number of days with different AQI categories in last 299 days in 2025 (66 days remaining)
Under WHO’s Safe Air Quality Limits: 20%
Health Risk Level:
Very high
In 2025, 20% of 299 days were within WHO’s safe air quality limits. The risk of health issues is Very high, including respiratory issues, heart disease, and stress, particularly affecting vulnerable groups.
Annual Air Quality Insights
Dayong, Ruian, Zhejiang, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
125AQI
111AQI
118AQI
112AQI
112AQI
129AQI
129AQI
127AQI
110AQI
94AQI
90AQI
92AQI
101AQI
95AQI
127AQI
85AQI
99AQI
90AQI
94AQI
105AQI
128AQI
118AQI
107AQI
90AQI
81AQI
67AQI
66AQI
71AQI
103AQI
78AQI
83AQI
59AQI
60AQI
89AQI
96AQI
89AQI
94AQI
74AQI
67AQI
70AQI
83AQI
79AQI
91AQI
129AQI
113AQI
131AQI
99AQI
120AQI
85AQI
89AQI
62AQI
61AQI
66AQI
70AQI
108AQI
128AQI
124AQI
113AQI
91AQI
89AQI
80AQI
80AQI
60AQI
68AQI
61AQI
78AQI
80AQI
90AQI
80AQI
99AQI
84AQI
68AQI
67AQI
45AQI
68AQI
70AQI
72AQI
79AQI
79AQI
74AQI
76AQI
85AQI
93AQI
93AQI
110AQI
107AQI
80AQI
76AQI
65AQI
64AQI
67AQI
73AQI
78AQI
82AQI
80AQI
86AQI
85AQI
88AQI
91AQI
78AQI
82AQI
103AQI
91AQI
94AQI
80AQI
86AQI
91AQI
90AQI
75AQI
78AQI
81AQI
68AQI
67AQI
63AQI
50AQI
62AQI
61AQI
68AQI
74AQI
76AQI
78AQI
78AQI
80AQI
72AQI
71AQI
76AQI
86AQI
71AQI
64AQI
62AQI
66AQI
67AQI
67AQI
67AQI
71AQI
66AQI
65AQI
56AQI
59AQI
58AQI
53AQI
61AQI
58AQI
65AQI
83AQI
82AQI
81AQI
65AQI
56AQI
65AQI
68AQI
63AQI
62AQI
53AQI
63AQI
57AQI
62AQI
67AQI
56AQI
59AQI
53AQI
49AQI
48AQI
42AQI
49AQI
47AQI
51AQI
52AQI
50AQI
48AQI
45AQI
49AQI
53AQI
48AQI
52AQI
56AQI
52AQI
52AQI
46AQI
49AQI
44AQI
42AQI
40AQI
48AQI
52AQI
50AQI
50AQI
40AQI
46AQI
46AQI
47AQI
44AQI
43AQI
49AQI
53AQI
58AQI
57AQI
57AQI
58AQI
46AQI
44AQI
36AQI
38AQI
41AQI
39AQI
40AQI
35AQI
37AQI
39AQI
39AQI
48AQI
46AQI
55AQI
59AQI
56AQI
54AQI
51AQI
52AQI
50AQI
55AQI
56AQI
58AQI
59AQI
60AQI
49AQI
43AQI
43AQI
45AQI
46AQI
45AQI
49AQI
52AQI
52AQI
52AQI
53AQI
53AQI
52AQI
50AQI
48AQI
46AQI
46AQI
47AQI
51AQI
54AQI
54AQI
57AQI
61AQI
60AQI
58AQI
60AQI
57AQI
52AQI
54AQI
55AQI
55AQI
56AQI
56AQI
60AQI
52AQI
52AQI
54AQI
54AQI
53AQI
48AQI
52AQI
53AQI
52AQI
45AQI
39AQI
38AQI
47AQI
58AQI
59AQI
57AQI
56AQI
44AQI
53AQI
53AQI
77AQI
65AQI
68AQI
64AQI
67AQI
67AQI
72AQI
72AQI
70AQI
55AQI
70AQI
72AQI
83AQI
47AQI
53AQI
55AQI
55AQI
65AQI
72AQI
84AQI
100AQI
101AQI
91AQI
78AQI
78AQI
68AQI
53AQI
45AQI
51AQI
54AQI
65AQI
No. of days
202568AQI
Highest AQI recorded in
January101AQI
Lowest AQI recorded in
July45AQI
202462AQI
Highest AQI recorded in
December99AQI
Lowest AQI recorded in
July47AQI
202369AQI
Highest AQI recorded in
November70AQI
Lowest AQI recorded in
December69AQI
202259AQI
Highest AQI recorded in
April72AQI
Lowest AQI recorded in
June43AQI
202164AQI
Highest AQI recorded in
January102AQI
Lowest AQI recorded in
August44AQI
202067AQI
Highest AQI recorded in
April91AQI
Lowest AQI recorded in
August50AQI
Most & Least Polluted Years Over the Last 6 Years
Dayong's annual 2025 AQI (68) shows an average percentage change of 6.4% (worsened AQI) compared to previous years: 2020 (67), 2021 (64), 2022 (59), 2023 (69), 2024 (62).