Mudanjiang First Middle School, Mudanjiang, Heilongjiang, 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
Mudanjiang First Middle School, Mudanjiang, Heilongjiang, China
AQI Trends: Highest and Lowest
Same Day Analysis (12th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 73 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Oct - 13th Oct 2025
Mudanjiang First Middle School, Mudanjiang, Heilongjiang, China
7 AM12th Oct 2025
7 PM
6 AM13th Oct 2025
69AQI
44AQI
85AQI
64AQI
In the last 24 hours,
Mudanjiang First Middle School's AQI reached its highest point of 85 at 11 PM during the Night, while the lowest point, 44, was recorded at 4 PM during the Day between 12th Oct and 13th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Mudanjiang First Middle School, Mudanjiang, Heilongjiang, China
19°C14/26°C
20°C13/28°C
17°C12/23°C
15°C11/21°C
13°C7/19°C
12°C4/20°C
14°C7/22°C
14°C8/22°C
13°C6/21°C
14°C7/22°C
16°C8/24°C
14°C10/17°C
15°C9/23°C
15°C9/22°C
17°C10/26°C
15°C11/21°C
14°C8/22°C
16°C9/26°C
16°C11/25°C
17°C11/26°C
18°C12/27°C
17°C10/25°C
12°C6/16°C
8°C3/14°C
10°C4/18°C
7°C4/12°C
6°C1/12°C
8°C2/16°C
8°C5/12°C
8°C5/13°C
--°C/°C
62AQI
46AQI
67AQI
56AQI
2025 Days Vs Air Quality
Mudanjiang First Middle School, Mudanjiang, Heilongjiang, China
24%
68
60%
170
15%
42
2%
5
Total number of days with different AQI categories in last 286 days in 2025 (79 days remaining)
Under WHO’s Safe Air Quality Limits: 24%
Health Risk Level:
Very high
In 2025, 24% of 286 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
Mudanjiang First Middle School, Mudanjiang, Heilongjiang, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
123AQI
110AQI
108AQI
108AQI
136AQI
137AQI
140AQI
109AQI
98AQI
109AQI
126AQI
126AQI
139AQI
123AQI
106AQI
100AQI
118AQI
138AQI
137AQI
156AQI
162AQI
168AQI
158AQI
144AQI
143AQI
164AQI
125AQI
118AQI
128AQI
100AQI
108AQI
102AQI
131AQI
114AQI
108AQI
99AQI
86AQI
87AQI
84AQI
87AQI
96AQI
116AQI
106AQI
98AQI
97AQI
97AQI
110AQI
81AQI
81AQI
78AQI
82AQI
79AQI
78AQI
78AQI
76AQI
83AQI
66AQI
90AQI
113AQI
84AQI
77AQI
79AQI
75AQI
88AQI
81AQI
80AQI
103AQI
116AQI
116AQI
137AQI
102AQI
93AQI
74AQI
74AQI
72AQI
72AQI
83AQI
95AQI
102AQI
115AQI
71AQI
90AQI
98AQI
90AQI
103AQI
86AQI
72AQI
70AQI
68AQI
84AQI
90AQI
85AQI
85AQI
98AQI
95AQI
75AQI
66AQI
73AQI
82AQI
91AQI
106AQI
87AQI
77AQI
65AQI
65AQI
59AQI
89AQI
79AQI
67AQI
85AQI
105AQI
70AQI
64AQI
78AQI
65AQI
62AQI
68AQI
100AQI
104AQI
84AQI
75AQI
68AQI
65AQI
57AQI
53AQI
52AQI
62AQI
72AQI
64AQI
56AQI
63AQI
63AQI
71AQI
66AQI
57AQI
58AQI
57AQI
54AQI
55AQI
57AQI
69AQI
58AQI
53AQI
51AQI
48AQI
51AQI
54AQI
58AQI
57AQI
63AQI
63AQI
63AQI
57AQI
55AQI
58AQI
57AQI
48AQI
54AQI
49AQI
60AQI
56AQI
47AQI
50AQI
54AQI
59AQI
64AQI
55AQI
56AQI
57AQI
56AQI
54AQI
48AQI
44AQI
49AQI
52AQI
54AQI
56AQI
56AQI
56AQI
54AQI
57AQI
47AQI
42AQI
48AQI
49AQI
46AQI
51AQI
47AQI
49AQI
48AQI
47AQI
47AQI
45AQI
48AQI
48AQI
44AQI
45AQI
47AQI
43AQI
40AQI
43AQI
51AQI
46AQI
51AQI
43AQI
45AQI
52AQI
50AQI
45AQI
46AQI
46AQI
51AQI
52AQI
54AQI
48AQI
48AQI
49AQI
45AQI
45AQI
42AQI
47AQI
50AQI
47AQI
48AQI
45AQI
44AQI
52AQI
51AQI
43AQI
45AQI
50AQI
46AQI
44AQI
43AQI
48AQI
44AQI
46AQI
40AQI
43AQI
42AQI
42AQI
51AQI
55AQI
48AQI
53AQI
49AQI
56AQI
59AQI
51AQI
51AQI
53AQI
51AQI
49AQI
52AQI
55AQI
56AQI
55AQI
50AQI
53AQI
48AQI
51AQI
49AQI
55AQI
58AQI
54AQI
55AQI
58AQI
44AQI
45AQI
52AQI
49AQI
60AQI
65AQI
61AQI
73AQI
67AQI
67AQI
69AQI
70AQI
74AQI
62AQI
66AQI
63AQI
61AQI
73AQI
128AQI
93AQI
89AQI
81AQI
60AQI
55AQI
47AQI
47AQI
53AQI
67AQI
No. of days
202572AQI
Highest AQI recorded in
January128AQI
Lowest AQI recorded in
August47AQI
202478AQI
Highest AQI recorded in
January118AQI
Lowest AQI recorded in
August51AQI
202375AQI
Highest AQI recorded in
January112AQI
Lowest AQI recorded in
July32AQI
202270AQI
Highest AQI recorded in
January117AQI
Lowest AQI recorded in
July36AQI
202172AQI
Highest AQI recorded in
January122AQI
Lowest AQI recorded in
August38AQI
202062AQI
Highest AQI recorded in
December108AQI
Lowest AQI recorded in
August36AQI
Most & Least Polluted Years Over the Last 6 Years
Mudanjiang First Middle School's annual 2025 AQI (72) shows an average percentage change of 1.3% (worsened AQI) compared to previous years: 2020 (62), 2021 (72), 2022 (70), 2023 (75), 2024 (78).