Dongshan Mills, Hegang, 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
Dongshan Mills, Hegang, Heilongjiang, China
AQI Trends: Highest and Lowest
Same Day Analysis (18th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 61 of Moderate air quality, showing improvement over 2024 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Oct - 19th Oct 2025
Dongshan Mills, Hegang, Heilongjiang, China
7 AM18th Oct 2025
6 PM
6 AM19th Oct 2025
70AQI
54AQI
69AQI
49AQI
In the last 24 hours,
Dongshan Mills's AQI reached its highest point of 70 at 9 AM during the Day, while the lowest point, 49, was recorded at 8 PM during the Night between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Dongshan Mills, Hegang, Heilongjiang, China
14°C8/21°C
13°C8/19°C
14°C7/21°C
16°C11/22°C
16°C10/23°C
14°C13/18°C
14°C12/19°C
16°C11/21°C
18°C13/26°C
15°C8/21°C
13°C6/21°C
17°C10/24°C
14°C6/19°C
11°C4/18°C
15°C9/21°C
16°C10/24°C
9°C4/13°C
7°C2/13°C
8°C2/13°C
6°C2/9°C
6°C0/12°C
6°C1/11°C
6°C1/11°C
4°C0/9°C
2°C-1/7°C
1°C-2/6°C
0°C-3/4°C
1°C-3/7°C
-1°C-5/0°C
-2°C-7/3°C
--°C/°C
65AQI
53AQI
83AQI
61AQI
2025 Days Vs Air Quality
Dongshan Mills, Hegang, Heilongjiang, China
25%
74
60%
176
14%
40
0.3%
1
Total number of days with different AQI categories in last 292 days in 2025 (73 days remaining)
Under WHO’s Safe Air Quality Limits: 25%
Health Risk Level:
Very high
In 2025, 25% of 292 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
Dongshan Mills, Hegang, Heilongjiang, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
118AQI
144AQI
133AQI
146AQI
125AQI
119AQI
121AQI
95AQI
95AQI
99AQI
128AQI
139AQI
163AQI
146AQI
131AQI
112AQI
140AQI
130AQI
145AQI
134AQI
123AQI
122AQI
104AQI
144AQI
143AQI
144AQI
105AQI
110AQI
91AQI
84AQI
99AQI
117AQI
128AQI
121AQI
93AQI
76AQI
65AQI
68AQI
79AQI
80AQI
69AQI
111AQI
93AQI
93AQI
88AQI
92AQI
73AQI
66AQI
71AQI
67AQI
67AQI
65AQI
55AQI
60AQI
70AQI
97AQI
67AQI
97AQI
90AQI
64AQI
65AQI
66AQI
86AQI
96AQI
85AQI
81AQI
79AQI
94AQI
122AQI
75AQI
90AQI
66AQI
66AQI
56AQI
70AQI
62AQI
64AQI
78AQI
122AQI
67AQI
78AQI
56AQI
65AQI
60AQI
60AQI
60AQI
55AQI
60AQI
58AQI
83AQI
101AQI
101AQI
113AQI
109AQI
98AQI
97AQI
98AQI
91AQI
89AQI
108AQI
95AQI
117AQI
84AQI
75AQI
61AQI
61AQI
102AQI
83AQI
83AQI
67AQI
87AQI
70AQI
75AQI
78AQI
75AQI
59AQI
65AQI
58AQI
68AQI
75AQI
85AQI
70AQI
58AQI
55AQI
52AQI
53AQI
63AQI
68AQI
66AQI
66AQI
76AQI
114AQI
116AQI
101AQI
91AQI
72AQI
70AQI
48AQI
57AQI
58AQI
47AQI
53AQI
53AQI
50AQI
45AQI
53AQI
57AQI
64AQI
73AQI
74AQI
81AQI
65AQI
63AQI
56AQI
48AQI
53AQI
49AQI
51AQI
53AQI
56AQI
48AQI
42AQI
49AQI
58AQI
57AQI
50AQI
58AQI
54AQI
54AQI
58AQI
55AQI
43AQI
37AQI
50AQI
51AQI
60AQI
58AQI
59AQI
61AQI
61AQI
58AQI
53AQI
53AQI
54AQI
55AQI
59AQI
52AQI
50AQI
47AQI
54AQI
46AQI
55AQI
54AQI
46AQI
49AQI
49AQI
45AQI
54AQI
54AQI
51AQI
50AQI
49AQI
52AQI
54AQI
51AQI
54AQI
51AQI
54AQI
45AQI
46AQI
46AQI
45AQI
46AQI
46AQI
40AQI
42AQI
42AQI
37AQI
37AQI
37AQI
36AQI
35AQI
34AQI
39AQI
40AQI
35AQI
45AQI
43AQI
39AQI
40AQI
43AQI
43AQI
41AQI
39AQI
40AQI
42AQI
40AQI
39AQI
41AQI
43AQI
43AQI
48AQI
52AQI
46AQI
48AQI
47AQI
70AQI
66AQI
48AQI
46AQI
44AQI
43AQI
39AQI
41AQI
47AQI
50AQI
51AQI
44AQI
46AQI
41AQI
48AQI
50AQI
48AQI
46AQI
51AQI
60AQI
58AQI
59AQI
60AQI
65AQI
63AQI
56AQI
63AQI
65AQI
60AQI
78AQI
93AQI
71AQI
67AQI
86AQI
74AQI
67AQI
79AQI
98AQI
94AQI
78AQI
78AQI
88AQI
70AQI
73AQI
61AQI
124AQI
83AQI
74AQI
85AQI
67AQI
54AQI
51AQI
41AQI
51AQI
77AQI
No. of days
202570AQI
Highest AQI recorded in
January124AQI
Lowest AQI recorded in
August41AQI
202478AQI
Highest AQI recorded in
January99AQI
Lowest AQI recorded in
June42AQI
202372AQI
Highest AQI recorded in
January101AQI
Lowest AQI recorded in
August39AQI
202269AQI
Highest AQI recorded in
January91AQI
Lowest AQI recorded in
July44AQI
202176AQI
Highest AQI recorded in
January98AQI
Lowest AQI recorded in
August56AQI
202064AQI
Highest AQI recorded in
December90AQI
Lowest AQI recorded in
August47AQI
Most & Least Polluted Years Over the Last 6 Years
Dongshan Mills's annual 2025 AQI (70) shows an average percentage change of -1.1% (improved AQI) compared to previous years: 2020 (64), 2021 (76), 2022 (69), 2023 (72), 2024 (78).