Bureau Of Meteorology, Heze, Shandong, China Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Bureau Of Meteorology, Heze, Shandong, China
AQI Trends: Highest and Lowest
Same Day Analysis (22nd September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 63 of Moderate air quality, showing improvement over 2023, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025
Bureau Of Meteorology, Heze, Shandong, China
5 AM22nd Sep 2025
6 PM
4 AM23rd Sep 2025
67AQI
56AQI
67AQI
57AQI
In the last 24 hours,
Bureau Of Meteorology's AQI reached its highest point of 67 at 5 AM during the Night, while the lowest point, 56, was recorded at 6 PM during the Day between 22nd Sep and 23rd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Bureau Of Meteorology, Heze, Shandong, China
23°C21/27°C
25°C21/31°C
27°C22/34°C
29°C23/35°C
30°C25/37°C
28°C24/34°C
27°C23/32°C
25°C22/32°C
27°C21/34°C
26°C20/32°C
23°C22/24°C
22°C21/25°C
25°C21/30°C
22°C19/26°C
25°C20/31°C
22°C17/26°C
23°C17/31°C
24°C18/30°C
21°C19/23°C
19°C17/21°C
24°C18/30°C
25°C20/32°C
26°C22/30°C
22°C18/24°C
19°C17/22°C
17°C15/22°C
15°C14/17°C
18°C12/24°C
18°C16/21°C
15°C14/16°C
--°C/°C
65AQI
55AQI
62AQI
60AQI
2025 Days Vs Air Quality
Bureau Of Meteorology, Heze, Shandong, China
1%
3
55%
147
31%
82
10%
27
2%
5
0.3%
1
Total number of days with different AQI categories in last 266 days in 2025 (99 days remaining)
Under WHO’s Safe Air Quality Limits: 1%
Health Risk Level:
Extreme
In 2025, 1% of 266 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
Bureau Of Meteorology, Heze, Shandong, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
182AQI
149AQI
180AQI
200AQI
155AQI
107AQI
128AQI
84AQI
99AQI
117AQI
126AQI
118AQI
144AQI
224AQI
109AQI
126AQI
137AQI
154AQI
154AQI
166AQI
191AQI
173AQI
171AQI
203AQI
166AQI
141AQI
92AQI
125AQI
208AQI
169AQI
169AQI
165AQI
181AQI
163AQI
131AQI
97AQI
114AQI
81AQI
86AQI
100AQI
122AQI
145AQI
139AQI
136AQI
148AQI
152AQI
103AQI
120AQI
126AQI
98AQI
138AQI
133AQI
142AQI
95AQI
122AQI
127AQI
142AQI
156AQI
157AQI
177AQI
84AQI
95AQI
80AQI
105AQI
133AQI
128AQI
148AQI
153AQI
159AQI
162AQI
163AQI
140AQI
102AQI
137AQI
82AQI
91AQI
71AQI
109AQI
90AQI
86AQI
93AQI
118AQI
420AQI
225AQI
170AQI
140AQI
140AQI
93AQI
107AQI
109AQI
113AQI
68AQI
101AQI
130AQI
81AQI
116AQI
118AQI
143AQI
143AQI
149AQI
145AQI
202AQI
129AQI
89AQI
102AQI
123AQI
136AQI
145AQI
108AQI
117AQI
107AQI
104AQI
122AQI
83AQI
99AQI
93AQI
106AQI
81AQI
88AQI
109AQI
88AQI
108AQI
69AQI
91AQI
186AQI
135AQI
131AQI
116AQI
85AQI
75AQI
82AQI
85AQI
95AQI
98AQI
86AQI
113AQI
197AQI
106AQI
132AQI
112AQI
126AQI
124AQI
131AQI
107AQI
102AQI
96AQI
104AQI
100AQI
100AQI
96AQI
110AQI
91AQI
109AQI
82AQI
102AQI
93AQI
97AQI
106AQI
125AQI
107AQI
92AQI
96AQI
86AQI
83AQI
85AQI
68AQI
62AQI
72AQI
68AQI
55AQI
63AQI
68AQI
58AQI
65AQI
70AQI
85AQI
66AQI
70AQI
58AQI
52AQI
54AQI
48AQI
52AQI
52AQI
54AQI
54AQI
67AQI
63AQI
70AQI
54AQI
82AQI
90AQI
78AQI
72AQI
73AQI
70AQI
77AQI
69AQI
69AQI
76AQI
73AQI
68AQI
53AQI
58AQI
59AQI
62AQI
61AQI
59AQI
59AQI
53AQI
62AQI
62AQI
58AQI
57AQI
58AQI
64AQI
63AQI
68AQI
71AQI
68AQI
57AQI
62AQI
59AQI
52AQI
54AQI
61AQI
61AQI
52AQI
59AQI
60AQI
59AQI
52AQI
54AQI
57AQI
55AQI
56AQI
61AQI
63AQI
62AQI
62AQI
61AQI
62AQI
53AQI
55AQI
58AQI
61AQI
68AQI
66AQI
62AQI
67AQI
60AQI
56AQI
63AQI
56AQI
54AQI
67AQI
61AQI
60AQI
52AQI
50AQI
58AQI
47AQI
57AQI
80AQI
63AQI
151AQI
129AQI
133AQI
115AQI
109AQI
80AQI
64AQI
59AQI
60AQI
No. of days
2025101AQI
Highest AQI recorded in
January151AQI
Lowest AQI recorded in
August59AQI
2024110AQI
Highest AQI recorded in
January163AQI
Lowest AQI recorded in
August67AQI
2023115AQI
Highest AQI recorded in
January177AQI
Lowest AQI recorded in
July67AQI
2022123AQI
Highest AQI recorded in
January186AQI
Lowest AQI recorded in
August79AQI
2021125AQI
Highest AQI recorded in
March188AQI
Lowest AQI recorded in
July70AQI
2020119AQI
Highest AQI recorded in
December162AQI
Lowest AQI recorded in
August90AQI
Most & Least Polluted Years Over the Last 6 Years
Bureau Of Meteorology's annual 2025 AQI (101) shows an average percentage change of -14.5% (improved AQI) compared to previous years: 2020 (119), 2021 (125), 2022 (123), 2023 (115), 2024 (110).