Siwan, Bihar, India Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
July Air Quality Analysis
Siwan, Bihar, India
AQI Trends: Highest and Lowest
Same Day Analysis (18th July):
On this day, AQI across the 4 years varied significantly: 2026 ranks 1st highest AQI at 134 of Poor air quality on the same day.
Day & Night AQI Trend: 17th Jul - 18th Jul 2026
Siwan, Bihar, India
5 AM17th Jul 2026
6 PM
4 AM18th Jul 2026
126AQI
78AQI
152AQI
125AQI
In the last 24 hours,
Siwan's AQI reached its highest point of 152 at 2 AM during the Night, while the lowest point, 78, was recorded at 2 PM during the Day between 17th Jul and 18th Jul 2026.
Day & Night AQI Trend : Jun - Jul 2026
Siwan, Bihar, India
40°C34/44°C
39°C32/45°C
40°C33/47°C
37°C31/42°C
39°C32/45°C
39°C32/44°C
40°C34/45°C
40°C34/45°C
40°C36/45°C
39°C35/45°C
39°C33/45°C
35°C30/42°C
35°C30/39°C
36°C33/38°C
36°C32/38°C
37°C32/40°C
36°C32/39°C
32°C29/37°C
32°C28/36°C
33°C29/36°C
33°C28/36°C
34°C31/37°C
33°C29/35°C
34°C31/38°C
36°C32/41°C
32°C30/37°C
35°C30/40°C
34°C32/37°C
34°C32/37°C
33°C30/36°C
101AQI
92AQI
120AQI
107AQI
2026 Days Vs Air Quality
Siwan, Bihar, India
32%
64
40%
79
19%
38
9%
18
Total number of days with different AQI categories in last 199 days in 2026 (166 days remaining)
Under WHO’s Safe Air Quality Limits: 0%
Health Risk Level:
Extreme
In 2026, 0% of 199 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
Siwan, Bihar, India
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
225AQI (US)
231AQI (US)
183AQI (US)
175AQI (US)
200AQI (US)
219AQI (US)
176AQI (US)
157AQI (US)
145AQI (US)
147AQI (US)
173AQI (US)
141AQI (US)
142AQI (US)
134AQI (US)
148AQI (US)
161AQI (US)
169AQI (US)
131AQI (US)
144AQI (US)
135AQI (US)
132AQI (US)
138AQI (US)
140AQI (US)
141AQI (US)
136AQI (US)
94AQI (US)
106AQI (US)
120AQI (US)
74AQI (US)
73AQI (US)
91AQI (US)
103AQI (US)
121AQI (US)
110AQI (US)
115AQI (US)
94AQI (US)
97AQI (US)
126AQI (US)
160AQI (US)
207AQI (US)
203AQI (US)
209AQI (US)
194AQI (US)
170AQI (US)
178AQI (US)
179AQI (US)
198AQI (US)
214AQI (US)
189AQI (US)
187AQI (US)
190AQI (US)
157AQI (US)
176AQI (US)
198AQI (US)
203AQI (US)
197AQI (US)
173AQI (US)
177AQI (US)
175AQI (US)
169AQI (US)
156AQI (US)
196AQI (US)
228AQI (US)
206AQI (US)
204AQI (US)
202AQI (US)
209AQI (US)
201AQI (US)
181AQI (US)
230AQI (US)
208AQI (US)
198AQI (US)
175AQI (US)
204AQI (US)
175AQI (US)
128AQI (US)
181AQI (US)
213AQI (US)
176AQI (US)
166AQI (US)
136AQI (US)
144AQI (US)
131AQI (US)
128AQI (US)
157AQI (US)
190AQI (US)
107AQI (US)
140AQI (US)
157AQI (US)
173AQI (US)
149AQI (US)
123AQI (US)
124AQI (US)
123AQI (US)
76AQI (US)
92AQI (US)
69AQI (US)
86AQI (US)
67AQI (US)
72AQI (US)
76AQI (US)
93AQI (US)
99AQI (US)
79AQI (US)
103AQI (US)
103AQI (US)
80AQI (US)
82AQI (US)
64AQI (US)
63AQI (US)
95AQI (US)
92AQI (US)
128AQI (US)
142AQI (US)
149AQI (US)
108AQI (US)
67AQI (US)
81AQI (US)
97AQI (US)
88AQI (US)
123AQI (US)
121AQI (US)
113AQI (US)
105AQI (US)
94AQI (US)
99AQI (US)
54AQI (US)
59AQI (US)
56AQI (US)
61AQI (US)
63AQI (US)
78AQI (US)
70AQI (US)
80AQI (US)
65AQI (US)
144AQI (US)
122AQI (US)
111AQI (US)
106AQI (US)
102AQI (US)
118AQI (US)
113AQI (US)
127AQI (US)
118AQI (US)
120AQI (US)
81AQI (US)
76AQI (US)
84AQI (US)
83AQI (US)
68AQI (US)
136AQI (US)
149AQI (US)
98AQI (US)
85AQI (US)
87AQI (US)
126AQI (US)
91AQI (US)
81AQI (US)
104AQI (US)
99AQI (US)
106AQI (US)
111AQI (US)
102AQI (US)
82AQI (US)
70AQI (US)
106AQI (US)
118AQI (US)
130AQI (US)
112AQI (US)
108AQI (US)
90AQI (US)
118AQI (US)
91AQI (US)
124AQI (US)
115AQI (US)
130AQI (US)
96AQI (US)
137AQI (US)
119AQI (US)
103AQI (US)
117AQI (US)
137AQI (US)
112AQI (US)
100AQI (US)
106AQI (US)
73AQI (US)
68AQI (US)
84AQI (US)
112AQI (US)
110AQI (US)
78AQI (US)
93AQI (US)
81AQI (US)
89AQI (US)
74AQI (US)
91AQI (US)
100AQI (US)
112AQI (US)
134AQI (US)
148AQI (US)
168AQI (US)
176AQI (US)
96AQI (US)
95AQI (US)
107AQI (US)
97AQI (US)
No. of days
2026128AQI (US)
Highest AQI (US) recorded in
March176AQI (US)
Lowest AQI (US) recorded in
May95AQI (US)
2025126AQI (US)
Highest AQI (US) recorded in
December240AQI (US)
Lowest AQI (US) recorded in
July64AQI (US)
2024117AQI (US)
Highest AQI (US) recorded in
January159AQI (US)
Lowest AQI (US) recorded in
July59AQI (US)
2023155AQI (US)
Highest AQI (US) recorded in
January273AQI (US)
Lowest AQI (US) recorded in
August89AQI (US)
2022227AQI (US)
Highest AQI (US) recorded in
December317AQI (US)
Lowest AQI (US) recorded in
September88AQI (US)
Most & Least Polluted Years Over the Last 5 Years
Siwan's annual 2026 AQI (US) (128) shows an average percentage change of -12.5% (improved AQI (US)) compared to previous years: 2022 (227), 2023 (155), 2024 (117), 2025 (126).