Tangra, Kolkata, West Bengal, India Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Tangra, Kolkata, West Bengal, India
AQI Trends: Highest and Lowest
Same Day Analysis (20th August ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 3rd highest AQI at 58 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: 20th Aug - 21st Aug 2025
Tangra, Kolkata, West Bengal, India
5 AM20th Aug 2025
6 PM
4 AM21st Aug 2025
72AQI
48AQI
64AQI
57AQI
In the last 24 hours,
Tangra's AQI reached its highest point of 72 at 12 PM during the Day, while the lowest point, 48, was recorded at 5 AM during the Day between 20th Aug and 21st Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Tangra, Kolkata, West Bengal, India
31°C28/34°C
32°C28/36°C
30°C29/32°C
29°C28/32°C
29°C27/31°C
30°C27/34°C
29°C27/31°C
27°C27/27°C
27°C26/28°C
28°C26/32°C
29°C26/33°C
31°C28/35°C
30°C28/33°C
30°C27/33°C
30°C27/34°C
29°C28/31°C
29°C27/32°C
28°C27/30°C
30°C27/34°C
30°C27/35°C
30°C28/34°C
31°C28/35°C
30°C28/33°C
29°C27/33°C
29°C27/33°C
30°C27/34°C
29°C27/33°C
29°C27/33°C
29°C27/31°C
28°C26/30°C
--°C/°C
65AQI
65AQI
67AQI
67AQI
2025 Days Vs Air Quality
Tangra, Kolkata, West Bengal, India
56%
131
25%
58
19%
43
Total number of days with different AQI categories in last 233 days in 2025 (132 days remaining)
Under WHO’s Safe Air Quality Limits: 0%
Health Risk Level:
Extreme
In 2025, 0% of 233 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
Tangra, Kolkata, West Bengal, India
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
180AQI
165AQI
185AQI
180AQI
175AQI
168AQI
174AQI
155AQI
162AQI
178AQI
185AQI
186AQI
190AQI
184AQI
167AQI
171AQI
167AQI
168AQI
161AQI
168AQI
171AQI
173AQI
180AQI
182AQI
178AQI
156AQI
166AQI
171AQI
161AQI
150AQI
144AQI
139AQI
158AQI
157AQI
153AQI
169AQI
156AQI
149AQI
151AQI
159AQI
162AQI
149AQI
146AQI
143AQI
154AQI
155AQI
146AQI
129AQI
130AQI
134AQI
126AQI
136AQI
127AQI
136AQI
144AQI
154AQI
154AQI
164AQI
157AQI
132AQI
141AQI
139AQI
132AQI
145AQI
127AQI
148AQI
137AQI
137AQI
133AQI
114AQI
127AQI
114AQI
118AQI
109AQI
101AQI
104AQI
108AQI
136AQI
107AQI
123AQI
88AQI
126AQI
134AQI
146AQI
116AQI
125AQI
134AQI
145AQI
139AQI
122AQI
111AQI
94AQI
96AQI
113AQI
114AQI
101AQI
82AQI
77AQI
68AQI
67AQI
69AQI
73AQI
79AQI
87AQI
94AQI
96AQI
79AQI
74AQI
93AQI
96AQI
91AQI
87AQI
99AQI
88AQI
82AQI
70AQI
88AQI
105AQI
78AQI
84AQI
80AQI
80AQI
79AQI
79AQI
83AQI
85AQI
92AQI
92AQI
93AQI
106AQI
109AQI
99AQI
90AQI
92AQI
80AQI
80AQI
76AQI
67AQI
60AQI
60AQI
63AQI
73AQI
65AQI
68AQI
62AQI
60AQI
60AQI
59AQI
60AQI
64AQI
82AQI
89AQI
109AQI
100AQI
86AQI
86AQI
93AQI
107AQI
114AQI
110AQI
108AQI
93AQI
76AQI
71AQI
74AQI
72AQI
63AQI
64AQI
64AQI
64AQI
66AQI
75AQI
84AQI
79AQI
70AQI
69AQI
63AQI
61AQI
67AQI
67AQI
70AQI
68AQI
62AQI
65AQI
68AQI
70AQI
67AQI
65AQI
61AQI
64AQI
62AQI
65AQI
68AQI
71AQI
66AQI
67AQI
70AQI
70AQI
70AQI
70AQI
69AQI
70AQI
66AQI
65AQI
65AQI
64AQI
60AQI
60AQI
65AQI
66AQI
59AQI
66AQI
74AQI
77AQI
75AQI
77AQI
76AQI
74AQI
83AQI
76AQI
64AQI
61AQI
64AQI
73AQI
67AQI
62AQI
59AQI
59AQI
59AQI
56AQI
58AQI
58AQI
171AQI
148AQI
126AQI
88AQI
77AQI
80AQI
66AQI
68AQI
No. of days
2025104AQI
Highest AQI recorded in
January171AQI
Lowest AQI recorded in
July66AQI
2024118AQI
Highest AQI recorded in
January213AQI
Lowest AQI recorded in
July60AQI
2023121AQI
Highest AQI recorded in
November183AQI
Lowest AQI recorded in
July50AQI
2022114AQI
Highest AQI recorded in
December200AQI
Lowest AQI recorded in
July43AQI
2021137AQI
Highest AQI recorded in
December168AQI
Lowest AQI recorded in
September80AQI
Most & Least Polluted Years Over the Last 5 Years
Tangra's annual 2025 AQI (104) shows an average percentage change of -14.5% (improved AQI) compared to previous years: 2021 (137), 2022 (114), 2023 (121), 2024 (118).