Fine particles
84.3µg/m³Poor · 1 hourCAMS model • Open-Meteo
KolkataAir quality, PM2.5 and PM10
Check PM2.5 and PM10 particle levels alongside ozone, nitrogen dioxide and other gases. Compare the latest available concentrations with recent days and explore changes in air pollution through the available historical records.
Kolkata - latest available concentrations (November 11, 2026, 07:30 local time): PM2.5: 84.3 µg/m³, PM10: 85.2 µg/m³, O₃: 82 µg/m³, NO₂: 27.1 µg/m³, SO₂: 38.4 µg/m³, CO: 938 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →Kolkata · Air pollutant concentrations
Data time: November 11, 2026 · 07:30 · local timeParticulate matter
85.2µg/m³Moderate · 1 hourOzone
82µg/m³Fair · 1 hourNitrogen dioxide
27.1µg/m³Moderate · 1 hourSulphur dioxide
38.4µg/m³Fair · 1 hourCarbon monoxide
938µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Kolkata
Kolkata - air pollution over recent days (2026-08-31 - 2026-11-10)
Concentrations of all available pollutants for this city.
PM2.5Lowest 10.58 2026-08-31Highest 132.63 2026-11-072026-08-31 - 2026-11-10
PM10Lowest 11.43 2026-08-31Highest 154.11 2026-11-072026-08-31 - 2026-11-10
O₃Lowest 81.42 2026-09-02Highest 107.29 2026-11-102026-08-31 - 2026-11-10
NO₂Lowest 6.33 2026-08-31Highest 28.45 2026-11-052026-08-31 - 2026-11-10
SO₂Lowest 7.85 2026-09-01Highest 39.8 2026-11-052026-08-31 - 2026-11-10
COLowest 311.79 2026-08-31Highest 1,191.5 2026-11-102026-08-31 - 2026-11-10
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-11-10 | 2026-11-09 | 2026-11-08 | 2026-11-07 | 2026-11-06 | 2026-11-05 | 2026-11-04 | 2026-09-07 | 2026-09-06 | 2026-09-05 | 2026-09-04 | 2026-09-03 | 2026-09-02 | 2026-09-01 | 2026-08-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 70.68 | 81.98 | 105.71 | 132.63 | 124.77 | 101.32 | 74.15 | 33.1 | 31.54 | 28.64 | 27.35 | 33.38 | 30.21 | 12.19 | 10.58 |
| PM10 | 72.01 | 83.8 | 113.7 | 154.11 | 140.65 | 108.98 | 75.6 | 36.62 | 38.71 | 34.08 | 31.69 | 40.2 | 34 | 12.9 | 11.43 |
| O₃ | 107.29 | 107.04 | 105.83 | 104.88 | 98.04 | 92.79 | 99.96 | 91.83 | 92.75 | 91.96 | 95.13 | 95.29 | 81.42 | 86 | 93.13 |
| NO₂ | 26.38 | 25.29 | 21.05 | 24.91 | 28.05 | 28.45 | 19.18 | 10.43 | 7.56 | 8.46 | 8.8 | 10 | 11.47 | 7.13 | 6.33 |
| SO₂ | 32.5 | 30.68 | 30.93 | 34.25 | 36.28 | 39.8 | 27.2 | 12.68 | 11.14 | 10.89 | 12.11 | 13.48 | 13.32 | 7.85 | 7.87 |
| CO | 1,191.5 | 863.08 | 778.75 | 799.08 | 854.83 | 860.29 | 740.79 | 592.79 | 384.13 | 444.63 | 423.63 | 435.29 | 422.46 | 335.63 | 311.79 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · Kolkata
Kolkata - air pollution history (2015-12 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM2.5Lowest 15.4 2019-08Highest 209 2018-012015-12 - 2020-05
PM10Lowest 15.7 2016-06Highest 184 2017-012015-12 - 2020-05
O₃Lowest 12.2 2016-09Highest 86.5 2017-062015-12 - 2020-05
NO₂Lowest 20.2 2017-04Highest 104 2017-012015-12 - 2020-05
SO₂Lowest 5.85 2017-10Highest 11.1 2017-072015-12 - 2020-05
COLowest 1 2016-10Highest 899 2017-032015-12 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 | 2016-02 | 2016-01 | 2015-12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 20.3 | 28 | 61 | 120 | 141 | 148 | 128 | 54.1 | 18.7 | 15.4 | 19.2 | 22.2 | 36.3 | 32.9 | 61.5 | 93.8 | 187 | 174 | 125 | 79 | 61.9 | 33.3 | 30.3 | 40.2 | 31.7 | 43.2 | 81.5 | 104 | 209 | 162 | 101 | 48.4 | 39.7 | 31.5 | 35.5 | 33.4 | 40.1 | 45.1 | 59.7 | 121 | 151 | 185 | 162 | 68.4 | 20.5 | 35.9 | 32.7 | 29 | 35 | 41.4 | 73.1 | 99.9 | 161 | 162 |
| PM10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 96.3 | — | — | 30.1 | 54.1 | 50.9 | 58.5 | 66 | 139 | 184 | 158 | 143 | 75.5 | 24.2 | 29.1 | 24.4 | 15.7 | — | — | — | — | — | — |
| O₃ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 24 | — | — | 19.3 | 86.5 | 50.1 | 38.9 | 25.6 | 21.5 | 12.7 | 13.6 | 14.6 | 16.3 | 12.2 | 13.9 | 17.4 | 16.5 | — | — | — | — | — | — |
| NO₂ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 44.6 | — | — | 46.2 | 38.9 | 36.8 | 20.2 | 26.1 | 65.7 | 104 | 103 | 42 | 36.4 | 22.2 | 25.6 | 21.6 | 21.4 | — | — | — | — | — | — |
| SO₂ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5.85 | — | — | 11.1 | 10.9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| CO | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 638 | 775 | 1 | 758 | 899 | 1 | 2 | 1 | 2 | 1 | 506 | 524 | 559 | 553 | — | — | — | — | — | — |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
Historical data by station 2
AIR QUALITY ARCHIVE · US Diplomatic Post: Kolkata
US Diplomatic Post: Kolkata
Station code: US Diplomatic Post: Kolkata
Monthly monitoring station data.
PM2.5Lowest 15.4 2019-08Highest 209 2018-012015-12 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 | 2016-02 | 2016-01 | 2015-12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 20.3 | 28 | 61 | 120 | 141 | 148 | 128 | 54.1 | 18.7 | 15.4 | 19.2 | 22.2 | 36.3 | 32.9 | 61.5 | 93.8 | 187 | 174 | 125 | 79 | 61.9 | 33.3 | 30.3 | 40.2 | 31.7 | 43.2 | 81.5 | 104 | 209 | 162 | 101 | 48.4 | 39.7 | 31.5 | 35.5 | 33.4 | 40.1 | 45.1 | 59.7 | 121 | 151 | 185 | 162 | 68.4 | 20.5 | 35.9 | 32.7 | 29 | 35 | 41.4 | 73.1 | 99.9 | 161 | 162 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
How should I interpret the data and averaging period? →
OpenAQ ↗StateAir_Kolkata
AIR QUALITY ARCHIVE · Victoria Memorial - WBSPCB
Victoria Memorial - WBSPCB
Station code: Victoria Memorial - WBSPCB
Monthly monitoring station data.
PM10Lowest 15.7 2016-06Highest 184 2017-012016-06 - 2017-10
O₃Lowest 12.2 2016-09Highest 86.5 2017-062016-06 - 2017-10
NO₂Lowest 20.2 2017-04Highest 104 2017-012016-06 - 2017-10
SO₂Lowest 5.85 2017-10Highest 11.1 2017-072016-06 - 2017-10
COLowest 1 2016-10Highest 899 2017-032016-06 - 2017-10
Scroll the chart or table sideways to see the full period.
| Pollutant | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM10 | 96.3 | — | — | 30.1 | 54.1 | 50.9 | 58.5 | 66 | 139 | 184 | 158 | 143 | 75.5 | 24.2 | 29.1 | 24.4 | 15.7 |
| O₃ | 24 | — | — | 19.3 | 86.5 | 50.1 | 38.9 | 25.6 | 21.5 | 12.7 | 13.6 | 14.6 | 16.3 | 12.2 | 13.9 | 17.4 | 16.5 |
| NO₂ | 44.6 | — | — | 46.2 | 38.9 | 36.8 | 20.2 | 26.1 | 65.7 | 104 | 103 | 42 | 36.4 | 22.2 | 25.6 | 21.6 | 21.4 |
| SO₂ | 5.85 | — | — | 11.1 | 10.9 | — | — | — | — | — | — | — | — | — | — | — | — |
| CO | 1 | — | — | 638 | 775 | 1 | 758 | 899 | 1 | 2 | 1 | 2 | 1 | 506 | 524 | 559 | 553 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
How should I interpret the data and averaging period? →
OpenAQ ↗CPCB
Environment and quality of life ratings · Kolkata
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Kolkata | Nepal | Bangladesh | Bhutan | Sri Lanka | Pakistan |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 47% | 32% | 33% | 82% | 59% | 49% |
| particulate matter PM2.5 (µg/m³) | 74 | — | — | — | — | — |
| Pleasure of spending time in the city | 35% | 32% | 26% | 61% | 52% | 43% |
| particulate matter PM10 (µg/m³) | 136 | — | — | — | — | — |
| Air Pollution | 74% | 76% | 78% | 45% | 53% | 64% |
| Garbage Disposal | 32% | 25% | 22% | 47% | 41% | 34% |
| Availability and quality of drinking water | 48% | 36% | 44% | 64% | 65% | 44% |
| Cleanliness and tidiness | 33% | 27% | 23% | 57% | 52% | 40% |
| Noise and Light pollution | 65% | 55% | 63% | 55% | 50% | 59% |
| Water Pollution | 69% | 76% | 74% | 56% | 57% | 70% |
Air quality in nearby cities
All cities →Bangladesh↗
Jessore
PM2.573.3
PM1074.5
µg/m³
PM2.5 · PoorNO₂ 16.3O₃ 77
November 11, 202608:00
Bangladesh↗
Khulna
PM2.542
PM1044
µg/m³
PM2.5 · ModerateNO₂ 16.6O₃ 71
November 11, 202608:00
Bangladesh↗
Rajshahi
PM2.5101.5
PM10103.6
µg/m³
PM2.5 · Very poorNO₂ 27.1O₃ 69
November 11, 202608:00
Bangladesh↗
Barisāl
PM2.519.4
PM1020.9
µg/m³
PM2.5 · ModerateNO₂ 7.7O₃ 73
November 11, 202608:00
Bangladesh↗
Nāgarpur
PM2.548.2
PM1050.8
µg/m³
PM2.5 · ModerateNO₂ 20.4O₃ 65
November 11, 202608:00
Bangladesh↗
Dhaka
PM2.534
PM1036
µg/m³
PM2.5 · ModerateNO₂ 32.6O₃ 67
November 11, 202608:00
Bangladesh↗
Tongi
PM2.535.6
PM1037.3
µg/m³
PM2.5 · ModerateNO₂ 27.7O₃ 67
November 11, 202608:00
India↗
Patna
PM2.5115.9
PM10122.5
µg/m³
PM2.5 · Very poorNO₂ 23.1O₃ 70
November 11, 202607:30
India · air quality in other cities
WEATHER & SURROUNDINGS
India · weather forecast
Daily maximum and minimum temperatures. Forecast point: 20.5937, 78.9629. Forecast for a country reference point; conditions in the city may differ.
Scroll the forecast to see the following days.
India · November 8, 2026: minimum temperature 19.7°C, maximum 31.5°C. Wind: 11.2 km/h. Humidity: 49%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-11-08 | 24.9 | 19.7 | 31.5 | 22.2 | — | 3.1 | 49 | 2 |
| 2026-11-09 | 24.3 | 19.2 | 30.6 | 21.6 | — | 3.2 | 50 | 37 |
| 2026-11-10 | 24.3 | 18.4 | 31.2 | 20 | — | 2.9 | 49 | 3 |
| 2026-11-11 | 26.5 | 17.2 | 30 | 20.9 | — | 2.6 | 38 | 35 |
| 2026-11-12 | 26.7 | 17.2 | 30 | 20.1 | — | 3.5 | 39 | 1 |
| 2026-11-13 | 28.1 | 16.6 | 30.3 | 19.8 | — | 3.6 | 36 | 3 |
| 2026-11-14 | 28.3 | 17.4 | 30.8 | 20.9 | — | 2.9 | 38 | 5 |
| 2026-11-15 | 29.1 | 18.4 | 30.8 | 21.9 | — | 2.1 | 37 | 71 |
| 2026-11-16 | 28.5 | 19.7 | 29.8 | 22.1 | — | 1.6 | 36 | 96 |
| 2026-11-17 | 29.8 | 19.5 | 32 | 22.1 | — | 2.5 | 35 | 62 |
| 2026-11-18 | 29.8 | 18.8 | 31.6 | 20.2 | — | 3.6 | 33 | 45 |
| 2026-11-19 | 28.6 | 17.1 | 31.1 | 17.9 | 9.1 | 4 | 23 | 5 |
| 2026-11-20 | 26.8 | 15 | 29.3 | 17.9 | 2 | 3.6 | 28 | 21 |
| 2026-11-21 | 26.9 | 14.6 | 29.3 | 18.9 | 25.3 | 3.4 | 27 | 1 |
| 2026-11-22 | 27.3 | 15.2 | 29.7 | 18.8 | 0.5 | 3 | 25 | 10 |
| 2026-11-23 | 27.9 | 15.6 | 30.2 | 19.3 | 0.2 | 3.2 | 24 | 46 |
| 2026-11-24 | 27.1 | 15.7 | 29.2 | 20.7 | 5.7 | 3.3 | 30 | 100 |
| 2026-11-25 | 27.8 | 17.4 | 29.8 | 19.5 | — | 5.3 | 33 | 97 |
UV index by day · India
Data for a country reference point. Local conditions may differ.
SPF 30-50, hat and sunglasses are a must. Better to stay in the shade 11:00-15:00.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
India · November 10, 2026: UV index: 6.5 .
| Indicator | 2026-11-10 | 2026-11-11 | 2026-11-12 | 2026-11-13 | 2026-11-14 | 2026-11-15 | 2026-11-16 | 2026-11-17 | 2026-11-18 | 2026-11-19 | 2026-11-20 | 2026-11-21 | 2026-11-22 | 2026-11-23 | 2026-11-24 | 2026-11-25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 6.5 | 6.5 | 6.5 | 6.5 | 6.4 | 5.9 | 4.5 | 6.4 | 6.4 | 6.3 | 6.4 | 6.3 | 6.3 | 6.2 | 5 | — |
AIR QUALITY QUESTIONS
Kolkata · air pollution - questions and answers
What do the latest air quality data show for Kolkata?
Kolkata - latest available concentrations (November 11, 2026, 07:30 local time): PM2.5: 84.3 µg/m³, PM10: 85.2 µg/m³, O₃: 82 µg/m³, NO₂: 27.1 µg/m³, SO₂: 38.4 µg/m³, CO: 938 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Kolkata over the past week?
The highest available daily mean PM2.5 was 132.6 µg/m³ (November 7, 2026). This comparison covers 7 days with data in the seven days before November 11, 2026. The day of the latest reading is excluded because it may be incomplete.
What period does the pollution history for Kolkata cover?
Available monthly means cover 2015-12 - 2020-05. The tables include PM2.5, PM10, O₃, NO₂, SO₂, CO. Missing values are marked with a dash, not treated as zero. Monthly archives and current model data may come from different sources.
Is the PM2.5 concentration for Kolkata an AQI score?
No. PM2.5 and PM10 are concentrations in µg/m³. AQI is a separate index calculated using a defined scale. When comparing air quality, also check other pollutants, the date and the averaging period.
What UV index does the available forecast show for Kolkata?
For November 10, 2026, the forecast UV index is 6.5. The UV section also shows the following available days. The forecast is for a country reference point (India), not the city itself.
What wind speed is forecast for Kolkata?
For November 8, 2026, forecast wind speed is 11.2 km/h. The weather table includes wind, temperature and other available parameters for subsequent days. These data describe a country reference point (India); local wind may differ.
PM2.5 · PM10 · NO₂ · O₃
Understanding air quality and pollution data
What do PM2.5 and PM10 mean?
PM2.5 and PM10 are fractions of airborne particulate matter. PM2.5 covers fine particles up to 2.5 micrometres in diameter, while PM10 covers particles up to 10 micrometres. Concentrations in µg/m³ tell you how many micrograms of particles are present in a cubic metre of air. Compare values over the same time period.
Where does the air pollution data come from?
The latest concentrations come from the CAMS atmospheric model via Open-Meteo for each city’s coordinates. Values describe a model area, so conditions on individual streets may differ. Historical monitoring station data is shown separately where available.
How does PM2.5 concentration differ from AQI?
PM2.5 is the concentration of one particle fraction, expressed in µg/m³. AQI is an index calculated using a particular scale and thresholds. The pollutant cards show concentrations. Our city ranking compares PM2.5; PM10, ozone, nitrogen dioxide and other available gases add to the picture of air quality.
Which dates do the values and charts cover?
Each current value has a data date and time. Current concentration cards show the latest available hour, daily charts summarise individual days, and monthly records let you compare longer periods. These values represent different time intervals.
How can I check pollution in my city?
Search for your city and open its air quality page. Start with PM2.5 and PM10, then check the other available pollutants and the data timestamp. Charts and tables help you compare concentrations over time. Weather and historical climate information complement the pollution data.