Kolkata air quality now

India · The summary is refreshed every 15 minutes.

Now

No current value: fewer than four sensors at different places are reporting now.

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Open methodology and data in JSON: Methodology and data sources · JSON

There are not enough fresh measurements for Kolkata right now. From 14:30 to 22:30 local time the city mean PM2.5 rose from 23.7 to 39.7 µg/m³.

Light wind (1 m/s) in the evening or at night, as the air cools, possibly traps particles near the ground (a temperature inversion). High humidity (87%) possibly makes optical sensors read somewhat higher.

Weather now: clear, 24°C, wind 1 m/s, humidity 87%. No major change in the wind is expected in the coming hours. By 14:00 the temperature will be about 29°C.

Written automatically at 02:43 local time (21:13 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.

1 m/s

Wind, N

0.2 mm

Precipitation today

Pollution accumulation index now

60/100Moderate · An estimate of weather conditions · not a PM2.5 forecast

Now6059
04.0012.0019.0003.00

Pollution accumulation forecast

Today — November 12

29°/23°

Index by time of day

60/100Moderate

  1. 60/100Night
  2. 43/100Morning
  3. 10/100Day
  4. 27/100Evening

Friday — November 13

30°/22°

Index by time of day

60/100Moderate

  1. 60/100Night
  2. 43/100Morning
  3. 10/100Day
  4. 26/100Evening

Saturday — November 14

30°/22°

Index by time of day

62/100Moderate

  1. 62/100Night
  2. 44/100Morning
  3. 10/100Day
  4. 26/100Evening

Sunday — November 15

31°/22°

Index by time of day

58/100Moderate

  1. 58/100Night
  2. 43/100Morning
  3. 8/100Day
  4. 24/100Evening

Monday — November 16

31°/21°

Index by time of day

58/100Moderate

  1. 58/100Night
  2. 42/100Morning
  3. 9/100Day
  4. 26/100Evening

Tuesday — November 17

31°/22°

Index by time of day

57/100Moderate

  1. 57/100Night
  2. 41/100Morning
  3. 9/100Day
  4. 20/100Evening

Forecast of conditions that trap pollution near the surface

Weather

24°

Clear. Feels like 28°C

  1. MorningClear27°C65%
  2. DayClear29°C55%
  3. EveningClear25°C75%

Wind

1m/sWind from the N

2m/sWind gusts

Wind force: 1

Gusts up to 6 m/s are expected.

10-day weather forecast for Kolkata

India

  1. TodayNov 12Rain29°C23°C
  2. FriNov 13Partly cloudy30°C22°C
  3. SatNov 14Partly cloudy30°C22°C
  4. SunNov 15Partly cloudy31°C22°C
  5. MonNov 16Cloudy31°C21°C
  6. TueNov 17Cloudy31°C22°C
  7. WedNov 18Cloudy29°C21°C
  8. ThuNov 19Rain24°C21°C
  9. FriNov 20Rain22°C21°C
  10. SatNov 21Rain25°C21°C

India: sensors in total

14

  1. DelhiIndia

    3

  2. BengaluruIndia

    2

  3. JammuIndia

    2

Cities with the most sensors

All sensors on the map, by city as the map assigns them; the city’s values count only the sensors that pass the Data Hub’s quality check.

Air quality calendar: Kolkata

Daily mean PM2.5 of the city sensors, µg/m³

Click a day to see its date and value.

LowModerateElevatedHighVery highExtremely high

India · City ranking · All pilot cities

Questions

What is the air quality in Kolkata right now?

Fresh data for Kolkata are insufficient (last update: 02:15 local time, 20:45 UTC). Open the map for the latest readings of individual sensors.

Where do these data come from?

From Atmy sensors and connected public networks (citizen, experimental and government monitors), aggregated by Atmy. Values are approximate; see the methodology.

How often is this page updated?

The summary is rebuilt every 15 minutes from the latest reading of each sensor, each no older than one hour.

Data

Where do these data come from?

The daily value is the Data Hub’s: the mean of the city’s sensors that passed the nightly quality check, each with at least 12 valid hours, and only with sensors at four places 500 m apart; days are UTC.

“Now” uses the same sensors and rule: the mean of their latest readings, each at most 60 minutes old, shown only with sensors at four places 500 m apart reporting.

Source: public Atmy monitoring data. Methodology and data sources · Data terms