GlobeMetrics
EN

Try “Pune”, “Poona” or “पुणे”

Air quality · West Bengal

Kolkata AQI today कोलकाता

Updated 3 Nov, 16:21 IST.

86 Satisfactory

Live estimate · modelled (CPCB stations offline)

India’s National AQI (CPCB)15:30 IST, 3 Nov Main pollutant: PM10

Minor breathing discomfort to sensitive people.

Official CPCB bulletin (2 Nov, 4 PM): 81 · Satisfactory · PM10 ↗

Same day last year (2025, CPCB): 58 · Satisfactory

On the US EPA scale: 82 (Moderate)

What to do today

  • Long walk or run outside OK
  • Kids playing outside OK
  • Airing the house Open
  • Mask outdoors Not needed

Based on CPCB’s health statement: “Minor breathing discomfort to sensitive people.” General guidance, not medical advice.

Last 24 hours

16:00 · 84 17:00 · 79 18:00 · 71 19:00 · 64 20:00 · 56 21:00 · 47 22:00 · 37 23:00 · 37 00:00 · 37 01:00 · 37 02:00 · 44 03:00 · 45 04:00 · 45 05:00 · 40 06:00 · 40 07:00 · 39 08:00 · 39 09:00 · 39 10:00 · 40 11:00 · 40 12:00 · 46 13:00 · 59 14:00 · 74 15:00 · 86 Now

Each bar is the city estimate at that hour. Like CPCB, it is a 24-hour average (8 hours for CO and O₃), so the bars move slowly.

Show as a table
TimeAQI
Mon 16:0084
Mon 17:0079
Mon 18:0071
Mon 19:0064
Mon 20:0056
Mon 21:0047
Mon 22:0037
Mon 23:0037
Tue 00:0037
Tue 01:0037
Tue 02:0044
Tue 03:0045
Tue 04:0045
Tue 05:0040
Tue 06:0040
Tue 07:0039
Tue 08:0039
Tue 09:0039
Tue 10:0040
Tue 11:0040
Tue 12:0046
Tue 13:0059
Tue 14:0074
Tue 15:00 · Now86

Pollutants

  • PM2.5 25.6 µg/m³ 43
  • PM10 23.0 µg/m³ 23
  • NO₂ 5.2 µg/m³ 7
  • O₃ 86.0 µg/m³ 86
  • CO 0.31 mg/m³ 15
  • SO₂ 8.9 µg/m³ 11

Modelled for the city (CAMS), not measured: 24-hour averages, 8-hour for CO and O₃, corrected to match CPCB’s recent bulletins.

Last 30 days (official)

Worst: 153 (6 Oct) · Best: 44 (30 Oct)

Last 30 days (official)
4 Oct137 Moderate
6 Oct153 Moderate
7 Oct108 Moderate
8 Oct95 Satisfactory
9 Oct76 Satisfactory
10 Oct106 Moderate
11 Oct107 Moderate
12 Oct103 Moderate
13 Oct101 Moderate
14 Oct96 Satisfactory
15 Oct71 Satisfactory
16 Oct71 Satisfactory
17 Oct75 Satisfactory
18 Oct80 Satisfactory
19 Oct89 Satisfactory
20 Oct95 Satisfactory
21 Oct85 Satisfactory
22 Oct81 Satisfactory
23 Oct91 Satisfactory
24 Oct105 Moderate
25 Oct96 Satisfactory
26 Oct86 Satisfactory
27 Oct81 Satisfactory
28 Oct59 Satisfactory
29 Oct57 Satisfactory
30 Oct44 Good
31 Oct44 Good
1 Nov82 Satisfactory
2 Nov81 Satisfactory

CPCB’s official daily AQI (the 4 PM bulletin, a 24-hour average). CPCB ↗

Where this number comes from

CPCB stopped publishing hourly station data in September 2026, so the live estimate is modelled: CAMS forecast concentrations, averaged over CPCB’s own windows, scored with CPCB’s sub-index and scaled to match this city’s recent bulletins. The 4 PM figure is still CPCB’s own measurement.

Full methodology · Population: Kolkata

Nearby cities

City AQI
Patna Bihar 67
Varanasi Uttar Pradesh 95
Lucknow Uttar Pradesh 160
Kanpur Uttar Pradesh 180
Nagpur Maharashtra 102
Bhopal Madhya Pradesh 108
  • Good 0–50
  • Satisfactory 51–100
  • Moderate 101–200
  • Poor 201–300
  • Very poor 301–400
  • Severe 401–500

Questions

What is Kolkata's AQI right now?
Kolkata's live estimate is 86 (Satisfactory) at 15:30 IST, 3 Nov, modelled while CPCB’s stations are offline. CPCB's official bulletin (2 Nov, 4 PM) was 81 (Satisfactory).

What is the main pollutant in Kolkata today?
PM10, according to CPCB's official bulletin (2 Nov, 4 PM).

Is it OK to go for a walk in Kolkata today?
OK. CPCB's health statement for “Satisfactory”: Minor breathing discomfort to sensitive people. General guidance, not medical advice.

Why do other apps show a different AQI for Kolkata?
Many apps use the US EPA scale, on which the same air scores 82 (Moderate). India's National AQI uses different breakpoints, so the two numbers differ even for identical air.