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Air quality · North Rhine-Westphalia, Germany

Cologne Air Quality Index (AQI) today

Modelled estimate for 13:00 local time (UTC+1), refreshed 3 Nov, 07:52 UTC+0.

44 Good

Live estimate · modelled

US EPA AQI13:00 UTC+1, 3 Nov Main pollutant: PM2.5

Air quality is satisfactory, and air pollution poses little or no risk.

This page uses EPA’s NowCast, which follows the last few hours, as the US government’s AirNow does. On a 24-hour average of particles, as many apps show, it is 67.

Over the next 24 hours the model expects the AQI to range from 31 around 13:00 to 53 around 19:00 (3 Nov).

680th most polluted of 849 cities worldwide right now, 7th of 7 in Germany.

What to do today

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

Based on the US EPA’s health statement: “Air quality is satisfactory, and air pollution poses little or no risk.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

14:00 · 62 15:00 · 64 16:00 · 65 17:00 · 69 18:00 · 72 19:00 · 76 20:00 · 79 21:00 · 81 22:00 · 82 23:00 · 83 00:00 · 82 01:00 · 78 02:00 · 73 03:00 · 68 04:00 · 63 05:00 · 61 06:00 · 61 07:00 · 61 08:00 · 63 09:00 · 63 10:00 · 58 11:00 · 54 12:00 · 50 13:00 · 44 14:00 · 42 15:00 · 41 16:00 · 43 17:00 · 49 18:00 · 52 19:00 · 53 20:00 · 53 21:00 · 53 22:00 · 53 23:00 · 53 00:00 · 52 01:00 · 52 02:00 · 51 03:00 · 49 04:00 · 48 05:00 · 47 06:00 · 47 07:00 · 47 08:00 · 48 09:00 · 47 10:00 · 43 11:00 · 35 12:00 · 33 13:00 · 31 14:00 · 26 15:00 · 25 16:00 · 26 17:00 · 30 18:00 · 37 19:00 · 41 20:00 · 44 21:00 · 49 22:00 · 52 23:00 · 53 00:00 · 53 01:00 · 52 02:00 · 52 03:00 · 51 04:00 · 51 05:00 · 51 06:00 · 52 07:00 · 52 08:00 · 53 Now

US EPA AQI per hour, UTC+1. Particles use EPA’s NowCast (a 12-hour weighted average), ozone and CO an 8-hour average. Lighter bars are the CAMS forecast.

Show as a table
TimeAQI
Mon 14:0062
Mon 15:0064
Mon 16:0065
Mon 17:0069
Mon 18:0072
Mon 19:0076
Mon 20:0079
Mon 21:0081
Mon 22:0082
Mon 23:0083
Tue 00:0082
Tue 01:0078
Tue 02:0073
Tue 03:0068
Tue 04:0063
Tue 05:0061
Tue 06:0061
Tue 07:0061
Tue 08:0063
Tue 09:0063
Tue 10:0058
Tue 11:0054
Tue 12:0050
Tue 13:00 · Now44
Tue 14:00 · Forecast42
Tue 15:00 · Forecast41
Tue 16:00 · Forecast43
Tue 17:00 · Forecast49
Tue 18:00 · Forecast52
Tue 19:00 · Forecast53
Tue 20:00 · Forecast53
Tue 21:00 · Forecast53
Tue 22:00 · Forecast53
Tue 23:00 · Forecast53
Wed 00:00 · Forecast52
Wed 01:00 · Forecast52
Wed 02:00 · Forecast51
Wed 03:00 · Forecast49
Wed 04:00 · Forecast48
Wed 05:00 · Forecast47
Wed 06:00 · Forecast47
Wed 07:00 · Forecast47
Wed 08:00 · Forecast48
Wed 09:00 · Forecast47
Wed 10:00 · Forecast43
Wed 11:00 · Forecast35
Wed 12:00 · Forecast33
Wed 13:00 · Forecast31
Wed 14:00 · Forecast26
Wed 15:00 · Forecast25
Wed 16:00 · Forecast26
Wed 17:00 · Forecast30
Wed 18:00 · Forecast37
Wed 19:00 · Forecast41
Wed 20:00 · Forecast44
Wed 21:00 · Forecast49
Wed 22:00 · Forecast52
Wed 23:00 · Forecast53
Thu 00:00 · Forecast53
Thu 01:00 · Forecast52
Thu 02:00 · Forecast52
Thu 03:00 · Forecast51
Thu 04:00 · Forecast51
Thu 05:00 · Forecast51
Thu 06:00 · Forecast52
Thu 07:00 · Forecast52
Thu 08:00 · Forecast53

Pollutants this hour

  • PM2.5 6.9 µg/m³ 24-hour mean 17.8 µg/m³ · 1.2× WHO’s 24-hour guideline (15) 44
  • PM10 9 µg/m³ 8
  • O₃ 57 µg/m³ 12
  • NO₂ 7 µg/m³ 3
  • SO₂ 1 µg/m³ 0
  • CO 0.17 mg/m³ 1

Modelled concentrations at the city’s location (CAMS). The sub-index uses the same averaging as the headline, so the highest one is the AQI.

Nearby cities

City AQI
Düsseldorf North Rhine-Westphalia 53
Frankfurt am Main Hesse 52
Brussels Belgium 61
Rotterdam Netherlands 34
Amsterdam Netherlands 31
Stuttgart Baden-Wurttemberg 55
Hamburg Hamburg 53

Where this number comes from

The Copernicus Atmosphere Monitoring Service (CAMS) forecasts air pollution worldwide on a grid (about 11 km over Europe, about 45 km elsewhere). We take the grid value at Cologne’s coordinates and score it with the US EPA’s method. It is a model, not a measurement: a nearby monitoring station can read quite differently, especially next to busy roads or during fires and dust storms.

Full methodology · Data: CAMS via Open-Meteo (CC BY 4.0); city list: GeoNames (CC BY 4.0).

  • Good 0–50
  • Moderate 51–100
  • Unhealthy for sensitive groups 101–150
  • Unhealthy 151–200
  • Very unhealthy 201–300
  • Hazardous 301–500

Questions

What is the AQI in Cologne right now?
44 on the US EPA scale (Good) at 13:00 UTC+1, 3 Nov. PM2.5 is the pollutant with the highest sub-index. This is a modelled estimate from the Copernicus Atmosphere Monitoring Service (CAMS), not a reading from a monitoring station.

Is it safe to exercise outside in Cologne today?
For most people, yes. The EPA’s statement for “Good”: Air quality is satisfactory, and air pollution poses little or no risk. General guidance, not medical advice.

Will the air in Cologne get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 31 around 13:00 to 53 around 19:00 (3 Nov). Forecasts beyond a day are less certain.

How does Cologne compare with other cities?
Right now it is the 680th most polluted of 849 cities we track worldwide, and 7th of 7 in Germany, all on the same US EPA scale.

Why does another app show a different AQI for Cologne?
Apps differ in source (government stations, low-cost sensors or a model like this one), in scale (US EPA, European, or a national index) and in averaging (hourly or NowCast, 8-hour, 24-hour). This page uses the US EPA AQI with EPA’s NowCast for particles, computed from the CAMS forecast for the city’s location.