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Air quality · Brussels Capital, Belgium

Brussels Air Quality Index (AQI) today

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

61 Moderate

Live estimate · modelled

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

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

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 55.

Over the next 24 hours the model expects the AQI to range from 52 around 13:00 to 62 around 14:00 (3 Nov).

480th most polluted of 849 cities worldwide right now.

What to do today

  • Long walk or run outside OK, lighter if very sensitive
  • Kids playing outside OK
  • Airing the house Open
  • Mask outdoors Not needed

Based on the US EPA’s health statement: “Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

14:00 · 41 15:00 · 36 16:00 · 36 17:00 · 37 18:00 · 46 19:00 · 53 20:00 · 56 21:00 · 58 22:00 · 59 23:00 · 58 00:00 · 57 01:00 · 55 02:00 · 54 03:00 · 53 04:00 · 54 05:00 · 54 06:00 · 54 07:00 · 55 08:00 · 56 09:00 · 58 10:00 · 60 11:00 · 61 12:00 · 61 13:00 · 61 14:00 · 62 15:00 · 62 16:00 · 61 17:00 · 61 18:00 · 61 19:00 · 61 20:00 · 62 21:00 · 62 22:00 · 61 23:00 · 61 00:00 · 60 01:00 · 60 02:00 · 60 03:00 · 60 04:00 · 60 05:00 · 60 06:00 · 60 07:00 · 60 08:00 · 61 09:00 · 61 10:00 · 60 11:00 · 58 12:00 · 55 13:00 · 52 14:00 · 49 15:00 · 46 16:00 · 46 17:00 · 52 18:00 · 54 19:00 · 55 20:00 · 57 21:00 · 57 22:00 · 58 23:00 · 60 00:00 · 60 01:00 · 61 02:00 · 61 03:00 · 62 04:00 · 61 05:00 · 61 06:00 · 61 07:00 · 61 08:00 · 61 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 14:0041
Mon 15:0036
Mon 16:0036
Mon 17:0037
Mon 18:0046
Mon 19:0053
Mon 20:0056
Mon 21:0058
Mon 22:0059
Mon 23:0058
Tue 00:0057
Tue 01:0055
Tue 02:0054
Tue 03:0053
Tue 04:0054
Tue 05:0054
Tue 06:0054
Tue 07:0055
Tue 08:0056
Tue 09:0058
Tue 10:0060
Tue 11:0061
Tue 12:0061
Tue 13:00 · Now61
Tue 14:00 · Forecast62
Tue 15:00 · Forecast62
Tue 16:00 · Forecast61
Tue 17:00 · Forecast61
Tue 18:00 · Forecast61
Tue 19:00 · Forecast61
Tue 20:00 · Forecast62
Tue 21:00 · Forecast62
Tue 22:00 · Forecast61
Tue 23:00 · Forecast61
Wed 00:00 · Forecast60
Wed 01:00 · Forecast60
Wed 02:00 · Forecast60
Wed 03:00 · Forecast60
Wed 04:00 · Forecast60
Wed 05:00 · Forecast60
Wed 06:00 · Forecast60
Wed 07:00 · Forecast60
Wed 08:00 · Forecast61
Wed 09:00 · Forecast61
Wed 10:00 · Forecast60
Wed 11:00 · Forecast58
Wed 12:00 · Forecast55
Wed 13:00 · Forecast52
Wed 14:00 · Forecast49
Wed 15:00 · Forecast46
Wed 16:00 · Forecast46
Wed 17:00 · Forecast52
Wed 18:00 · Forecast54
Wed 19:00 · Forecast55
Wed 20:00 · Forecast57
Wed 21:00 · Forecast57
Wed 22:00 · Forecast58
Wed 23:00 · Forecast60
Thu 00:00 · Forecast60
Thu 01:00 · Forecast61
Thu 02:00 · Forecast61
Thu 03:00 · Forecast62
Thu 04:00 · Forecast61
Thu 05:00 · Forecast61
Thu 06:00 · Forecast61
Thu 07:00 · Forecast61
Thu 08:00 · Forecast61

Pollutants this hour

  • PM2.5 15.1 µg/m³ 24-hour mean 11.5 µg/m³ · within WHO’s 24-hour guideline (15) 61
  • PM10 17 µg/m³ 15
  • O₃ 24 µg/m³ 10
  • NO₂ 21 µg/m³ 10
  • SO₂ 3 µg/m³ 1
  • CO 0.24 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
Rotterdam Netherlands 34
Amsterdam Netherlands 31
Düsseldorf Germany 53
Cologne Germany 44
Paris France 52
Frankfurt am Main Germany 52
London United Kingdom 27

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 Brussels’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 Brussels right now?
61 on the US EPA scale (Moderate) 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 Brussels today?
For most people, yes. The EPA’s statement for “Moderate”: Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. General guidance, not medical advice.

Will the air in Brussels get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 52 around 13:00 to 62 around 14:00 (3 Nov). Forecasts beyond a day are less certain.

How does Brussels compare with other cities?
Right now it is the 480th most polluted of 849 cities we track worldwide, all on the same US EPA scale.

Why does another app show a different AQI for Brussels?
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.