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Air quality · Estuaire, Gabon

Libreville Air Quality Index (AQI) today

Modelled estimate for 14:00 local time (UTC+1), refreshed 3 Nov, 07:52 UTC+0.

29 Good

Live estimate · modelled

US EPA AQI14:00 UTC+1, 3 Nov Main pollutant: O₃

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 36.

Over the next 24 hours the model expects the AQI to range from 24 around 11:00 to 53 around 22:00 (3 Nov).

791st most polluted of 849 cities worldwide right now.

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

15:00 · 50 16:00 · 49 17:00 · 47 18:00 · 44 19:00 · 43 20:00 · 43 21:00 · 44 22:00 · 47 23:00 · 48 00:00 · 46 01:00 · 43 02:00 · 38 03:00 · 32 04:00 · 31 05:00 · 27 06:00 · 28 07:00 · 31 08:00 · 33 09:00 · 33 10:00 · 32 11:00 · 30 12:00 · 29 13:00 · 27 14:00 · 29 15:00 · 30 16:00 · 31 17:00 · 30 18:00 · 31 19:00 · 37 20:00 · 44 21:00 · 50 22:00 · 53 23:00 · 53 00:00 · 52 01:00 · 50 02:00 · 46 03:00 · 42 04:00 · 40 05:00 · 32 06:00 · 28 07:00 · 30 08:00 · 31 09:00 · 29 10:00 · 26 11:00 · 24 12:00 · 25 13:00 · 28 14:00 · 31 15:00 · 32 16:00 · 30 17:00 · 31 18:00 · 30 19:00 · 37 20:00 · 47 21:00 · 56 22:00 · 63 23:00 · 64 00:00 · 59 01:00 · 55 02:00 · 42 03:00 · 35 04:00 · 32 05:00 · 28 06:00 · 27 07:00 · 31 08:00 · 33 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 15:0050
Mon 16:0049
Mon 17:0047
Mon 18:0044
Mon 19:0043
Mon 20:0043
Mon 21:0044
Mon 22:0047
Mon 23:0048
Tue 00:0046
Tue 01:0043
Tue 02:0038
Tue 03:0032
Tue 04:0031
Tue 05:0027
Tue 06:0028
Tue 07:0031
Tue 08:0033
Tue 09:0033
Tue 10:0032
Tue 11:0030
Tue 12:0029
Tue 13:0027
Tue 14:00 · Now29
Tue 15:00 · Forecast30
Tue 16:00 · Forecast31
Tue 17:00 · Forecast30
Tue 18:00 · Forecast31
Tue 19:00 · Forecast37
Tue 20:00 · Forecast44
Tue 21:00 · Forecast50
Tue 22:00 · Forecast53
Tue 23:00 · Forecast53
Wed 00:00 · Forecast52
Wed 01:00 · Forecast50
Wed 02:00 · Forecast46
Wed 03:00 · Forecast42
Wed 04:00 · Forecast40
Wed 05:00 · Forecast32
Wed 06:00 · Forecast28
Wed 07:00 · Forecast30
Wed 08:00 · Forecast31
Wed 09:00 · Forecast29
Wed 10:00 · Forecast26
Wed 11:00 · Forecast24
Wed 12:00 · Forecast25
Wed 13:00 · Forecast28
Wed 14:00 · Forecast31
Wed 15:00 · Forecast32
Wed 16:00 · Forecast30
Wed 17:00 · Forecast31
Wed 18:00 · Forecast30
Wed 19:00 · Forecast37
Wed 20:00 · Forecast47
Wed 21:00 · Forecast56
Wed 22:00 · Forecast63
Wed 23:00 · Forecast64
Thu 00:00 · Forecast59
Thu 01:00 · Forecast55
Thu 02:00 · Forecast42
Thu 03:00 · Forecast35
Thu 04:00 · Forecast32
Thu 05:00 · Forecast28
Thu 06:00 · Forecast27
Thu 07:00 · Forecast31
Thu 08:00 · Forecast33

Pollutants this hour

  • PM2.5 4.5 µg/m³ 24-hour mean 6.5 µg/m³ · within WHO’s 24-hour guideline (15) 26
  • PM10 6 µg/m³ 5
  • O₃ 66 µg/m³ 29
  • NO₂ 1 µg/m³ 0
  • SO₂ 1 µg/m³ 0
  • CO 0.22 mg/m³ 2

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
Bata Equatorial Guinea 29
Ciudad de la Paz Equatorial Guinea 57
Douala Cameroon 52
Yaoundé Cameroon 67
Port Harcourt Nigeria 55
Aba Nigeria 62
Pointe-Noire Congo 41

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 Libreville’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 Libreville right now?
29 on the US EPA scale (Good) at 14:00 UTC+1, 3 Nov. O₃ 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 Libreville 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 Libreville get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 24 around 11:00 to 53 around 22:00 (3 Nov). Forecasts beyond a day are less certain.

How does Libreville compare with other cities?
Right now it is the 791st most polluted of 849 cities we track worldwide, all on the same US EPA scale.

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