Air quality
Air quality in Brazzaville today
Updated
Moderate (US AQI 81) Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. Model estimate for Mon, Oct 26, 3:00 am (02:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Brazzaville, Republic of the Congo, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 81 Moderate
- PM2.5
- 22 µg/m³ 1.5× WHO 24-h guideline
- PM10
- 23 µg/m³
- Ozone
- 28 µg/m³
- Dominant pollutant
- PM2.5 sub-index 81
- Best hour today
- 12:00 pm AQI 75
- European AQI
- 44
Air quality in Brazzaville right now
Right now the modelled US Air Quality Index for Brazzaville, Republic of the Congo is 81, which falls in the "Moderate" band (up to 100). Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors.
The index is driven mainly by PM2.5, whose own sub-index is 81. Fine and coarse particles come from traffic, heating, industry, dust and smoke; they build up on calm nights and clear when wind or rain arrives.
PM2.5 is 22 µg/m³, 1.5 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 23 µg/m³ against a guideline of 45; ozone is 28 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 8.3 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 410 µg/m³.
NASA FIRMS shows 56 fire hotspots within 300 km in the last day (nearest about 38 km), but particle levels are not elevated enough to point to smoke right now.
Brazzaville AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 75 around Mon 12:00 pm to 81 around Mon 3:00 am, staying "Moderate" throughout.
The following day looks similar, averaging about 72.
| Local time (Africa/Brazzaville) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 3:00 am | 81 | Moderate | 21.8 | 23 | 28 |
| Mon 6:00 am | 79 | Moderate | 22.1 | 23 | 37 |
| Mon 9:00 am | 77 | Moderate | 18.6 | 20 | 88 |
| Mon 12:00 pm | 75 | Moderate | 19.4 | 21 | 121 |
| Mon 3:00 pm | 75 | Moderate | 20.8 | 22 | 133 |
| Mon 6:00 pm | 76 | Moderate | 24.1 | 25 | 106 |
| Mon 9:00 pm | 76 | Moderate | 32.1 | 33 | 76 |
| Tue 12:00 am | 77 | Moderate | 19 | 20 | 65 |
| Tue 3:00 am | 75 | Moderate | 15.6 | 16 | 55 |
| Tue 6:00 am | 74 | Moderate | 19.3 | 20 | 58 |
| Tue 9:00 am | 74 | Moderate | 16.4 | 18 | 89 |
| Tue 12:00 pm | 73 | Moderate | 17.9 | 19 | 115 |
| Tue 3:00 pm | 73 | Moderate | 19 | 20 | 125 |
| Tue 6:00 pm | 72 | Moderate | 20.3 | 21 | 95 |
| Tue 9:00 pm | 71 | Moderate | 27.3 | 28 | 60 |
| Wed 12:00 am | 70 | Moderate | 15.1 | 16 | 54 |
| Wed 3:00 am | 69 | Moderate | 12.7 | 13 | 50 |
Every third hour of the CAMS forecast via Open-Meteo. US AQI uses rolling averages (24 h for particles, 8 h for ozone), so it moves more slowly than the hourly concentrations.
Best time to be outside in Brazzaville today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 12:00 pm (AQI 75, Moderate) and the worst around 6:00 am (AQI 79). The difference across the day is small, so timing matters little.
Brazzaville vs the rest of Republic of the Congo
Across 2 Republic of the Congo cities we track, the average US AQI right now is 75 (Moderate). Brazzaville at 81 is 6 points worse than average.
It ranks 2 of 2 from cleanest to most polluted; the cleanest is Pointe-Noire (66) and the most polluted Brazzaville (83).
For context, the median across 3,556 cities worldwide is 58.
Air quality in cities near Brazzaville
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Kinshasa | 8 km | 83 | Moderate | 20.8 |
| Masina | 18 km | 83 | Moderate | 20.8 |
| Matadi | 267 km | 54 | Moderate | 8.4 |
| Boma | 303 km | 61 | Moderate | 10.4 |
| Cabinda | 371 km | 64 | Moderate | 13.2 |
| Uíge | 372 km | 53 | Moderate | 3 |
| Pointe-Noire | 383 km | 66 | Moderate | 14.9 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Brazzaville, so the numbers on this page are model estimates. Models capture regional pollution well but can miss very local sources such as a busy road or a nearby fire.
Advice for sensitive groups
At 81, most people are fine outdoors. If you are unusually sensitive to PM2.5, keep long or intense workouts to the cleaner hours shown above.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for Brazzaville
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.