Air quality
Air quality in Nouadhibou today
Updated
Unhealthy (US AQI 168) Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. Model estimate for Mon, Oct 26, 12:00 am (00:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Nouadhibou, Dakhlet Nouadhibou, Mauritania, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 168 Unhealthy
- PM2.5
- 58 µg/m³ 3.9× WHO 24-h guideline
- PM10
- 134 µg/m³
- Ozone
- 25 µg/m³
- Dominant pollutant
- PM2.5 sub-index 168
- Best hour today
- 9:00 pm AQI 135
- European AQI
- 64
Air quality in Nouadhibou right now
Right now the modelled US Air Quality Index for Nouadhibou, Dakhlet Nouadhibou, Mauritania is 168, which falls in the "Unhealthy" band (up to 200). Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed.
The index is driven mainly by PM2.5, whose own sub-index is 168. 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 58 µg/m³, 3.9 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 134 µg/m³ against a guideline of 45; ozone is 25 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 1.1 µg/m³ (below the 24-hour guideline of 25).
Also this hour: desert dust at 131 µg/m³, high enough to haze the sky, carbon monoxide 112 µg/m³.
Nouadhibou AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 135 around Mon 9:00 pm to 168 around Mon 12:00 am, from "Unhealthy for Sensitive Groups" at best to "Unhealthy" at worst.
The following day is expected to be cleaner, averaging about 126 against 152 for the next 24 hours.
| Local time (Africa/Nouakchott) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 12:00 am | 168 | Unhealthy | 58.4 | 134 | 25 |
| Mon 3:00 am | 166 | Unhealthy | 57.7 | 140 | 24 |
| Mon 6:00 am | 161 | Unhealthy | 49.9 | 138 | 21 |
| Mon 9:00 am | 156 | Unhealthy | 44 | 143 | 28 |
| Mon 12:00 pm | 152 | Unhealthy | 42.8 | 150 | 40 |
| Mon 3:00 pm | 146 | Unhealthy for Sensitive Groups | 44.6 | 201 | 46 |
| Mon 6:00 pm | 140 | Unhealthy for Sensitive Groups | 46.2 | 177 | 41 |
| Mon 9:00 pm | 135 | Unhealthy for Sensitive Groups | 52 | 144 | 34 |
| Tue 12:00 am | 135 | Unhealthy for Sensitive Groups | 56.8 | 155 | 35 |
| Tue 3:00 am | 134 | Unhealthy for Sensitive Groups | 53.2 | 146 | 34 |
| Tue 6:00 am | 132 | Unhealthy for Sensitive Groups | 42.3 | 120 | 29 |
| Tue 9:00 am | 130 | Unhealthy for Sensitive Groups | 36 | 119 | 31 |
| Tue 12:00 pm | 127 | Unhealthy for Sensitive Groups | 32.1 | 103 | 44 |
| Tue 3:00 pm | 123 | Unhealthy for Sensitive Groups | 30.2 | 122 | 55 |
| Tue 6:00 pm | 119 | Unhealthy for Sensitive Groups | 34.5 | 139 | 54 |
| Tue 9:00 pm | 114 | Unhealthy for Sensitive Groups | 27 | 86 | 43 |
| Wed 12:00 am | 106 | Unhealthy for Sensitive Groups | 30.6 | 111 | 39 |
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 Nouadhibou today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 9:00 pm (AQI 135, Unhealthy for Sensitive Groups) and the worst around 6:00 am (AQI 161). That is a swing of 26 points, so a run or walk around 9:00 pm is noticeably better.
Air quality in cities near Nouadhibou
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Nouakchott | 336 km | 151 | Unhealthy | 61.2 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Nouadhibou, 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 168, children, older adults, pregnant people and anyone with asthma, COPD or heart disease should limit time outdoors, especially strenuous activity. A well-fitted N95/FFP2 mask cuts particle exposure; it does not filter ozone.
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 Nouadhibou
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).