Air quality in San Juan today
Puerto Rico · Updated Friday 07:00 (local time) · Model data from the Copernicus Atmosphere Monitoring Service
Good European AQI
Clean air. A great time to be outside.
Pollutants right now
| Pollutant | Value | Level |
|---|---|---|
| PM2.5 | 5 µg/m³ | Good |
| PM10 | 7 µg/m³ | Good |
| NO₂ | 1 µg/m³ | Good |
| O₃ | 37 µg/m³ | Good |
The pollutant that matters most in San Juan right now is O₃.
Forecast: next 24 hours
Over the next 24 hours the air in San Juan is expected to be worst around Fri 22:00 (AQI 43, moderate). The cleanest hour is expected around Fri 08:00.
| Time | AQI | Level | PM2.5 |
|---|---|---|---|
| Fri 08:00 | 22 | Fair | 6 |
| Fri 11:00 | 23 | Fair | 7 |
| Fri 14:00 | 28 | Fair | 9 |
| Fri 17:00 | 38 | Fair | 14 |
| Fri 20:00 | 42 | Moderate | 18 |
| Fri 23:00 | 43 | Moderate | 19 |
| Sat 02:00 | 41 | Moderate | 17 |
| Sat 05:00 | 37 | Fair | 13 |
The last 30 days
Over the last 30 days the average daily AQI in San Juan was 22, with 1 day(s) rated poor or worse. The cleanest day was 23 Sept, the most polluted 12 Sept.
Questions and answers
- Is the air in San Juan good today?
- Right now the European Air Quality Index in San Juan is 20, which is good. Clean air. A great time to be outside.
- What pollutes the air in San Juan?
- At the moment O₃ contributes most to the air quality index in San Juan. The index takes the worst of fine particles (PM2.5), coarser particles (PM10), nitrogen dioxide, ozone and sulphur dioxide.
- When will the air in San Juan be cleanest?
- Over the next 24 hours the air in San Juan is expected to be worst around Fri 22:00 (AQI 43, moderate). The cleanest hour is expected around Fri 08:00.
- Where does this data come from?
- Wheezair shows model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), served by Open-Meteo: about 11 km resolution in Europe and 40 km elsewhere, updated daily. They are not station measurements, so a busy street can be worse than its city's value.