Air quality in San Jose today
United States · Updated Friday 01:00 (local time) · Model data from the Copernicus Atmosphere Monitoring Service
Fair European AQI
Fine for almost everyone.
Pollutants right now
| Pollutant | Value | Level |
|---|---|---|
| PM2.5 | 10 µg/m³ | Fair |
| PM10 | 13 µg/m³ | Good |
| NO₂ | 17 µg/m³ | Good |
| O₃ | 39 µg/m³ | Good |
The pollutant that matters most in San Jose right now is PM2.5.
Forecast: next 24 hours
The air in San Jose should stay good to fair for the next 24 hours. The cleanest hour is expected around Fri 10:00.
| Time | AQI | Level | PM2.5 |
|---|---|---|---|
| Fri 02:00 | 30 | Fair | 10 |
| Fri 05:00 | 26 | Fair | 8 |
| Fri 08:00 | 24 | Fair | 7 |
| Fri 11:00 | 21 | Fair | 5 |
| Fri 14:00 | 36 | Fair | 6 |
| Fri 17:00 | 32 | Fair | 6 |
| Fri 20:00 | 26 | Fair | 8 |
| Fri 23:00 | 24 | Fair | 7 |
The last 30 days
Over the last 30 days the average daily AQI in San Jose was 35, with 0 day(s) rated poor or worse. The cleanest day was 3 Sept, the most polluted 9 Sept.
Questions and answers
- Is the air in San Jose good today?
- Right now the European Air Quality Index in San Jose is 31, which is fair. Fine for almost everyone.
- What pollutes the air in San Jose?
- At the moment PM2.5 contributes most to the air quality index in San Jose. 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 Jose be cleanest?
- The air in San Jose should stay good to fair for the next 24 hours. The cleanest hour is expected around Fri 10:00.
- 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.