Air quality in Nagano today
Japan · Updated Friday 14:00 (local time) · Model data from the Copernicus Atmosphere Monitoring Service
Moderate European AQI
Sensitive people may want to take it easier outdoors.
Pollutants right now
| Pollutant | Value | Level |
|---|---|---|
| PM2.5 | 7 µg/m³ | Good |
| PM10 | 11 µg/m³ | Good |
| NO₂ | 1 µg/m³ | Good |
| O₃ | 107 µg/m³ | Moderate |
The pollutant that matters most in Nagano right now is O₃.
Forecast: next 24 hours
Over the next 24 hours the air in Nagano is expected to be worst around Fri 15:00 (AQI 46, moderate). The cleanest hour is expected around Sat 05:00.
| Time | AQI | Level | PM2.5 |
|---|---|---|---|
| Fri 15:00 | 46 | Moderate | 8 |
| Fri 18:00 | 31 | Fair | 9 |
| Fri 21:00 | 31 | Fair | 11 |
| Sat 00:00 | 30 | Fair | 10 |
| Sat 03:00 | 17 | Good | 4 |
| Sat 06:00 | 16 | Good | 3 |
| Sat 09:00 | 30 | Fair | 6 |
| Sat 12:00 | 35 | Fair | 5 |
The last 30 days
Over the last 30 days the average daily AQI in Nagano was 26, with 0 day(s) rated poor or worse. The cleanest day was 30 Aug, the most polluted 1 Sept.
Questions and answers
- Is the air in Nagano good today?
- Right now the European Air Quality Index in Nagano is 47, which is moderate. Sensitive people may want to take it easier outdoors.
- What pollutes the air in Nagano?
- At the moment O₃ contributes most to the air quality index in Nagano. The index takes the worst of fine particles (PM2.5), coarser particles (PM10), nitrogen dioxide, ozone and sulphur dioxide.
- When will the air in Nagano be cleanest?
- Over the next 24 hours the air in Nagano is expected to be worst around Fri 15:00 (AQI 46, moderate). The cleanest hour is expected around Sat 05:00.
- 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.