Nagano air quality · Japan
Clean overnight air is linked to deeper, less interrupted sleep
US AQI 17 (Good) in Nagano, from 5 MOE Japan monitoring stations. Main pollutant: PM2.5.
Updated
Pollutants in Nagano
- PM2.5 · µg/m³3.0Under WHO limit
- NO₂ · µg/m³5.6Under WHO limit
- O₃ · µg/m³54.9
Concentrations averaged across the city's stations. WHO multiples use the 2021 24-hour guidelines.
Is it safe outside in Nagano right now?
Air quality is satisfactory and poses little or no risk.
Walking and commuting
Go aheadEnjoy it.
Running and jogging
Go aheadA great time to run outdoors.
Cycling
Go aheadRide freely.
Children playing outside
Go aheadNo limits.
Older adults and heart or lung conditions
Go aheadNo limits.
Open windows
Go aheadAir out your home.
Mask outdoors
Not neededNot needed.
Air purifier indoors
Not neededNot needed.
Based on the US EPA Air Quality Guide, applied to the current US AQI category. If you have symptoms, follow your doctor's advice.
What US AQI 0–50 means for your health →
Air quality by area in Nagano
5 stations, worst first- 環境保全研究所Good22
- 更埴インターチェンジGood · roadside22
- 篠ノ井Good17
- 豊野Good17
- 吉田Good11
Roadside and industrial monitors are shown but are not part of the city figure.
Nagano air quality history
Daily average, 16 days- 26average daily US AQI over 16 days
- 55worst day, 1 November
- 9cleanest day, 25 October
- 0days at Unhealthy or worse
The last 7 days averaged 21, better than the week before (33). 15 of the last 16 days were Good.
Nearby cities
Japan rankingNagano air quality: common questions
What is the AQI in Nagano right now?
The US AQI in Nagano is 17 (Good), based on 5 monitoring stations. The main pollutant is PM2.5.
Is it safe to go outside in Nagano today?
A great time to be outside. Air quality is satisfactory and poses little or no risk. For runners: A great time to run outdoors.
Which area of Nagano has the worst air right now?
環境保全研究所 has the highest reading at 22 (Good). 吉田 has the lowest at 11, out of 5 stations reporting.
How has air quality in Nagano been recently?
Over the last 16 days with data, Nagano averaged US AQI 26. The worst day was 1 November at 55; the cleanest was 25 October at 9. 0 days were at Unhealthy or worse.
Where does Nagano's air quality data come from?
From Ministry of the Environment, Japan · AEROS (soramame.env.go.jp) · preliminary data, using 5 monitoring stations in and around the city. Good Air does not estimate or adjust these readings.
Source: Ministry of the Environment, Japan · AEROS (soramame.env.go.jp) · preliminary data. Readings are published by the monitoring agency and may be revised.