83d3eaef__PM2_5_Air_Quality_Index__AQI___Health_Implications
[AQI] 51 -100 [Air Pollution Level] Moderate [Health Implications] 
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
Yashio, Shinagawa, Tokyo, Japan Air Pollution: Real-time PM2.5 Air Quality Index (AQI)
Health Implications