Average concentrations of atmospheric air pollutants in study communities
| NO2 (ppm) | SO2 (ppm) | PM10 (μg/m3) | ||||
|---|---|---|---|---|---|---|
| 10 year* | 1994† | 10 year* | 1994† | 10 year* | 1994† | |
| *The average concentrations of air pollutants for the 10 year period 1986–95, measured at ambient air monitoring stations near the study school; †annual mean concentrations of air pollutants in 1994; ‡the concentration of PM10 in Miyazaki was estimated from the concentrations measured in the adjacent cities. | ||||||
| Osaka | 0.034 | 0.033 | 0.008 | 0.007 | 45 | 44 |
| Kimitsu | 0.018 | 0.019 | 0.006 | 0.007 | 37 | 38 |
| Obitsu | 0.011 | 0.010 | 0.004 | 0.004 | 34 | 33 |
| Miyazaki | 0.007 | 0.007 | 0.003 | 0.003 | 28‡ | 28‡ |