Personal and Atmospheric Concentrations of Ozone in Southeastern Hyogo Prefecture, Japan

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  • Tang Ning
    Department of Public Health, Hyogo College of Medicine
  • Yoda Yoshiko
    Department of Public Health, Hyogo College of Medicine
  • Otani Naruhito
    Department of Public Health, Hyogo College of Medicine
  • Kameda Takayuki
    Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
  • Toriba Akira
    Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
  • Hayakawa Kazuichi
    Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
  • Shima Masayuki
    Department of Public Health, Hyogo College of Medicine

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Twenty-one data sets composed of readings collected by atmospheric ozone monitors worn by individuals on their clothing and installed outside their home or office were collected using Ogawa passive ozone samplers in southeastern Hyogo prefecture, Japan from September 12 to 13, 2011. The concentrations of personal and outdoor ozone ranged from not detectable to 23.2 ppb and from 4.7 to 38.3 ppb, respectively. The mean concentration of personal exposure to ozone was 3.7 ppb and was significantly lower than that of outdoor ozone (18.5 ppb). This suggests that the concentrations of outdoor ozone affect personal ozone exposure. However, in this study, we found no correlation between the concentrations of personal ozone and the total time spent outdoors or the time of day the individual was outside. In contrast, the mean concentrations of outdoor ozone were similar to those of ozone measured at the 12 nearest Ambient Monitoring Stations (AMSs). However, when the AMS was situated near a main road, the regional ozone levels were underestimated.

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