大気汚染予測
空気質データの提供元: the Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム) (soramame.env.go.jp) and the Ibaraki Prefecture EPA (茨城県大気汚染常時監視システム) (taiki.pref.ibaraki.jp)
Note that the measurement for CO (carbon monoxide) are taken from the station: Tanaka, Shimono, Tochigi