345345345345345345424 17 環境微小粒子状物質（PM2.5）微小粒子状物質（PM2.5）微小粒子状物質（PM2.5）有効測定局数二酸化窒素浮遊粒子状物質年度Fiscal year一般環境大気測定局環境基準達成率年度Fiscal year二酸化窒素浮遊粒子状物質一般環境大気測定局年平均濃度年度Fiscal year二酸化窒素浮遊粒子状物質一般環境大気測定局光化学オキシダントPhotochemicaloxidant二酸化硫黄一酸化炭素二酸化硫黄一酸化炭素光化学オキシダントPhotochemicaloxidant(ppm) 2)二酸化硫黄一酸化炭素Suspended particulatematter1,2721,2491,2281,213367362349347Suspended particulatematter99.9100.0100.0100.0100.0100.0100.0100.0Suspended particulatematter(mg/m3)0.0140.0120.0130.0130.0150.0130.0140.014Number of valid measuring stationsSulphur dioxideCarbon monoxideFine particulate matterAmbient air pollution monitoring stations9138948748571,1551,1481,1431,137Roadside air pollution monitoring stations4544414131323131Rate of environmental standard achievements光化学オキシダントPhotochemicaloxidantSulphur dioxideCarbon monoxideFine particulate matterAmbient air pollution monitoring stations99.799.899.599.80.20.20.10.1Roadside air pollution monitoring stations100.0100.0100.0100.00.00.00.00.0Annual average densitySulphur dioxideCarbon monoxideFine particulate matter(ppm)Ambient air pollution monitoring stations0.0460.0470.0460.0470.0010.0010.0010.001Roadside air pollution monitoring stations0.0440.0450.0440.0450.0010.0010.0010.0011177--77 主主なな大大気気汚汚染染物物質質のの環環境境基基準準達達成成率率及及びび年年平平均均濃濃度度（令和２～５年度）Rate of Environmental Standard Achievements and Annual Average Density of Major Air Pollutants (F.Y. 2020 to 2023)Nitrogen dioxide1,2081,1931,1741,151自動車排出ガス測定局374365359357Nitrogen dioxide100.0100.0100.0100.0自動車排出ガス測定局100.0100.0100.0100.0Nitrogen dioxide(ppm)0.0070.0070.0070.007自動車排出ガス測定局0.0140.0140.0130.012令和2年2020202120222023令和2年2020202120222023令和2年2020202120222023令和2年2020202120222023令和2年2020202120222023令和2年20202021202220231) 有効測定局のうち環境基準を達成した局の割合 2) 昼間の日最高１時間値1) The percentage of valid measuring stations where environmental standards are satisfied. 2) Maximum of one-hour valuein the daytime.資料 環境省「大気汚染状況について」Source: Ministry of the Environment.55555351220213213209(%) 1)100.0100.0100.0100.0100.0100.0100.0100.0(ppm)(μg/m3)0.20.30.20.20.30.30.30.384485885586723724023623398.3100.099.9100.098.3100.0100.0100.09.58.38.88.510.08.89.29.1
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