333333406 17 環境70575555258232220213100.0100.0100.0100.0100.0100.0100.0100.0(ppm)(μg/m3)0.30.30.20.30.50.40.30.33476584485812219237240(%) 1)微小粒子状物質32.474.598.3100.08.358.498.3100.015.113.19.58.317.213.910.08.8有効測定局数二酸化窒素浮遊粒子状物質年度一一般般環環境境大大気気測測定定局局自自動動車車排排出出ガガスス測測定定局局環境基準達成率年度二酸化窒素浮遊粒子状物質一一般般環環境境大大気気測測定定局局自自動動車車排排出出ガガスス測測定定局局年平均濃度二酸化窒素浮遊粒子状物質年度一一般般環環境境大大気気測測定定局局自自動動車車排排出出ガガスス測測定定局局二酸化硫黄一酸化炭素光化学二酸化硫黄一酸化炭素二酸化硫黄一酸化炭素光化学微小粒子状物質（PM2.5）（PM2.5）微小粒子状物質（PM2.5） 有効測定局は、環境基準適用局のうち年間測定時間が6,000時間以上（光化学オキシダントを除く）の測定局をいい、微小粒子状物質の有効測定局は、測定している機器が標準測定法と等価性のあるもので、かつ年間測定日数が250日以上の測定局をいう。 "Valid measuring station" refers to a measuring station which measured 6,000 hours or more (except for the case ofphotochemical oxidant) in the respective year. A valid measuring station for fine particulate matters refers to a measuringstation which is equipped with a measuring instrument of equivalent capability to the standard measurement method andwhich measured 250 days or more in the respective year.平成22年20102015令和2年2020202127平成22年20102015令和2年2020202127平成22年20102015令和2年2020202127平成22年20102015令和2年2020202127平成22年20102015令和2年2020202127平成22年20102015令和2年20202021271) 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」1177--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（平成22年度～令和３年度）Rate of Environmental Standard Achievements and Annual Average Density of Major Air Pollutants (F.Y. 2010 to 2021)Fiscal yearFiscal yearFiscal yearNitrogen dioxide1,3321,2531,2081,193416402374365Nitrogen dioxide100.0100.0100.0100.097.899.8100.0100.0Nitrogen dioxide(ppm)0.0110.0100.0070.0070.0220.0190.0140.014Suspended particulatematter1,3741,3021,2721,249399393367362Suspended particulatematter93.099.699.9100.093.099.7100.0100.0Suspended particulatematter(mg/m3)0.0210.0190.0140.0120.0230.0200.0150.013Source: Ministry of the Environment.オキシダントPhotochemicalオキシダントPhotochemicalオキシダントPhotochemicalNumber of valid measuring stationsSulfur dioxideCarbon monoxideFine particulate matteroxidantAmbient air pollution monitoring stations1,1149749138941,1441,1441,1551,148Roadside air pollution monitoring stations6851454433293132Rate of environmental standard achievements光化学oxidantSulfur dioxideCarbon monoxideFine particulate matterAmbient air pollution monitoring stations0.00.00.20.299.799.999.799.8Roadside air pollution monitoring stations0.00.00.00.0100.0100.0100.0100.0Annual average densitySulfur dioxideCarbon monoxideFine particulate matteroxidant(ppm) 2)(ppm)Ambient air pollution monitoring stations0.0480.0480.0460.0470.0030.0020.0010.001Roadside air pollution monitoring stations0.0430.0440.0440.0450.0030.0020.0010.001
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