2. Among the definition 1, area of the Yodo-gawa water system (which water could end up in Osaka Bay through the Yodo-gawa River) which includes Nantan City (excluding former Miyama Town, Kyoto Prefecture), Kameoka City, Kyoto City, Muko City, Nagaokakyo City, Otokuni County, Uji City, Joyo City, Kuse County, Yawata City, Kyotanabe City, Tsuzuki County and Sora County.
1のうち淀川水系（水を流せば淀川を通じ大阪湾に流れる地域）の南丹市（旧美山町(京都府)を除く）、亀岡市、京都市、向日市、長岡京市、乙訓郡、宇治市、城陽市、久世郡、八幡市、京田辺市、綴喜郡、相楽郡。