Korea, South Browse regions with water & wastewater management location pages. Busan 1 cities Chungbuk 6 cities Chungnam 9 cities Daegu 1 cities Daejeon 1 cities Gangwon 8 cities Gwangju 1 cities Gyeongbuk 15 cities Gyeonggi 29 cities Gyeongnam 8 cities Incheon 1 cities Jeju 4 cities Jeonbuk 5 cities Jeonnam 7 cities Sejong 1 cities Seoul 1 cities Ulsan 4 cities