Bozisongjia water source in Penglai city is a rare chapped-fallen basin with complicated hydro-geological condition.Permitting exploitation amount in this area is 6 051 m~3/d. Main stratum for exploiting underground water are composed of basalt and marble rock. Due to good quality, great quantity from the single well and high guarantee degree for supplying water, it is very convenient toexploit and supply water in city.