Tungkang Creek, which skirts the northern edge of the town, serves as the main source for Ch'aochou's water.
發源於潮州東北邊、牛角灣山區的東港溪，則挾著豐沛的水量流過潮州北界。鎮長蔡本仁說：「東港溪的中游經過潮州，溪水部分滲入地下，形成伏流，這就是源頭活水的來歷了，鎮民還因此省了自來水費這項開支。」