The storing water situation
About the storing water situation of water source, we can confirm on website of Kanagawa company agency.
In addition, lake which Yokohama-shi assumes water source is Sagamiko, Lake Tsukui, Lake Tanzawa, Lake Miyagase.
The storing water situation (the outside site) in the prefecture (to Kanagawa company agency website)
Inquiry about water supply to Water Works Bureau customer Service Center