The Deroche water system service area was established in 1992 by the Dewdney-Alouette Regional District (DARD), and later became a Fraser Valley Regional District service area after amalgamation. The water system serves the community of Deroche, in Electoral Area G. The system was originally operated as a private water system under a Certificate of Public Convenience and Necessity, and was taken over by DARD in 1993. At that time, Deroche Creek was used as the source, but several debris flow incidents within the watershed severely affected the creek, causing interruptions of supply as well as several water quality challenges for the system. As a result, in 1999-2000 several upgrades to the system were carried out. The system was changed over to a groundwater well source, dramatically improving water quality and supply reliability.

Currently, there are approximately 42 customer accounts in this water service area. In addition to the well, there is a 325-m3 reservoir that provides storage for the system.