Due to the COVID-19 pandemic and Shelter in Place Order, our office is closed to the public.  Behind the scenes our operations will continue.  Our staff is committed to the continual delivery of safe and high quality water.  See answers to frequently asked questions here.

Water Supply

Diablo Water District has two sources of water:

  • Local Groundwater (20% of water supply)
    • Sustainable pumped to match normal recharge rates
  • Delta Water (80% of water supply)
    • Source of water originates in the Trinity, Sacramento, American and San Joaquin Rivers Watershed

Click map for full size image.