Water Source

The source of our water supply varies throughout the year, depending on the season, weather, snowpack level, inflows and water storage conditions.

Our average available supply is 110 million gallons per day. The average use is 55 million gallons per day.

The maximum amount of water available by source is shown below.

  • Green River – 72 million gallons per day
  • 7 North Fork wells (alternative Green River supply) – 84 million gallons per day
  • Local wells – 59 million gallons per day
  • Interruptible Green River supply – 27 million gallons per day

Water Supply Conditions as of September 6, 2019 

Enough water is expected for people and fish this summer and into fall, even though some parts of Washington State are experiencing drought conditions. Natural flows into the upper Green River have been near the third lowest on record in over 50 years due to a dry spring and early snowmelt however, our raw water reservoir refilled completely this spring. We have experienced a relatively moist summer, with generally mild temperatures. We encourage you to consider the environment and continue using water wisely.

To learn more about your water supply, see the following pages: