Tacoma Water's supply source availability varies throughout the year, depending on season, weather, snowpack, inflows and water storage. The maximum amount of water available by source is shown below. 

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

Supply
 
 Green River
 
 72 millions gallons/day
 7 North Fork wells (alternative Green River supply)
 
 84 million gallons/day
 Local wells
 
 59 million gallons/day max.
 Interruptible Green River supply
 
 27 million gallons/day additional