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.
| 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|