The primary source for water in Tacoma is the Green River (data listed here). The water may be supplemented with well water when needed, or if the Green River exceeds turbidity limits.
Data source(s):
| Average | |
|---|---|
| Calcium (Ca+2) | |
| Magnesium (Mg+2) | |
| Bicarbonate (HCO3-1) | |
| Chloride (Cl-1) | |
| Sodium (Na+1) | |
| Sulfate (SO4-2) |