Seattle vs Portland
Water hardness comparison — how the two cities differ and what it means for your home.
Seattle
united states
21mg/L
Soft Water
1.47°e
Soft
Base Unit (CaCO3): 21 mg/LLocal Unit
HarderFull Portland data →
Portland
united states
28mg/L
Soft Water
1.96°e
Soft
Base Unit (CaCO3): 28 mg/LLocal Unit
Side-by-Side Impact
| Impact Area | Seattle | Portland |
|---|---|---|
| Limescale buildup | Minimal | Minimal |
| Boiler/heating risk | Low risk | Low risk |
| Dishwasher salt setting | Low setting (1–2) | Low setting (1–2) |
| Skin & hair impact | Low risk | Low risk |
| Detergent usage | Standard dose | Standard dose |
Key Findings
Hardness Difference: 7 mg/L
The difference between Seattle and Portland is relatively small. Both cities fall into the same hardness category and would use similar appliance settings and treatment products.