Water hardness in Eugene
1 gpg soft
Tap water in Eugene is soft: 1 gpg (17 mg/L · 1 °dH · 1.7 °fH).
Source: EWEB 2025 Water Testing Results (testing summary) (2025) · data checked 2026-10-19
Range across supply zones: 16–18 mg/L.
EWEB's 2025 testing summary lists hardness as CaCO3 at an average of 17 mg/L (1.0 gpg), with a range of 16 to 18 mg/L. Samples are finished water at the entry point to the distribution system. The supply is very soft, so scale is negligible and a softener adds nothing for hardness.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 1 gpg |
|---|---|
| Utility | Eugene Water & Electric Board (EWEB) |
How Eugene compares
- Tap water in Eugene is 89 % softer than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 1342 of 1372 in the United States (1 = hardest); 2 % of these cities have softer water.
- In Oregon it is number 13 of 13 cities; the regional median is 2.1 gpg.
Ranking of the hardest and softest water in the United States →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Eugene
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 1 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Eugene water hard or soft?
It is soft: 17 mg/L as CaCO₃ (1 gpg, 1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Eugene safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
How many grains per gallon is Eugene water?
1 gpg, equal to 1 °dH, 1.7 °fH or 17 mg/L calcium carbonate.
What dishwasher salt setting should I use in Eugene?
For 17 mg/L (1 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Eugene?
No. With soft water a softener adds nothing.
Source
Source: EWEB 2025 Water Testing Results (testing summary) (2025). Method: figure published by the water supplier. EWEB 2025 Water Testing Results (testing summary) · Outdated figure? Tell us