Water hardness in Portland
16 mg/L soft
Tap water in Portland is soft: 16 mg/L (0.9 gpg · 0.9 °dH · 1.6 °fH).
Source: Wannon Water, Drinking Water Quality Annual Report 2025/26, Table 6-20 Total hardness as CaCO3 by sampling area (2026-09) · data checked 2026-11-12
Australian Drinking Water Guidelines: aesthetic target ≤ 200 mg/L CaCO₃.
Water data
| Total hardness | 16 mg/L |
|---|---|
| Utility | Wannon Water |
How Portland compares
- Tap water in Portland is 81 % softer than the median of the 307 cities we track in Australia (85 mg/L).
- By hardness it ranks 302 of 307 in Australia (1 = hardest); 1 % of these cities have softer water.
- In Victoria it is number 45 of 46 cities; the regional median is 66 mg/L.
- Nearest city with clearly harder water: Warrnambool, 77 km away (64 mg/L).
Ranking of the hardest and softest water in Australia →
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 Portland
| 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 Portland water hard or soft?
It is soft: 16 mg/L as CaCO₃ (0.9 gpg, 0.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Portland safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Australian Drinking Water Guidelines: aesthetic target ≤ 200 mg/L CaCO₃.
How many grains per gallon is Portland water?
0.9 gpg, equal to 0.9 °dH, 1.6 °fH or 16 mg/L calcium carbonate.
What dishwasher salt setting should I use in Portland?
For 16 mg/L (0.9 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Portland?
No. With soft water a softener adds nothing.
Source
Source: Wannon Water, Drinking Water Quality Annual Report 2025/26, Table 6-20 Total hardness as CaCO3 by sampling area (2026-09). Method: figure published by the water supplier. Wannon Water, Drinking Water Quality Annual Report 2025/26, Table 6-20 Total hardness as CaCO3 by sampling area · Outdated figure? Tell us