Water hardness in Caboolture
57 mg/L soft
Tap water in Caboolture is soft: 57 mg/L (3.3 gpg · 3.2 °dH · 5.7 °fH).
Source: Seqwater, Water quality report – Moreton (12 months to 2026-09) (2026-09) · data checked 2026-10-20
Range across supply zones: 37–100 mg/L.
This area is supplied through Seqwater's South East Queensland water grid, which links dams, treatment plants and a desalination plant. The reported hardness is 57.3 mg/L CaCO₃, with measurements from 37.0 to 100.0 mg/L. Scale builds up slowly, so a softener is rarely needed.
Australian Drinking Water Guidelines: aesthetic target ≤ 200 mg/L CaCO₃.
Water data
| Total hardness | 57 mg/L |
|---|---|
| Utility | Seqwater (bulk supply) |
How Caboolture compares
- Tap water in Caboolture is 33 % softer than the median of the 307 cities we track in Australia (85 mg/L).
- By hardness it ranks 204 of 307 in Australia (1 = hardest); 33 % of these cities have softer water.
- In Queensland it is number 23 of 29 cities; the regional median is 68 mg/L.
- Nearest city with clearly softer water: Gold Coast, 112 km away (38 mg/L).
- Nearest city with clearly harder water: Brisbane, 43 km away (117 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 Caboolture
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 3 °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 Caboolture water hard or soft?
It is soft: 57 mg/L as CaCO₃ (3.3 gpg, 3.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Caboolture 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 Caboolture water?
3.3 gpg, equal to 3.2 °dH, 5.7 °fH or 57 mg/L calcium carbonate.
What dishwasher salt setting should I use in Caboolture?
For 57 mg/L (3.2 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Caboolture?
No. With soft water a softener adds nothing.
Source
Source: Seqwater, Water quality report – Moreton (12 months to 2026-09) (2026-09). Method: figure published by the water supplier. Seqwater, Water quality report – Moreton (12 months to 2026-09) · Outdated figure? Tell us