How Exmouth compares
At 185 mg/L (13.0 °Clark), Exmouth is 24% below the median of the 411 English towns on this map (243 mg/L). It ranks 271 of 411 for hardness (1 is the hardest).
Water hardness in Exmouth
Exmouth has moderately hard water: some limescale, but easy to keep on top of.
Data
| Value | 185 mg/L calcium carbonate 13.0 °Clark, 10.4 °dH |
|---|---|
| Band | moderately hard |
| Area | Devon |
| Population | 36,204 |
| Water company | South West Water |
| Postcode checked | EX8 2DZ (Dotton (new) supply zone) |
| Checked | 21 Oct 2026 |
| From the source | “"classification":"Moderately Hard","partsPerMillion":188,"clarkeDegrees":13,"frenchDegrees":19,"germanDegrees":11” |
What it means for your home
Moderately hard water leaves some scale, but slowly. The kettle and shower head need descaling now and then, and that is usually all.
The right detergent dose and a correctly set dishwasher are enough for most homes. A softener is rarely needed.
How often to descale
As a rule of thumb for moderately hard water, kettles and shower heads need descaling every six to eight weeks. Descale whenever you see scale building up.
Common questions
Is hard water bad for you?
No. Hard water carries calcium and magnesium, minerals the body uses. Whether tap water is safe depends on germs and pollutants, which water companies test for, not on hardness.
Do I need a water softener in Exmouth?
The water company's figure for Exmouth is 185 mg/L (13.0 °Clark), which is moderately hard water. Usually not straight away. Set the dishwasher, dose detergent for your band and descale regularly. Get quotes for a softener only if scale is clearly damaging your boiler or appliances.
How do I find the value for my address?
Use your water company's postcode checker. Hardness can differ between districts, so check your own postcode, or test with strips or a drop test.
Nearby towns
Exeter 15 km Newton Abbot 18 km Torquay 19 km Paignton 23 km Taunton 49 km Plymstock 56 km Plymouth 59 km Bridgwater 63 km