How Bognor Regis compares
At 302 mg/L (21.2 °Clark), Bognor Regis is 24% above the median of the 411 English towns on this map (243 mg/L). It ranks 68 of 411 for hardness (1 is the hardest).
Water hardness in Bognor Regis
Bognor Regis has very hard water: limescale builds up quickly, so descale often and protect your boiler.
Data
| Value | 302 mg/L calcium carbonate 21.2 °Clark, 16.9 °dH |
|---|---|
| Band | very hard |
| Area | West Sussex |
| Population | 63,885 |
| Water company | Portsmouth Water |
| Postcode checked | PO21 1XF (Littleheath Supply Zone) |
| Checked | 21 Oct 2026 |
| From the source | “"NAME":"Littleheath Supply Zone","HARDNESS":"Very Hard","CaCO3":302" (mg/l CaCO3),"ENGLISHDEG":21” |
What it means for your home
Hard water drops a lot of scale when it is heated: in the kettle, the shower head and the element of an immersion heater or washing machine. Chalky rings on taps and spotty glasses are normal.
Set the dishwasher for hard water, dose detergent for your band and descale regularly. If you have a combi boiler, ask about a scale reducer at its next service. Hard water is safe to drink.
How often to descale
As a rule of thumb for very hard water, kettles and shower heads need descaling every three or four 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 Bognor Regis?
The water company's figure for Bognor Regis is 302 mg/L (21.2 °Clark), which is very 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
Chichester 9 km Littlehampton 10 km Worthing 22 km Havant 23 km Waterlooville 27 km Portsmouth 29 km Gosport 32 km Portslade 33 km