What is the water hardness in Watford?

Between 235 and 313 mg/L depending on the district, with a median of 289. The hardest measured district is WD7 at 313 mg/L and the softest is WD5 at 235. Figures come from water company drinking-water tests.

Do I need a water softener in Watford?

In most WD homes a softener pays for itself: at 289 mg/L kettles, boilers and showers scale up quickly. Check your own district first, because hardness varies from 235 to 313 within the area.

Is Watford a hard water area?

Yes. Tap water across the WD postcode area is very hard, the top band on the scale water companies use, with a median of 289 mg/L calcium carbonate. It ranges from 235 mg/L in WD5 to 313 mg/L in WD7, from 11 districts with their own water company reading.

Soft
Moderately soft
Slightly hard
Hard
Very hard

Hardness in mg/L as calcium carbonate, the scale UK water companies report in.

Hardness by WD district

Hardest first. Hard starts at 180 mg/L, very hard at 250.

District	Area	mg/L	Hardness
WD7	Hertsmere	313	very hard
WD19	Three Rivers	300	very hard
WD4	Dacorum	295	very hard
WD23	Hertsmere	295	very hard
WD18	Watford	289	very hard
WD3	Three Rivers	289	very hard
WD17	Watford	289	very hard
WD6	Hertsmere	288	very hard
WD25	Watford	272	very hard
WD24	Watford	269	very hard
WD5	Three Rivers	235	hard

Softener quotes for Watford

At 289 mg/L most WD homes get their money back on a softener within a few years. Free quotes from installers covering your postcode, no obligation.

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Check your exact postcode

The area figure is a median. Your district can sit anywhere between 235 and 313 mg/L.

Nearby areas

Is Watford a hard water area?: Yes. The median hardness across WD postcode districts is 289 mg/L calcium carbonate, which is very hard. 100% of the 11 districts we hold readings for are hard or very hard (180 mg/L and above).
What is the water hardness in Watford?: Between 235 and 313 mg/L depending on the district, with a median of 289. The hardest measured district is WD7 at 313 mg/L and the softest is WD5 at 235. Figures come from water company drinking-water tests.
Do I need a water softener in Watford?: In most WD homes a softener pays for itself: at 289 mg/L kettles, boilers and showers scale up quickly. Check your own district first, because hardness varies from 235 to 313 within the area.

Hardness as mg/L calcium carbonate from water company drinking-water tests and postcode checkers. See the UK hardness map for every area.