Water hardness

DN37 Grimsby

Harder than the UK average. Expect visible limescale on kettles and taps.

At 238 ppm, Grimsby sits among the UK's hardest water areas — compare it against the softest areas.

Hard 238 ppm Yorkshire Yorkshire Water

Your reading

238

parts per million

Soft

Moderate

Hard

Very hard

0100200300400+

What this means for your home

Based on 238 ppm in Grimsby (hard water).

Significant limescale buildup in kettles, pipes and boilers
Soap scum on shower screens and taps
Higher energy bills from scale in heating elements
Dry skin and dull hair after washing
White residue on dishes and glassware

Heat loss

Moderate scaling

Softener salt

£14–23

per year

Worth it?

Yes

at 238 ppm

Suggested for hard water

Whole-house water softener

Best long-term protection for boilers and pipes.

From £600 installed

Shower head filter

A simple first step for limescale on tiles and glass.

From £25

Filter jug or under-sink

Improves taste and reduces kettle scale.

From £20

Softening

Should you soften the water in Grimsby?

A verdict and running-cost estimate based on DN37's 238 ppm reading, for a typical 4-person household.

Softener recommended

Hardness is moderate to hard, so a softener cuts scale and soap use and usually pays back over its lifetime.

Recommended size

24k

grain capacity, regenerates ~every 11.3 days

Salt running cost

£14–23

per year (~48 kg salt)

Limescale

est. heater efficiency loss. Moderate scaling

Soap saving

Moderate

Noticeable saving: soaps lather more easily, cutting detergent use.

Appliance impact at 238 ppm: noticeable: boiler/dishwasher life cut without descaling. Sized for a 4-person home; regenerates roughly every 11 days (estimate). Figures are conservative estimates and vary with household size and usage.

Recommended

Products for Grimsby

Popular choices for households dealing with hard water.

Splendid Twin Tank Water Softener

From ~£400

Twin-tank electric softener sized for 1 to 7 bedroom homes. Removes limescale from pipes, boilers, and appliances and delivers continuous soft water, with metered regeneration to keep salt use low.

View on Amazon

Philips Shower Filter

From ~£30

Quick win for skin and hair in hard water areas. Reduces chlorine and limescale, fits standard shower hoses in minutes, no tools needed. Cartridge lasts around 6 months.

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BRITA Marella Water Filter Jug

From ~£20

UK's best-selling filter jug. Reduces limescale, chlorine, and metals for better-tasting tap water. Quick first step alongside a softener.

View on Amazon

Water quality details

Hardness data for DN37

Sourced from Yorkshire Water's published water-quality reports and public records.

Hardness measurements

Parts per million (ppm CaCO₃)	238
Degrees Clark (°Clark)	16.7
Degrees French (°fH)	23.8
Degrees German (°dH)	13.3
Calcium (mg/L Ca²⁺)	95

Supplier and area

Water supplier Yorkshire Water

Region Yorkshire

County South Yorkshire

Hardness band Hard

UK average 207 ppm

Visit Yorkshire Water page

Official source

Yorkshire Water water-hardness report

Enter your postcode in the search tool to get the calcium and magnesium hardness level for your specific area.

Nearby

Other areas near Grimsby

FAQ

Common questions about DN37

What is the water hardness in DN37 Grimsby?

The water in DN37 Grimsby has a hardness level of 238 ppm (parts per million) calcium carbonate, classified as hard. This is 31 ppm above the UK national average of 207 ppm.

Which water company supplies DN37?

DN37 Grimsby is supplied by Yorkshire Water. Yorkshire Water serves the Yorkshire region.

Is the water in DN37 safe to drink?

Yes. Hard water at 238 ppm is safe to drink. Water hardness affects taste and can cause limescale, but it is not a health risk. In fact, hard water contains beneficial minerals like calcium and magnesium.

How can I reduce water hardness in DN37?

For hard water at 238 ppm, a whole-house water softener is the most effective solution. You can also use a jug filter for drinking water, descaling products for appliances, and a shower filter for better skin and hair.

What does 238 ppm water hardness mean?

238 ppm means there are 238 parts per million of calcium carbonate dissolved in the water. This is equivalent to 16.7 Clark degrees, 13.3 German degrees, or 23.8 French degrees. Water above 180 ppm is generally considered hard.

What size water softener do I need in DN37?

For a typical 4-person home at 238 ppm, a 24,000 grain softener is a sensible size. It would regenerate roughly every 11.3 days. Larger households or higher daily use need a bigger unit. These figures are conservative estimates.

How much does it cost to run a water softener in DN37?

At 238 ppm, expect to use about 48 kg of salt a year, costing roughly £14–£23/year. Hardness is moderate to hard, so a softener cuts scale and soap use and usually pays back over its lifetime.

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