AquaScaleEurope

Trondheim vs London

Water hardness comparison — how the two cities differ and what it means for your home.

Trondheim

norway

47mg/L

Soft Water

3.29°e
Soft
Base Unit (CaCO3): 47 mg/LLocal Unit
Full Trondheim data →
Harder

London

united kingdom

277mg/L

Very Hard Water

19.39°e
Very Hard
Base Unit (CaCO3): 277 mg/LLocal Unit
Full London data →

Side-by-Side Impact

Impact AreaTrondheimLondon
Limescale buildupMinimalRapid — visible within weeks
Boiler/heating riskLow riskAnnual descaling required
Dishwasher salt settingLow setting (1–2)Max salt setting (5–7)
Skin & hair impactLow riskHigh eczema/dry skin risk
Detergent usageStandard dose+30–40% more detergent

Key Findings

Hardness Difference: 230 mg/L

London is significantly harder than Trondheim — a difference that has major household implications. Appliances, boiler warranties, and detergent costs will differ substantially.

Moving from Trondheim to London?

If you're relocating from Trondheim to London, expect visible limescale on taps and shower heads within weeks. You'll need to recalibrate your dishwasher's salt setting, increase kettle descaling frequency, and check your boiler warranty requirements. A shower filter and under-sink scale inhibitor are worth considering immediately.

Compare With Other Cities