Stroud Green Water Hardness & Quality Report (2026)
Water Hardness
301+ mg/L
Very Hardestimated · not lab-verified
Source
mixed
pH Level
8.6
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
835.1 mg/L
Est. Daily Cost
£0.85
energy & soap waste
Source: DWI Data Portal · Updated 2026
0–99
mg/L
Soft
100–149
mg/L
Slightly Hard
150–199
mg/L
Moderately Hard
200–300
mg/L
Hard
300+
mg/L
Very Hard
Appliance Damage Report
In Stroud Green, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Stroud Green | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 6.6 yrs | 12 yrs | -45% |
| Water Heater | 8.3 yrs | 15 yrs | -45% |
Regional Water Comparison
How Stroud Green compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Stroud Green, Greater London | ≈ 301+ mg/L | 28.1° | 🔴 Very Hard | mixed |
| Harringay, Greater London | ≈ 300+ mg/L | 13.6° | 🔴 Very Hard | mixed |
| Crouch End, Greater London | ≈ 200–300 mg/L | 14.8° | 🟠 Hard | mixed |
| Hornsey, Greater London | ≈ 200–300 mg/L | 22.2° | 🟠 Hard | mixed |
| St. Ann's, Greater London | ≈ 200–300 mg/L | 19.4° | 🟠 Hard | mixed |
National Benchmark
How Stroud Green compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Stroud Green | ≈ 301+ mg/L | 🔴 Very High |
| United Kingdom National Avg | 177 mg/L | 🟡 Moderate |
| Skipton Top Rated | 7.1 mg/L | 🟢 None |
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What Makes Stroud Green's Water Unique?
Local geology and source profile
Thames Water serves Stroud Green, a part of Haringey, Greater London. The utility draws water from a mix of sources, including the River Thames and the River Lee. These waters are treated at facilities serving the wider London area before reaching residents. Thames Water is the main provider for water and wastewater services throughout this region.
Stroud Green sits within the London Basin watershed. Its underlying geology consists of Cretaceous Chalk formations and Tertiary London Clay deposits. The Chalk aquifer, the main source here, is highly permeable. As water moves through this rock, it picks up substantial amounts of calcium and magnesium minerals, a common characteristic of South East England's natural geology that results in a very hard water supply.
Homeowners in Stroud Green will likely notice considerable limescale buildup in appliances like kettles, washing machines, and dishwashers, as well as in pipes and on shower heads. This scale can decrease appliance efficiency and shorten their lifespan. Installing a water softener is a good idea for those looking to protect their household fixtures and reduce mineral deposit damage. While the water is very hard, it's not a health risk; minerals like calcium and magnesium are actually beneficial. Thames Water ensures its water meets all regulatory standards and quality standards.
Geology & Source: Cretaceous Chalk and Tertiary London Clay; Chalk aquifer rich in calcium and magnesium carbonates creates very hard water
Other Greater London Water Reports
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