Kilburn 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
576.9 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 Kilburn, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Kilburn | 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 Kilburn compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Kilburn, Greater London | ≈ 301+ mg/L | 28.1° | 🔴 Very Hard | mixed |
| Belsize Park, Greater London | ≈ 300+ mg/L | 14.9° | 🔴 Very Hard | mixed |
| Abbey Road, Greater London | ≈ 200–300 mg/L | 19.3° | 🟠 Hard | mixed |
| Cricklewood, Greater London | ≈ 300+ mg/L | 13.1° | 🔴 Very Hard | mixed |
| Golders Green, Greater London | ≈ 300+ mg/L | 19.3° | 🔴 Very Hard | mixed |
National Benchmark
How Kilburn compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Kilburn | ≈ 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 Kilburn's Water Unique?
Local geology and source profile
Thames Water provides Kilburn's water supply, drawing from both the Chalk aquifer via boreholes and the Thames and Lea rivers. This mixed source is then processed at treatment facilities, including the Coppermills and Waltham works, which together serve the residents of northwest London.
The London Basin watershed is characterized by Cretaceous Chalk formations, which are in turn covered by Eocene clays. The Chalk aquifer's high solubility is the primary factor contributing to the mineral-rich, hard water supply delivered to the area.
Homeowners in Kilburn will likely notice significant limescale buildup in appliances like kettles, boilers, and showers, as well as within pipes, which can decrease their efficiency. To combat this, regular descaling is advised, as are lowering hot water temperatures and installing a water softener. Thames Water maintains a pH between 7 and 8.5 and adheres to regulations for lead and copper, with no recent exceedances of PFAS reported by the DWI.
Geology & Source: Cretaceous Chalk aquifer; soluble calcite and dolomite impart hardness
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