Notting Hill Water Hardness & Quality Report (2026)
Water Hardness
301+ mg/L
Very Hardestimated · not lab-verified
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
499.5 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 Notting Hill, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Notting Hill | 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 Notting Hill compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Notting Hill, Greater London | ≈ 301+ mg/L | 28.1° | 🔴 Very Hard | mixed |
| Westbourne, Greater London | ≈ 300+ mg/L | 19.3° | 🔴 Very Hard | mixed |
| Harrow Road, Greater London | ≈ 200–300 mg/L | 19.3° | 🟠 Hard | mixed |
| Shepherds Bush, Greater London | ≈ 300+ mg/L | 19.1° | 🔴 Very Hard | mixed |
| Queen's Park, Greater London | ≈ 100–150 mg/L | 19.3° | 🟡 Slightly Hard | mixed |
National Benchmark
How Notting Hill compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Notting Hill | ≈ 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 Notting Hill's Water Unique?
Local geology and source profile
Notting Hill receives its water from Thames Water Utilities Ltd, a major provider serving millions across London and the South East. The supply originates from a combination of sources, primarily the River Thames and River Lea, supplemented by water drawn from the Chalk aquifer. Thames Water operates numerous treatment facilities and reservoirs, ensuring a consistent supply drawn from areas like the Thames Valley and various groundwater reserves.
The geology beneath Notting Hill plays a significant role in the water's character. The underlying Chalk aquifer, a limestone formation dating back to the Cretaceous period, is known for its high solubility. As water filters through this porous rock, it picks up substantial amounts of calcium and magnesium carbonate minerals. This natural geological process is responsible for the very hard water characteristic of this region of Greater London and the South East.
This very hard water can lead to visible scale buildup inside appliances like kettles and boilers, and it affects heating systems. You might find that washing machines and dishwashers need a bit more detergent to get clothes and dishes truly clean. Over time, limescale deposits can accumulate in hot water pipes and immersion heaters, potentially reducing their efficiency. Many homeowners find that installing a water softener is a worthwhile investment to protect their appliances, especially those with heating elements, and to cut down on maintenance and cleaning chores.
Geology & Source: Chalk formation; soluble limestone dissolves calcium and magnesium carbonates, producing very hard water
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