Knotty Ash Water Hardness & Quality Report (2026)
Water Hardness
~0–99 mg/L
Softestimated · not lab-verified
Source
mixed
pH Level
7.3
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
125.9 mg/L
Est. Daily Cost
£0.11
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 Knotty Ash, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Knotty Ash | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.9 yrs | 8.5 yrs | -7% |
| Washing Machine | 11.2 yrs | 12 yrs | -7% |
| Water Heater | 14 yrs | 15 yrs | -7% |
Regional Water Comparison
How Knotty Ash compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Knotty Ash, North West | ≈ 0–99 mg/L | 3.5° | 🟢 Soft | mixed |
| Old Swan, North West | ≈ 0–100 mg/L | 6.1° | 🟢 Soft | mixed |
| Childwall, North West | ≈ 200–300 mg/L | 8° | 🟠 Hard | mixed |
| West Derby, North West | ≈ 0–100 mg/L | 5.4° | 🟢 Soft | mixed |
| Wavertree, North West | ≈ 0–100 mg/L | 6.2° | 🟢 Soft | mixed |
National Benchmark
How Knotty Ash compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Knotty Ash | ≈ 0–99 mg/L | 🟢 None |
| United Kingdom National Avg | 177 mg/L | 🟡 Moderate |
| Skipton Top Rated | 7.1 mg/L | 🟢 None |
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What Makes Knotty Ash's Water Unique?
Local geology and source profile
Residents of Knotty Ash receive their water from United Utilities, which sources the supply from the Thirlmere and Haweswater reservoirs. These stunning bodies of water are part of the Lake District aqueduct system, a vital artery for the region's water. The water is then meticulously treated at the Prescot Water Treatment Works before being distributed to homes and businesses.
The water's journey begins in the Lake District, a region known for its ancient geological formations. The bedrock here is primarily composed of igneous and metamorphic rocks, which are relatively low in dissolved minerals. This geological makeup is the key reason why the water supplied to Knotty Ash is naturally soft, registering a low 6.1 degrees Clark.
Because the water is soft, you'll notice that it doesn't leave behind much scale on your taps, showerheads, or inside your kettle. Soap and detergents lather up easily, meaning you might use less product than you're used to. While hard water can sometimes affect the lifespan of appliances like water heaters and dishwashers due to mineral buildup, the soft water in Knotty Ash is generally gentler on these systems. There are no specific taste concerns associated with this water quality, and it meets all safety standards for consumption.
Geology & Source: Lake District igneous and metamorphic bedrock; soft water due to low mineral content
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