Rainhill Water Hardness & Quality Report (2026)
Water Hardness
~0–99 mg/L
Softestimated · not lab-verified
Source
mixed
pH Level
7
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
5 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 Rainhill, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Rainhill | 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 Rainhill compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Rainhill, North West | ≈ 0–99 mg/L | 3.5° | 🟢 Soft | mixed |
| Whiston, North West | ≈ 200–300 mg/L | 11.6° | 🟠 Hard | mixed |
| Prescot, North West | ≈ 0–100 mg/L | 6.8° | 🟢 Soft | mixed |
| St Helens, North West | ≈ 0–100 mg/L | 12.5° | 🟢 Soft | mixed |
| Widnes, North West | ≈ 150–200 mg/L | 4° | 🟡 Moderately Hard | mixed |
National Benchmark
How Rainhill compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rainhill | ≈ 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 Rainhill's Water Unique?
Local geology and source profile
For residents of Rainhill, water originates from the expansive Llyn Vyrnwy reservoir, a primary source for United Utilities. This water travels from mid-Wales to the Prescot Water Treatment Works for processing before being distributed to homes in the south Merseyside St Helens area. The mixed water sources are carefully managed to ensure a consistent supply to the community.
Geology & Source: Vyrnwy valley; geology of the area is primarily Silurian mudstones and sandstones; soft water
Other North West Water Reports
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