Great Sankey Water Hardness & Quality Report (2026)
Water Hardness
8.6°Clark12.3°fH6.9°dH
Source
mixed
pH Level
7.7
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
318.5 mg/L
Est. Daily Cost
£0.28
energy & soap waste
Source: DWI Data Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Great Sankey, your appliances are currently losing 16% efficiency due to mineral buildup.
| Appliance | In Great Sankey | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.5 yrs | 8.5 yrs | -35% |
| Washing Machine | 9 yrs | 12 yrs | -25% |
| Water Heater | 10.7 yrs | 15 yrs | -29% |
Regional Water Comparison
How Great Sankey compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Great Sankey, North West | 123 mg/L | 8.6° | 🟠 Hard | mixed |
| Warrington, North West | 103.5 mg/L | 7.3° | 🟡 Moderately Hard | mixed |
| Newton-le-Willows, North West | 192 mg/L | 13.5° | 🔴 Very Hard | mixed |
| Haydock, North West | 77.5 mg/L | 5.4° | 🟡 Moderately Hard | mixed |
| Ashton in Makerfield, North West | 183.5 mg/L | 12.9° | 🔴 Very Hard | mixed |
National Benchmark
How Great Sankey compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Great Sankey | 123 mg/L | 🟠 Moderate |
| United Kingdom National Avg | 183 mg/L | 🔴 High |
| Livingston Top Rated | 8.5 mg/L | 🟢 None |
Bring Livingston-quality water to your Great Sankey home
Shop water softeners on Amazon.co.uk →
What Makes Great Sankey's Water Unique?
Local geology and source profile
Great Sankey, in the Borough of Warrington in south Lancashire/Cheshire on the south bank of the Mersey plain, is supplied by United Utilities from the Thirlmere Lake District aqueduct and the River Dee treated at Huntington Water Treatment Works near Chester. The Thirlmere aqueduct delivers very soft water from the Borrowdale Volcanic catchment of the central Lake District, and the Dee supply from its Snowdonian headwaters adds further soft water. Great Sankey's Warrington position in the lower Mersey valley means the supply network blends the soft Thirlmere/Dee input with moderate contributions from the wider Greater Manchester and Cheshire distribution grid, producing a moderately soft supply. The Mersey plain Cheshire network delivers a blend that is somewhat harder than the pure Thirlmere supply but softer than the more Triassic-influenced Cheshire plain zones.
Great Sankey's hardness of 123 mg/L (8.6°Clark) reflects the blend of soft Thirlmere and Dee supply with the moderate Cheshire/Warrington distribution network in the south Lancashire supply zone. The Drinking Water Inspectorate (DWI) classifies this supply as moderately soft.
Limescale is a moderate concern in Great Sankey. At 123 mg/L, limescale forms gradually and kettles need descaling every one to two months. Combi-boiler heat exchangers accumulate modest deposits; annual servicing is sensible. Showerheads and taps develop light deposits. Washing-up liquid lathers reasonably well. A monthly Calgon tablet in the washing machine and a regular kettle descale is adequate limescale management for most Great Sankey households.
Geology & Source: Supplied by United Utilities from Thirlmere and the River Dee at Huntington — Great Sankey's Warrington position in the Mersey plain draws on United Utilities' blended very soft Lake District and Dee supply with moderate Cheshire distribution network contributions, producing moderately soft water at 123 mg/L (8.6°Clark).