Coalville Water Hardness & Quality Report (2026)
Water Hardness
10.9°Clark15.6°fH8.7°dH
Source
mixed
pH Level
7.7
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
379.1 mg/L
Est. Daily Cost
£0.35
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 Coalville, your appliances are currently losing 21% efficiency due to mineral buildup.
| Appliance | In Coalville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.5 yrs | 8.5 yrs | -47% |
| Washing Machine | 7.8 yrs | 12 yrs | -35% |
| Water Heater | 9.4 yrs | 15 yrs | -37% |
Regional Water Comparison
How Coalville compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Coalville, East Midlands | 155.5 mg/L | 10.9° | 🟠 Hard | mixed |
| Shepshed, East Midlands | 202 mg/L | 14.2° | 🔴 Very Hard | mixed |
| Ashby-de-la-Zouch, East Midlands | 244.5 mg/L | 17.2° | 🔴 Very Hard | mixed |
| Earl Shilton, East Midlands | 137.5 mg/L | 9.6° | 🟠 Hard | mixed |
| Loughborough, East Midlands | 225 mg/L | 15.8° | 🔴 Very Hard | mixed |
National Benchmark
How Coalville compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Coalville | 155.5 mg/L | 🟠 Moderate |
| United Kingdom National Avg | 183 mg/L | 🔴 High |
| Livingston Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Coalville's Water Unique?
Local geology and source profile
Coalville, the north-west Leicestershire market town on the Charnwood Forest fringe, is supplied by Severn Trent Water from the River Soar catchment and the Triassic Sherwood Sandstone aquifer of the east Midlands. The River Soar flows south through the Leicestershire coalfield country, draining the Charnwood Forest — an upland massif of ancient Pre-Cambrian volcanic and metamorphic rocks of very low calcium content — and the surrounding Triassic plains. Severn Trent draws from the Soar at Mountsorrel and from Triassic sandstone boreholes in the Leicestershire supply zone, blending the soft Charnwood catchment runoff with moderately hard Triassic sandstone groundwater. The resulting supply is moderately hard, reflecting the blend of insoluble Pre-Cambrian Charnwood catchment and more mineralised Triassic sandstone sources.
Coalville's hardness of 155.5 mg/L (10.9°Clark) reflects the blend of soft Charnwood Forest Pre-Cambrian upland catchment and moderate Triassic Sherwood Sandstone groundwater in the Severn Trent north-west Leicestershire supply zone. The Drinking Water Inspectorate (DWI) classifies this supply as moderately hard.
Limescale is a regular household concern in Coalville. At 155.5 mg/L, limescale forms gradually in kettles and descaling every one to two months is advisable. 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 Coalville households.
Geology & Source: Supplied by Severn Trent Water from the River Soar and Triassic Sherwood Sandstone aquifer of north-west Leicestershire — Coalville's north-west Leicestershire position on the Charnwood Forest fringe draws on Severn Trent's blended Soar valley and Triassic sandstone supply, producing moderately hard water at 155.5 mg/L (10.9°Clark).