LocalDataPoint

Coalville Water Hardness & Quality Report (2026)

Water Hardness

155.5mg/L
Moderately Hard

10.9°Clark15.6°fH8.7°dH

Source

mixed

pH Level

7.5

neutral = 7.0

Lead

0.002 mg/L

✓ Below action level

TDS

277.6 mg/L

Est. Daily Cost

£0.35

energy & soap waste

Source: DWI Data Portal · Updated 2026

155.5mg/L as CaCO₃Moderately Hard

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 Coalville, your appliances are currently losing 21% efficiency due to mineral buildup.

ApplianceIn CoalvilleSoft Water CityEfficiency Loss
Kettle
6.7 yrs
8.5 yrs-21%
Washing Machine
9.5 yrs
12 yrs-21%
Water Heater
11.9 yrs
15 yrs-21%

Regional Water Comparison

How Coalville compares to its nearest neighbours

CityHardnessClark°RiskSource
Coalville, East Midlands155.5 mg/L10.9°🟡 Moderately Hardmixed
Shepshed, East Midlands≈ 200–300 mg/L14.2°🟠 Hardmixed
Ashby-de-la-Zouch, East Midlands244.5 mg/L17.2°🟠 Hardmixed
Earl Shilton, East Midlands≈ 200–300 mg/L9.6°🟠 Hardmixed
Loughborough, East Midlands≈ 200–300 mg/L15.8°🟠 Hardmixed

National Benchmark

How Coalville compares to the United Kingdom average

BenchmarkHardnessAppliance Risk
Coalville155.5 mg/L🟡 Moderate
United Kingdom National Avg177 mg/L🟡 Moderate
Skipton Top Rated7.1 mg/L🟢 None

Bring Skipton-quality water to your Coalville home

Shop water softeners on Amazon.co.uk

Shop Now

What Makes Coalville's Water Unique?

Local geology and source profile

Source: MixedTDS: 277.6 mg/LpH: 7.5

Severn Trent Water supplies Coalville, Leicestershire, drawing water from both surface reservoirs and groundwater sources across the East Midlands. This vast utility operates numerous treatment plants, ensuring water reaches the roughly 8 million people it serves throughout the Midlands region. The Coalville area is part of the East Midlands watershed, where a blend of surface and groundwater sources are utilized. The character of this supply is shaped by the underlying geology and the mineral content dissolved within it.

The East Midlands region is defined by Carboniferous Coal Measures formations, which are subsequently overlain by Triassic Mercia Mudstone and sandstone strata. These geological features, including limestone and sandstone aquifers, are responsible for leaching minerals such as calcium and magnesium into the water. This process results in a water supply that is typically classified as moderately hard to hard, a common characteristic for the area's water.

Homeowners in Coalville may notice limescale buildup on appliances like kettles, shower heads, and within heating systems, which can impact efficiency and lead to increased upkeep. Regular use of descaling agents can help manage these deposits. For those experiencing persistent issues with mineral buildup, installing a domestic water softener is often a practical solution to prolong the life of household appliances and reduce maintenance demands. Severn Trent Water provides detailed water quality information on its website.

Geology & Source: East Midlands; Carboniferous Coal Measures, Triassic Mercia Mudstone, limestone and sandstone aquifers contribute moderate to high hardness

Other East Midlands Water Reports

Report an Issue

Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Contact Us

Frequently Asked Questions

Is Coalville's water safe to drink?
Yes. Coalville's water meets all DWI drinking water standards. The hardness is 155.5 mg/L (Moderately Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.
Do I need a water softener in Coalville?
At 155.5 mg/L (Moderately Hard), Coalville's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 21%.
How does Coalville compare to the United Kingdom average?
The United Kingdom national average is 177 mg/L. Coalville (155.5 mg/L) is 22 mg/L below the national average. The softest major city is Skipton at just 7.1 mg/L.