Scotland

Scottish Water: water quality and hardness

Scottish Water provides public drinking-water and wastewater services in Scotland. Its mains-water reports do not describe a private well, borehole or other private supply.

An independent WaterGrade guide. Local readings vary by source area and date.

Find the water serving your home

Use the supplier’s official postcode or area-report route to identify your zone, then find any verified records we hold below.

Find my official local report ↗

Automated WaterGrade postcode matching is not yet available for this supplier.

Step-by-step Scottish postcode and history guide

How Scottish Water reports on your water

Scottish Water publishes annual hardness tables separately from its zone quality reports. It calculates annual hardness from calcium and magnesium measurements. A newer quality report therefore need not contain a newer hardness figure.

Use the official postcode checker and note its “Site Name”. Search that exact name below. We keep differently named historical areas separate unless evidence establishes a connection.

Company information and source context ↗

What WaterGrade currently holds

Named areas with records: 369
Areas with measured hardness: 369
Areas with other quality data: 1
Areas with annual hardness history: 339

These count our verified records, including historical areas. They are not the company’s current total zones, population coverage or a quality score.

We hold the 2016–2024 hardness editions and Glencorse C’s full 2025 quality report. Historical names are included in the directory; this is not a count of today’s supply zones or automated Scottish postcode coverage.

Is the water hard or soft?

Check the figure for your supply zone. A company can deliver water from different sources, so a single average can give the wrong appliance setting for your home. Hardness describes dissolved minerals; it is not a safety rating.

Our local cards use mg/l as calcium carbonate (CaCO₃). Keep the original unit and reporting period when comparing results. Supplier labels can use different hardness bands.

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What do the quality results tell you?

Read each parameter with its units, sample count, range and reporting period. A mean below a reference limit does not establish that every sample complied. A “less than” result is not an exact concentration.

Company-wide performance, local zone results and water at an individual tap are different levels of information. Historical exceedances need the supplier’s investigation context; they are not automatically a current incident.

Understand the measurements in a water report

One named-area example · not a company average

Inside the Glencorse C report

30.6 mg/l as CaCO₃ · hardness period: 2024

Quality reporting period: 2025. 52 parameters in this publication. Hardness may come from a separate source and period.

This is a retained approved report. Automatic collection is currently unavailable for this source. Check the original supplier report for more recent information.

Selected source measurements for Glencorse C
Parameter	Published mean	Samples
Hydrogen ion (pH)	8.05 pH units	49
Nitrate	1.4 mgNO3/l	4
Iron	21.71 μgFe/l	49
Lead	0.76 μgPb/l	50
Residual Disinfectant - Free	0.08 mg/l	192
Fluoride	<0.12 mgF/l	4

This selected example may not serve your postcode. Open the full report for ranges, source notes, any reported contraventions and the original document.

Read the full Glencorse C report →

Find your local source-area report

Use the exact area name from the supplier’s checker. Older areas can have been renamed or replaced. Each card keeps the hardness period separate from other quality data.

Search by the exact source-area nameWith annual hardness history

369 areas match · showing 24.

Acharacle

9.53 mg/l as CaCO₃ · Soft

Hardness period: 2024

Additional quality parameters are not held here.