Water Hardness and Quality in Nottingham
Supplied by Severn Trent Water · Nottingham Zone 12
Nottingham has hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Nottingham
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
225.6mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.38pH units
UK Average: 7.43 pH unitsAverage
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.15mg/l
UK Average: 0.45 mg/lWell Below Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
21.32mg/l
UK Average: 16.9 mg/lAbove Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.22µg/l
UK Average: 1.08 µg/lWell Below Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.21mg/l
UK Average: 0.19 mg/lWell Above Average
LowAverageHigh
Water Hardness in Nottingham
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
225.6mg/l CaCO₃Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Nottingham has hard water at 225.6 mg/l. You will likely experience significant limescale buildup in kettles, boilers, and on bathroom surfaces. Many residents in your area use water softeners or anti-limescale products.
Water Source Information
- Water Company
- Severn Trent Water
- Supply Zone
- Nottingham Zone 12
- Source Type
- Groundwater
- Treatment Works
- Nottingham Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Severn Trent Water
Frequently Asked Questions
Is the water hard in Nottingham?▾
Yes, Nottingham has hard water at 225.6 mg/l CaCO₃. This is classified as "Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Nottingham tap water safe to drink?▾
Yes, tap water in Nottingham is safe to drink. It is treated and tested by Severn Trent Water and meets all UK Drinking Water Inspectorate standards. All tested parameters are within regulatory limits.
What is the water hardness in Nottingham?▾
The water hardness in Nottingham is 225.6 mg/l CaCO₃, which is classified as "Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Nottingham?▾
Water in Nottingham is supplied by Severn Trent Water, which serves the West Midlands region. The water comes from underground aquifers and is treated at Nottingham Treatment Works.