Water Hardness and Quality in Colwick
Supplied by Severn Trent Water · Gedling Zone 39
Colwick has moderately hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Colwick
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
198.5mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.99pH units
UK Average: 7.43 pH unitsWell Above Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.18mg/l
UK Average: 0.45 mg/lWell Below Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
20.03mg/l
UK Average: 16.9 mg/lAbove Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.5µg/l
UK Average: 1.08 µg/lAverage
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.11mg/l
UK Average: 0.19 mg/lAverage
LowAverageHigh
Water Hardness in Colwick
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
198.5mg/l CaCO₃Moderately Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Colwick has moderately hard water. You may notice some limescale buildup in your kettle and on taps over time. A regular descaling routine should be sufficient for most households.
Water Source Information
- Water Company
- Severn Trent Water
- Supply Zone
- Gedling Zone 39
- Source Type
- Mixed
- Treatment Works
- Nottingham Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Severn Trent Water
Frequently Asked Questions
Is the water hard in Colwick?▾
Colwick has moderately hard water at 198.5 mg/l CaCO₃. Some limescale may occur but it is manageable with regular descaling.
Is Colwick tap water safe to drink?▾
Yes, tap water in Colwick 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 Colwick?▾
The water hardness in Colwick is 198.5 mg/l CaCO₃, which is classified as "Moderately Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Colwick?▾
Water in Colwick is supplied by Severn Trent Water, which serves the West Midlands region. The water comes from mixed sources and is treated at Nottingham Treatment Works.