Water Hardness and Quality in Lemsford
Supplied by Affinity Water · Welwyn Garden City (AF020)
Lemsford has very hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Lemsford
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
320mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Well Above Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.1pH units
UK Average: 7.43 pH unitsWell Below Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.41mg/l
UK Average: 0.45 mg/lAverage
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
29mg/l
UK Average: 16.9 mg/lWell Above Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.67µg/l
UK Average: 1.08 µg/lAverage
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.149mg/l
UK Average: 0.19 mg/lAbove Average
LowAverageHigh
Water Hardness in Lemsford
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
320mg/l CaCO₃Very Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Lemsford has hard water at 320 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
- Affinity Water
- Supply Zone
- Welwyn Garden City (AF020)
- Source Type
- Groundwater
- Treatment Works
- Welwyn Garden City Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Affinity Water
Frequently Asked Questions
Is the water hard in Lemsford?▾
Yes, Lemsford has hard water at 320 mg/l CaCO₃. This is classified as "Very Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Lemsford tap water safe to drink?▾
Yes, tap water in Lemsford is safe to drink. It is treated and tested by Affinity Water and meets all UK Drinking Water Inspectorate standards. All tested parameters are within regulatory limits.
What is the water hardness in Lemsford?▾
The water hardness in Lemsford is 320 mg/l CaCO₃, which is classified as "Very Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Lemsford?▾
Water in Lemsford is supplied by Affinity Water, which serves the South East England region. The water comes from underground aquifers and is treated at Welwyn Garden City Treatment Works.