Water Hardness and Quality in Brentwood
Supplied by Affinity Water · Pilgrims Hatch (AF071)
Brentwood has hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Brentwood
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
265mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Above Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.3pH units
UK Average: 7.43 pH unitsBelow Average
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.31mg/l
UK Average: 0.45 mg/lBelow Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
15.2mg/l
UK Average: 16.9 mg/lAverage
LowAverageHigh
Lead
UK Standard: max 10 µg/l
0.08µg/l
UK Average: 1.08 µg/lWell Below Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.277mg/l
UK Average: 0.19 mg/lWell Above Average
LowAverageHigh
Water Hardness in Brentwood
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
265mg/l CaCO₃Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Brentwood has hard water at 265 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
- Pilgrims Hatch (AF071)
- Source Type
- Groundwater
- Treatment Works
- Pilgrims Hatch Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Affinity Water
Frequently Asked Questions
Is the water hard in Brentwood?▾
Yes, Brentwood has hard water at 265 mg/l CaCO₃. This is classified as "Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Brentwood tap water safe to drink?▾
Yes, tap water in Brentwood 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 Brentwood?▾
The water hardness in Brentwood is 265 mg/l CaCO₃, which is classified as "Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Brentwood?▾
Water in Brentwood is supplied by Affinity Water, which serves the South East England region. The water comes from underground aquifers and is treated at Pilgrims Hatch Treatment Works.