The RG4 area (Caversham) is served by Thames Water. Water here is typically hard (258 mg/L CaCO₃). Enter any RG4 postcode for your exact zone report.
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Check the tap water quality for any postcode in the RG4 area. Data sourced from official annual compliance reports submitted to the Drinking Water Inspectorate (DWI). Results include water hardness, nitrate levels, lead, trihalomethanes (THMs), fluoride and PFAS enforcement status.
RG4 (Caversham) is served by Thames Water. Hard water (258 mg/L CaCO₃). Noticeable limescale build-up on appliances. A water softener or jug filter will help.
Yes — UK tap water is subject to rigorous testing and regulation, with over 99.9% of samples passing all legal standards each year. However, water quality can vary between individual supply zones even within the same postcode district. Entering your full postcode (e.g. RG4 1AA) gives you data for your specific supply zone rather than a district average.
Noticeable limescale build-up on appliances. A water softener or jug filter will help. Hard water is not a health risk, but it does affect appliances. Limescale on kettle elements increases electricity consumption. In very hard water areas, a water softener can extend the life of boilers, washing machines, and dishwashers significantly.
Enter your full postcode above to check your exact supply zone — hardness, nitrates, lead, PFAS status and more.
Check RG4 water →Yes. RG4 tap water is safe to drink under current UK guidelines. Over 99.9% of tap water tests in the UK pass legal standards each year. Enter your full postcode for a detailed report on your specific supply zone.
RG4 is primarily supplied by Thames Water. Thames Water, Anglian Water, United Utilities, Yorkshire Water, Southern Water, Severn Trent and several other companies hold active DWI PFAS improvement notices. Enter your full postcode to confirm your exact supplier.
RG4 has hard water, typically around 258 mg/L CaCO₃. Noticeable limescale build-up on appliances. A water softener or jug filter will help.
PFAS (per- and polyfluoroalkyl substances) are detected at low levels in many UK water supplies. The best way to check current PFAS status for RG4 is to enter your exact postcode above and check your zone's report, or visit the Drinking Water Inspectorate (DWI) website for the latest enforcement register.