The PO3 area (Portsmouth Hilsea) is served by Portsmouth Water. Water here is typically moderately hard (195 mg/L CaCO₃). Enter any PO3 postcode for your exact zone report.
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Check the tap water quality for any postcode in the PO3 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.
PO3 (Portsmouth Hilsea) is served by Portsmouth Water. Moderately Hard water (195 mg/L CaCO₃). Some limescale build-up expected. A jug filter will improve taste.
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. PO3 1AA) gives you data for your specific supply zone rather than a district average.
Some limescale build-up expected. A jug filter will improve taste. 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 PO3 water →Yes. PO3 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.
PO3 is primarily supplied by Portsmouth Water. Enter your full postcode to confirm your exact supplier.
PO3 has moderately hard water, typically around 195 mg/L CaCO₃. Some limescale build-up expected. A jug filter will improve taste.
PFAS (per- and polyfluoroalkyl substances) are detected at low levels in many UK water supplies. The best way to check current PFAS status for PO3 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.