Yorkshire & The Humber water is soft to hard — varies significantly by sub-region. Supplied by Yorkshire Water. Enter your postcode for your exact zone report.
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Yorkshire & The Humber is the administrative region covering West Yorkshire, South Yorkshire, East Riding of Yorkshire, North Yorkshire, and the city of Kingston upon Hull. The entire region is served by a single water company: Yorkshire Water, which operates one of the UK's more complex supply systems given the dramatic variation in geology and source water across its service area.
The defining characteristic of water quality in this region is the extreme variation in hardness from west to east. Western Yorkshire (Sheffield, Leeds, Bradford, Huddersfield, Calderdale) receives water from Pennine moorland reservoirs — naturally very soft, with hardness typically below 100 mg/L CaCO₃. Eastern Yorkshire (Hull, Beverley, Driffield, Bridlington) receives water from the Yorkshire Wolds chalk aquifer — naturally hard, with hardness in the 200–260 mg/L range. This means residents of Sheffield and Hull, just 60 miles apart, live with water that behaves completely differently in their kettles, boilers, and on their skin.
Yorkshire Water's performance in DWI annual reports has been generally good, with consistently high compliance rates. The company has invested substantially in treatment infrastructure following regulatory pressure on THMs (trihalomethanes) — a parameter that can be elevated in moorland-sourced water due to natural organic matter from peat reacting with chlorine. Yorkshire Water also holds an active DWI PFAS improvement notice, requiring investment in advanced treatment.
The Pennine moorland that feeds Yorkshire Water's western reservoir system is characterised by peat — decomposed organic matter that gives moorland streams their characteristic tea-brown colour. When this organic-rich water is chlorinated during treatment, it forms trihalomethanes (THMs) as disinfection by-products. Yorkshire Water manages this through careful treatment, including enhanced coagulation and carbon filtration. A carbon jug filter at the tap will further reduce chlorine and THMs in drinking water.
Yes. Tap water in Yorkshire & The Humber is safe to drink. UK tap water is subject to rigorous regulation and testing. Over 99.9% of samples pass legal standards each year. Enter your postcode above for your specific zone's data.
Yorkshire & The Humber has soft to hard — varies significantly by sub-region water. Low mineral content — no limescale issues. Water is excellent for appliances.
Yorkshire & The Humber is served by: Yorkshire Water. Enter your postcode to identify your exact water company.
Yorkshire & The Humber has water companies with active DWI PFAS improvement notices. Enter your postcode to check your zone.