102 postcode districts testedWater quality in Yorkshire and the Humber
According to TapWater.uk's analysis, Yorkshire and the Humber scores 9.3/10 for drinking water quality in 2026, based on data from 102 postcode districts. Water quality across Leeds, Sheffield, Bradford, York and Hull. Supplied by Yorkshire Water.
9.3 / 10
102 areas tested · 1 supplier
Tap water in Yorkshire and the Humber has an average safety score of 9.3 out of 10 based on testing across 102 postcode districts. Water is supplied by Yorkshire Water. The overall water quality is good. Data is sourced from the Environment Agency and water company testing via the Stream Water Data Portal.
Cities in Yorkshire and the Humber
Average water quality score by city.
163mg of limescale minerals in every litre, on average across Yorkshire and the Humber
Yorkshire and the Humber water is moderately hard
Hard starts at 180 mg/L, very hard at 250. Hardness varies by area; check your own postcode for the reading where you live.
River health around Yorkshire and the Humber
2 of the 51 rivers and waters that Yorkshire and the Humber drains into are rated good or high by the Environment Agency. All of them fail the chemical test, as every river in England does, because of long-lasting pollutants such as mercury and PFOS. This describes the rivers, not your tap water.
| River or water | Ecological health | Postcode districts |
|---|---|---|
| Cock Beck Catchment (trib of Wharfe) | Bad | LS14 |
| Gypsey Race from Source to North Sea | Bad | YO16 |
| Sheaf from Source to River Don | Poor | S1, S2, S7, S8, S14, S17 |
| Don from River Loxley confl to River Don Works | Poor | S3, S4 |
| Blackfoss Bk lower Catch (trib of Pocklington Bk) | Poor | YO41 |
| Foss Dike | Poor | YO26 |
| Foulness from Black Beck to Market Weighton Canal | Poor | YO43 |
| Mill Dike from Source to Bishop Dike | Poor | LS25 |
| Aire from Gill Beck (Baildon) to Wyke Beck | Moderate | BD10, LS1, LS2, LS3, LS4, LS5, LS6, LS10 and 5 more |
| Bradford Beck (Clayton Bk to R Aire) | Moderate | BD1, BD2, BD3, BD5, BD7, BD8, BD9, BD18 |
| Beverley and Barmston Drain | Moderate | HU2, HU3, HU5, HU6, HU16, HU17, HU20 |
| Fleet Drain | Moderate | HU4, HU10, HU13, HU14 |
Showing the 12 lowest rated of 51. Environment Agency classification, 2025. River health across England
Areas to watch
Water suppliers
- Yorkshire Water102 areas
All postcode areas in Yorkshire and the Humber
Every postcode district we monitor in this region.
BD1BD10BD11BD12BD13BD14BD15BD16BD17BD18BD2BD20BD21BD22BD3BD4BD5BD6BD7BD8BD9DN14HU1HU10HU11HU12HU13HU14HU15HU16HU17HU18HU19HU2HU20HU3HU4HU5HU6HU7HU8HU9LS1LS10LS11LS12LS13LS14LS15LS16LS17LS18LS19LS2LS20LS21LS22LS23LS25LS26LS27LS28LS29LS3LS4LS5LS6LS7LS8LS9S1S10S11S12S13S14S17S2S20S3S35S4S5S6S7S8S9YO1YO10YO15YO16YO19YO23YO24YO25YO26YO30YO31YO32YO41YO42YO43
Questions about Yorkshire and the Humber water
Is tap water safe in Yorkshire and the Humber?
Based on our analysis of 102 postcode districts in Yorkshire and the Humber, the average water quality score is 9.3/10, which is safe. Water is supplied by Yorkshire Water.
Which area has the best water in Yorkshire and the Humber?
S20 (Sheffield) has the highest water quality score in Yorkshire and the Humber at 10.0/10.
Which area has the worst water in Yorkshire and the Humber?
HU3 (Kingston upon Hull, City of) has the lowest water quality score in Yorkshire and the Humber at 8.5/10. Check the postcode page for details on specific contaminants.
Is Yorkshire and the Humber water hard or soft?
Water in Yorkshire and the Humber has an average hardness of 163 mg/L CaCO₃, which is classified as moderately hard. Hardness varies by area — check your postcode for exact levels.
Who supplies water in Yorkshire and the Humber?
Water in Yorkshire and the Humber is supplied by Yorkshire Water.
Data sourced from the Environment Agency Water Quality Archive and water company testing via the Stream Water Data Portal. See our methodology for how scores are calculated. Reviewed by the TapWater.uk research team.