24 postcode districts testedWater quality in East Midlands
According to TapWater.uk's analysis, East Midlands scores 9.1/10 for drinking water quality in 2026, based on data from 24 postcode districts. Water quality across Nottingham, Leicester, Derby and surrounding areas. Supplied by Severn Trent.
9.1 / 10
24 areas tested · 1 supplier
Tap water in East Midlands has an average safety score of 9.1 out of 10 based on testing across 24 postcode districts. Water is supplied by Severn Trent. 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 East Midlands
Average water quality score by city.
341mg of limescale minerals in every litre, on average across East Midlands
East Midlands water is very 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.
Softener quotes in East Midlands
At 341 mg/L a softener protects the boiler, kettle and taps. Tell us your postcode and we will pass your request to installers who cover it. Free, no obligation.
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River health around East Midlands
1 of the 18 rivers and waters that East Midlands drains into is 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 |
|---|---|---|
| Soar from Sence to Rothley Brook | Poor | LE1, LE3, LE21 |
| Bailey Brook Catchment (trib of Erewash) | Poor | DE75 |
| Nethergreen Brook Catchment (trib of Erewash) | Poor | NG16 |
| Trent from Soar to The Beck | Moderate | NG1, NG3, NG9 |
| Leen from Day Brook to Trent | Moderate | NG7, NG8 |
| Markeaton Brook from Mackworth Brook to Derwent | Moderate | DE1, DE22 |
| Alfreton Brook from Westwood Brook to Amber | Moderate | DE55 |
| Bottle Brook Catchment (trib of Derwent) | Moderate | DE5 |
| Chaddesden Brook Catchment (trib of Derwent) | Moderate | DE21 |
| Cuttle Brook Catchment (trib of Trent) | Moderate | DE23 |
| Day Brook Catchment (trib of Leen) | Moderate | NG5 |
| Derwent from Amber to Bottle Brook | Moderate | DE56 |
Showing the 12 lowest rated of 18. Environment Agency classification, 2025. River health across England
Questions about East Midlands water
Is tap water safe in East Midlands?
Based on our analysis of 24 postcode districts in East Midlands, the average water quality score is 9.1/10, which is safe. Water is supplied by Severn Trent.
Which area has the best water in East Midlands?
DE22 (Derby) has the highest water quality score in East Midlands at 9.3/10.
Which area has the worst water in East Midlands?
NG11 (Nottingham) has the lowest water quality score in East Midlands at 8.5/10. Check the postcode page for details on specific contaminants.
Is East Midlands water hard or soft?
Water in East Midlands has an average hardness of 341 mg/L CaCO₃, which is classified as very hard. Hardness varies by area — check your postcode for exact levels.
Who supplies water in East Midlands?
Water in East Midlands is supplied by Severn Trent.
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.