Tap water in YO15, East Riding of YorkshireSafe to drink.Very hard.
Supplied by Yorkshire Water. 952 samples, 25 substances, latest on 28 September 2026. Everything is inside the legal limit. One result, nitrate, sits close to the line.
9.0 / 10
The tank is as full as the score. The specks are the minerals that make water hard.
What to do about it
Hard water: compare softener quotes
At 297 mg/L a softener is the only thing that stops limescale. Filters do not soften water.
It pays for itself in most homes at this hardness, through a boiler that stays efficient and appliances that last.
Waterdrop G3P600 Reverse Osmosis
£550typical price
Removes nitrate, the result that stood out in YO15.
Osmio PRO-III Ultimate Whole House
£499typical price
Removes nitrate, the result that stood out in YO15.
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What's in a glass of YO15 water
Every bubble is a substance the lab measured. The higher it floats, the closer it came to its legal limit, the dashed line at the top.
Nitrate came closest to a limit, at 91% of it. 19 of 20 substances used under a quarter of theirs.
- Nitrate91%
- Colour15%
- Nickel10%
- Copper9%
- Fluoride7%
- Trihalomethanes6%
- Aluminium6%
- Mercury4%
- Bromate4%
- Iron3%
- Turbidity3%
- Lead3%
- Arsenic2%
- Manganese2%
- Boron2%
- Nitrite2%
- Selenium1%
- Antimony<1%
- Cadmium<1%
- Chromium<1%
- Conductivity 559 µS/cm
- Coliform Bacteria none found
- E. coli none found
- Phosphate 0.971 mg/L
All 25 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Nitrate | 45.7 mg/L | 50 mg/L | 91% |
| Conductivity | 559 µS/cm | No legal limit | – |
| Turbidity | 0.12 NTU | 4 NTU | 3% |
| Iron | 0.00629 mg/L | 0.2 mg/L | 3% |
| Manganese | 0.00101 mg/L | 0.05 mg/L | 2% |
| Colour | 3 mg/L Pt/Co | 20 mg/L Pt/Co | 15% |
| Coliform Bacteria | 0 count/100ml | Must be zero | None found |
| E. coli | 0 count/100ml | Must be zero | None found |
| Aluminium | 0.0111 mg/L | 0.2 mg/L | 6% |
| Phosphate | 0.971 mg/L | No legal limit | – |
| Nitrite | 0.008 mg/L | 0.5 mg/L | 2% |
| Selenium | 0.00043 mg/L | 0.04 mg/L | 1% |
| Lead | 0.00029 mg/L | 0.01 mg/L | 3% |
| Mercury | 0.00004 mg/L | 0.001 mg/L | 4% |
| Trihalomethanes | 0.00588 mg/L | 0.1 mg/L | 6% |
| Fluoride | 0.1 mg/L | 1.5 mg/L | 7% |
| Bromate | 0.0004 mg/L | 0.01 mg/L | 4% |
| Copper | 0.182 mg/L | 2 mg/L | 9% |
| Arsenic | 0.00021 mg/L | 0.01 mg/L | 2% |
| Antimony | 0.000046 mg/L | 0.005 mg/L | <1% |
| Nickel | 0.00204 mg/L | 0.02 mg/L | 10% |
| Boron | 0.0163 mg/L | 1 mg/L | 2% |
| Chromium | 0.00019 mg/L | 0.05 mg/L | <1% |
| Cadmium | 0.000031 mg/L | 0.005 mg/L | <1% |
| Hardness (as CaCO3) | 292 mg/L | No legal limit | – |
297mg of limescale minerals in every litre
This is the water that furs up kettles
Very hard on the UK scale. It is fine to drink. It is hard on boilers, showers, skin and anything that heats water, and a jug or tap filter will not change that.
Softener quotes for YO15
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Your coastal water is the Yorkshire South, rated moderate
The Environment Agency rated the Yorkshire South as moderate for ecological health in its 2025 assessment, meaning the coastal water is noticeably changed by pollution or engineering. It fails the chemical test, as every river, estuary and stretch of coast in England does, because of long-lasting pollutants such as mercury, PFOS (a forever chemical) and old flame retardants.
None of this is a test of your tap water. Environment Agency record · River health across England
YO15 in short
Tap water in YO15 (East Riding of Yorkshire) is supplied by Yorkshire Water in the East Riding of Yorkshire Central zone and scores 9.0 out of 10, against an England and Wales average of 9.0. 1 of 25 tested substances was close to or over a limit. The latest sample is from 28 September 2026.
- Nitrate is within its legal limit but flagged, at 91% of the 50 mg/L maximumAnything over three quarters of a limit is flagged here as worth watching. It has not gone over. See every reading
- Very hard water at 297 mg/LThe threshold for very hard is 250 mg/L. Expect visible limescale on taps and in kettles in YO15. How hardness is measured
- 8th cleanest of 18 areas tested in HullSquarely mid-table for Hull, between DN14 on 9.2 and HU16 on 8.5. Every area in Hull
Questions about YO15 water
Is YO15 tap water safe to drink?
Based on the latest tests, YO15 (East Riding of Yorkshire) water scores 9/10, which is safe. 1 of 25 tested contaminants exceeded recommended levels. Water is supplied by Yorkshire Water.
What contaminants are in YO15 water?
We tested 25 contaminants in YO15 water. 1 were flagged, including Nitrate.
Who supplies water in YO15?
YO15 (East Riding of Yorkshire) is supplied by Yorkshire Water. You can view their full profile and compliance data on our supplier page.
Is YO15 water hard or soft?
Water in YO15 (East Riding of Yorkshire) has a hardness of 297 mg/L CaCO3, which is classified as very hard. Hard water can cause limescale buildup. A water softener or filter jug may help.
Should I use a water filter in YO15?
With 1 contaminant above recommended levels in YO15, a water filter could help. A filter jug or under-sink filter can reduce most common contaminants. See our filter recommendations for your area.
Are there PFAS forever chemicals in YO15 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for YO15, and the Environment Agency has no PFAS detections in rivers or groundwater within 10 km of it. That reflects where sampling has happened as much as the water itself.
How clean is the coastal water near YO15?
The Environment Agency rated the Yorkshire South as moderate for ecological health in its 2025 assessment, meaning the coastal water is noticeably changed by pollution or engineering. It fails the chemical test, as every river, estuary and stretch of coast in England does, because of long-lasting pollutants such as mercury, PFOS (a forever chemical) and old flame retardants. This is a rating of the coastal water, not of tap water in YO15, which is treated before it reaches homes.
Keep reading
- Best Water Softener UKHarvey, Kinetico, BWT, Monarch and Water2Buy compared, with real costs
- Do I Need a Water Softener?The hardness bands, the symptoms, and a postcode check
- UK Water Hardness MapIs your water hard or soft, and does it matter?
- Best Water Filters UKEvery filter type compared on what it actually removes
- Do I need a water softener?The hardness bands, the symptoms, and when the answer is no
- Best water softener UKHarvey, Kinetico, BWT, Monarch and Water2Buy compared
- Water softener costUnit, fitting and salt, and how long the payback takes
- Installation explainedWhere it goes, the bypass tap, the drain, DIY or plumber
- Harvey vs KineticoThe two premium twin-cylinder brands, side by side
- Softener salt guideTablet, block or granular, and how much you get through
- Salt-free softenersConditioners and electronic descalers, honestly assessed
Nitrate levelsHow to test your waterBest water filtersFilter shower headsWater testing kitsAll of HullUK water rankingsWater hardness checkerWater hardness map
River and groundwater readings near YO15
Environment Agency samples from rivers, groundwater and reservoirs nearby. Not your tap water. For scale they are shown against drinking water limits; rivers are judged against much stricter environmental standards, and on those every river in England fails for chemicals.
Get alerts for your area
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