Tap water in HU12, East Riding of YorkshireNitrite is over the limit.Very hard.
Supplied by Yorkshire Water. 930 samples, 25 substances, latest on 24 September 2026. Nitrite came in above the legal limit. Everything else passed.
8.9 / 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 258 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
Maximum contaminant removal including PFAS and fluoride
Waterdrop 10UA Under Sink
£70typical price
High-volume under-sink filtration without RO complexity
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What's in a glass of HU12 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.
Nitrite is over its legal limit, at 142% of it.
- Nitrite142%
- Nitrate71%
- Colour15%
- Iron15%
- Trihalomethanes14%
- Fluoride6%
- Nickel6%
- Aluminium6%
- Turbidity5%
- Bromate4%
- Mercury4%
- Boron3%
- Manganese2%
- Arsenic2%
- Antimony1%
- Selenium1%
- Lead<1%
- Cadmium<1%
- Chromium<1%
- Copper<1%
- Coliform Bacteria none found
- E. coli none found
- Conductivity 421 µS/cm
- Phosphate 0.83 mg/L
All 25 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Nitrite | 0.71 mg/L | 0.5 mg/L | 142% |
| 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% |
| Iron | 0.0295 mg/L | 0.2 mg/L | 15% |
| Manganese | 0.00101 mg/L | 0.05 mg/L | 2% |
| Turbidity | 0.21 NTU | 4 NTU | 5% |
| Conductivity | 421 µS/cm | No legal limit | – |
| Colour | 3 mg/L Pt/Co | 20 mg/L Pt/Co | 15% |
| Phosphate | 0.83 mg/L | No legal limit | – |
| Nitrate | 35.5 mg/L | 50 mg/L | 71% |
| Fluoride | 0.09 mg/L | 1.5 mg/L | 6% |
| Antimony | 0.000059 mg/L | 0.005 mg/L | 1% |
| Selenium | 0.00043 mg/L | 0.04 mg/L | 1% |
| Arsenic | 0.00019 mg/L | 0.01 mg/L | 2% |
| Lead | 0.00009 mg/L | 0.01 mg/L | <1% |
| Bromate | 0.0004 mg/L | 0.01 mg/L | 4% |
| Trihalomethanes | 0.0138 mg/L | 0.1 mg/L | 14% |
| Copper | 0.00206 mg/L | 2 mg/L | <1% |
| Mercury | 0.00004 mg/L | 0.001 mg/L | 4% |
| Boron | 0.0337 mg/L | 1 mg/L | 3% |
| Nickel | 0.00118 mg/L | 0.02 mg/L | 6% |
| Chromium | 0.00019 mg/L | 0.05 mg/L | <1% |
| Cadmium | 0.000031 mg/L | 0.005 mg/L | <1% |
| Hardness (as CaCO3) | 212 mg/L | No legal limit | – |
258mg 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 HU12
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Your river is the Sands/Keyingham/Roos Dr from Source to Humber, rated moderate
The Environment Agency rated the Sands/Keyingham/Roos Dr from Source to Humber as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by insects and other small river life, dissolved oxygen and phosphate. 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
HU12 in short
Tap water in HU12 (East Riding of Yorkshire) is supplied by Yorkshire Water in the East Riding of Yorkshire Central zone and scores 8.9 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 24 September 2026.
- Nitrite was measured at 0.71 mg/L, 42% over the UK limitIt is the only one of 25 tested substances to go over its limit. See the full results
- Very hard water at 258 mg/LThe threshold for very hard is 250 mg/L. Expect visible limescale on taps and in kettles in HU12. How hardness is measured
- 13th cleanest of 18 areas tested in Hull5 areas in Hull scored lower. The best is DN14 on 9.2. Every area in Hull
Questions about HU12 water
Is HU12 tap water safe to drink?
Based on the latest tests, HU12 (East Riding of Yorkshire) water scores 8.9/10, which is safe. 1 of 25 tested contaminants exceeded recommended levels. Water is supplied by Yorkshire Water.
What contaminants are in HU12 water?
We tested 25 contaminants in HU12 water. 1 were flagged, including Nitrite.
Who supplies water in HU12?
HU12 (East Riding of Yorkshire) is supplied by Yorkshire Water. You can view their full profile and compliance data on our supplier page.
Is HU12 water hard or soft?
Water in HU12 (East Riding of Yorkshire) has a hardness of 258 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 HU12?
With 1 contaminant above recommended levels in HU12, 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 HU12 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for HU12, 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 river near HU12?
The Environment Agency rated the Sands/Keyingham/Roos Dr from Source to Humber as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by insects and other small river life, dissolved oxygen and phosphate. 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 river, not of tap water in HU12, 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
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- 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
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- 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 HU12
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
We'll email you when water quality data changes for HU12.