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tapwater
England and Wales average 9.0

Tap water in YO42, East Riding of YorkshireSafe to drink.Very hard.

Supplied by Yorkshire Water. 854 samples, 25 substances, latest on 17 September 2026. Everything is inside the legal limit, and nothing comes close to it.

Get softener quotes for YO42See everything that was tested

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 296 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.

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What's in a glass of YO42 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 74% of it. 18 of 20 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitChromium: 0.00019 mg/L, <1% of the 0.05 mg/L limitChromium<1%Cadmium: 0.000031 mg/L, <1% of the 0.005 mg/L limitCadmium<1%Selenium: 0.00043 mg/L, 1% of the 0.04 mg/L limitSelenium1%Nitrite: 0.008 mg/L, 2% of the 0.5 mg/L limitNitrite2%Antimony: 0.000083 mg/L, 2% of the 0.005 mg/L limitAntimony2%Arsenic: 0.00022 mg/L, 2% of the 0.01 mg/L limitArsenic2%Boron: 0.0234 mg/L, 2% of the 1 mg/L limitBoron2%Turbidity: 0.11 NTU, 3% of the 4 NTU limitTurbidity3%Manganese: 0.00178 mg/L, 4% of the 0.05 mg/L limitManganese4%Mercury: 0.00004 mg/L, 4% of the 0.001 mg/L limitMercury4%Copper: 0.0844 mg/L, 4% of the 2 mg/L limitCopper4%Iron: 0.00928 mg/L, 5% of the 0.2 mg/L limitIron5%Aluminium: 0.0113 mg/L, 6% of the 0.2 mg/L limitAluminium6%Fluoride: 0.09 mg/L, 6% of the 1.5 mg/L limitFluoride6%Nickel: 0.00158 mg/L, 8% of the 0.02 mg/L limitNickel8%Lead: 0.00099 mg/L, 10% of the 0.01 mg/L limitLead10%Bromate: 0.0011 mg/L, 11% of the 0.01 mg/L limitBromate11%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Trihalomethanes: 0.0283 mg/L, 28% of the 0.1 mg/L limitTrihalomethanes28%Nitrate: 36.8 mg/L, 74% of the 50 mg/L limitNitrate74%
  1. Nitrate74%
  2. Trihalomethanes28%
  3. Colour15%
  4. Bromate11%
  5. Lead10%
  6. Nickel8%
  7. Fluoride6%
  8. Aluminium6%
  9. Iron5%
  10. Copper4%
  11. Mercury4%
  12. Manganese4%
  13. Turbidity3%
  14. Boron2%
  15. Arsenic2%
  16. Antimony2%
  17. Nitrite2%
  18. Selenium1%
  19. Cadmium<1%
  20. Chromium<1%
  • E. coli none found
  • Coliform Bacteria none found
  • Phosphate 1.08 mg/L
  • Conductivity 582 µS/cm
All 25 results as a table
SubstanceResultLegal limitShare of limit
E. coli0 count/100mlMust be zeroNone found
Coliform Bacteria0 count/100mlMust be zeroNone found
Phosphate1.08 mg/LNo legal limit–
Aluminium0.0113 mg/L0.2 mg/L
6%
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Iron0.00928 mg/L0.2 mg/L
5%
Manganese0.00178 mg/L0.05 mg/L
4%
Conductivity582 µS/cmNo legal limit–
Turbidity0.11 NTU4 NTU
3%
Fluoride0.09 mg/L1.5 mg/L
6%
Mercury0.00004 mg/L0.001 mg/L
4%
Selenium0.00043 mg/L0.04 mg/L
1%
Arsenic0.00022 mg/L0.01 mg/L
2%
Antimony0.000083 mg/L0.005 mg/L
2%
Copper0.0844 mg/L2 mg/L
4%
Bromate0.0011 mg/L0.01 mg/L
11%
Nickel0.00158 mg/L0.02 mg/L
8%
Chromium0.00019 mg/L0.05 mg/L
<1%
Cadmium0.000031 mg/L0.005 mg/L
<1%
Boron0.0234 mg/L1 mg/L
2%
Nitrite0.008 mg/L0.5 mg/L
2%
Nitrate36.8 mg/L50 mg/L
74%
Lead0.00099 mg/L0.01 mg/L
10%
Trihalomethanes0.0283 mg/L0.1 mg/L
28%
Hardness (as CaCO3)297 mg/LNo legal limit–

296mg 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.

Soft400 mg/L

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Outside your tap

Your river is the Pocklington Beck from Bielby Bk to River Derwent, rated moderate

The Environment Agency rated the Pocklington Beck from Bielby Bk to River Derwent as moderate for ecological health in its 2025 assessment, meaning the river 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

Within 10 km

25

forever-chemical detections in nearby rivers and groundwater

At 1 site. The highest was PFOA at 0.014 µg/L, at RSN0432 Blackfoss Bck at Whiteland Field, 6.8 km away, in April 2026. These are river and borehole samples, not tests of your tap water.

Every PFAS sample around York · Which filters remove PFAS · PFAS explained

YO42 in short

Tap water in YO42 (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. None of the 25 tested substances came close to a limit. The latest sample is from 17 September 2026.

  • Nitrate is the reading closest to its limit, at 74% of the 50 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
  • Very hard water at 296 mg/LThe threshold for very hard is 250 mg/L. Expect visible limescale on taps and in kettles in YO42. How hardness is measured
  • 11th 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

Next door

HU119.0 out of 10 · 231 mg/LHU189.0 out of 10 · 242 mg/LHU159.1 out of 10 · 296 mg/LHU139.0 out of 10 · 315 mg/LHU178.6 out of 10 · 337 mg/LHU148.8 out of 10 · 302 mg/LHU168.5 out of 10 · 373 mg/LHU199.0 out of 10 · 262 mg/LHU208.8 out of 10 · 315 mg/LHU108.9 out of 10 · 366 mg/L

Questions about YO42 water

Is YO42 tap water safe to drink?

Based on the latest tests, YO42 (East Riding of Yorkshire) water scores 9/10, which is safe. 0 of 25 tested contaminants exceeded recommended levels. Water is supplied by Yorkshire Water.

What contaminants are in YO42 water?

We tested 25 contaminants in YO42 water. None exceeded recommended safe levels. PFAS (forever chemicals) were also measured in rivers and groundwater within 10 km, though not in the tap-water tests themselves.

Who supplies water in YO42?

YO42 (East Riding of Yorkshire) is supplied by Yorkshire Water. You can view their full profile and compliance data on our supplier page.

Is YO42 water hard or soft?

Water in YO42 (East Riding of Yorkshire) has a hardness of 296 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 YO42?

YO42 water scored 9/10 with no contaminants above recommended levels. A filter is optional but can improve taste, especially if you notice a chlorine flavour. See our filter recommendations for your area.

Are there PFAS forever chemicals in YO42 water?

The tap-water tests we hold for YO42 do not include a PFAS result. Environment Agency monitoring found PFAS in 25 river and groundwater samples from 1 sites within 10 km of YO42, the highest being PFOA at 0.014 µg/L about 6.8 km away. These are environmental samples, not tests of tap water. The UK currently has no legal limit for PFAS in drinking water; the Drinking Water Inspectorate uses a 0.1 µg/L guideline for individual compounds. Reverse osmosis filters can reduce PFAS levels.

How clean is the river near YO42?

The Environment Agency rated the Pocklington Beck from Bielby Bk to River Derwent as moderate for ecological health in its 2025 assessment, meaning the river 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 river, not of tap water in YO42, which is treated before it reaches homes.

Keep reading

PFAS explainedHow to test your waterBest water filtersFilter shower headsWater testing kitsAll of HullUK water rankingsWater hardness checkerWater hardness map

River and groundwater readings near YO42

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.

SubstanceReadingDrinking water limit
pH8.35 pHNone
Zinc0.0015 mg/LNone
Nickel0.00025 mg/L0.02 mg/L
Copper0.00042 mg/L2 mg/L
Temperature8.4 °CNone
Conductivity648 µS/cmNone
Ammonia0.038 mg/L0.5 mg/L
Nitrate12 mg/L50 mg/L
Nitrite0.018 mg/L0.5 mg/L
Phosphate0.052 mg/LNone
Dissolved Oxygen12 mg/LNone
Hardness (as CaCO3)366 mg/LNone

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Source: Yorkshire Water test results, published through the Stream Water Data Portal; rivers and PFAS from the Environment Agency. Page updated . How we score · Where the data comes from