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tapwater
England and Wales average 9.0

Tap water in YO43, East Riding of YorkshireNitrite is over the limit.Very hard.

Supplied by Yorkshire Water. 564 samples, 24 substances, latest on 25 September 2026. Nitrite came in above the legal limit. Everything else passed.

See the filter we recommendSee everything that was tested

8.7 / 10

The tank is as full as the score. The specks are the minerals that make water hard.

What to do about it

Waterdrop G3P600 Reverse Osmosis

Waterdrop G3P600 Reverse Osmosis

£550typical price

Removes nitrate, the result that stood out in YO43.

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Stop the limescale

At 264 mg/L a softener is the only thing that stops limescale. Filters do not soften water.

Get softener quotes for YO43

Osmio PRO-III Ultimate Whole House

£499typical price

Removes nitrate, the result that stood out in YO43.

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What's in a glass of YO43 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 154% of it.

0%25%50%75%limitLegal limitCopper: 0.00332 mg/L, <1% of the 2 mg/L limitCopper<1%Chromium: 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%Arsenic: 0.00019 mg/L, 2% of the 0.01 mg/L limitArsenic2%Antimony: 0.000098 mg/L, 2% of the 0.005 mg/L limitAntimony2%Boron: 0.0256 mg/L, 3% of the 1 mg/L limitBoron3%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%Fluoride: 0.08 mg/L, 5% of the 1.5 mg/L limitFluoride5%Aluminium: 0.0113 mg/L, 6% of the 0.2 mg/L limitAluminium6%Nickel: 0.00125 mg/L, 6% of the 0.02 mg/L limitNickel6%Iron: 0.0129 mg/L, 6% of the 0.2 mg/L limitIron6%Bromate: 0.001 mg/L, 10% of the 0.01 mg/L limitBromate10%Lead: 0.00125 mg/L, 13% of the 0.01 mg/L limitLead13%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Trihalomethanes: 0.0328 mg/L, 33% of the 0.1 mg/L limitTrihalomethanes33%Nitrate: 38.5 mg/L, 77% of the 50 mg/L limitNitrate77%Nitrite: 0.77 mg/L, 154% of the 0.5 mg/L limitNitrite154%
  1. Nitrite154%
  2. Nitrate77%
  3. Trihalomethanes33%
  4. Colour15%
  5. Lead13%
  6. Bromate10%
  7. Iron6%
  8. Nickel6%
  9. Aluminium6%
  10. Fluoride5%
  11. Mercury4%
  12. Manganese4%
  13. Turbidity3%
  14. Boron3%
  15. Antimony2%
  16. Arsenic2%
  17. Selenium1%
  18. Cadmium<1%
  19. Chromium<1%
  20. Copper<1%
  • Coliform Bacteria none found
  • Conductivity 638 µS/cm
  • E. coli none found
  • Phosphate 1.08 mg/L
All 24 results as a table
SubstanceResultLegal limitShare of limit
Nitrite0.77 mg/L0.5 mg/L
154%
Nitrate38.5 mg/L50 mg/L
77%
Coliform Bacteria0 count/100mlMust be zeroNone found
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Conductivity638 µS/cmNo legal limit–
E. coli0 count/100mlMust be zeroNone found
Turbidity0.11 NTU4 NTU
3%
Phosphate1.08 mg/LNo legal limit–
Iron0.0129 mg/L0.2 mg/L
6%
Manganese0.00178 mg/L0.05 mg/L
4%
Aluminium0.0113 mg/L0.2 mg/L
6%
Trihalomethanes0.0328 mg/L0.1 mg/L
33%
Boron0.0256 mg/L1 mg/L
3%
Nickel0.00125 mg/L0.02 mg/L
6%
Chromium0.00019 mg/L0.05 mg/L
<1%
Cadmium0.000031 mg/L0.005 mg/L
<1%
Selenium0.00043 mg/L0.04 mg/L
1%
Fluoride0.08 mg/L1.5 mg/L
5%
Copper0.00332 mg/L2 mg/L
<1%
Arsenic0.00019 mg/L0.01 mg/L
2%
Antimony0.000098 mg/L0.005 mg/L
2%
Mercury0.00004 mg/L0.001 mg/L
4%
Bromate0.001 mg/L0.01 mg/L
10%
Lead0.00125 mg/L0.01 mg/L
13%

264mg of limescale minerals in every litre, typical for the YO area. YO43 has no reading of its own.

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 Foulness from Black Beck to Market Weighton Canal, rated poor

The Environment Agency rated the Foulness from Black Beck to Market Weighton Canal as poor for ecological health in its 2025 assessment, meaning the river is badly affected, with much of the expected wildlife missing. It is held back by water plants and algae and ammonia. 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. Its ecological rating has dropped since the previous assessment.

None of this is a test of your tap water. Environment Agency record · River health across England

YO43 in short

Tap water in YO43 (East Riding of Yorkshire) is supplied by Yorkshire Water in the East Riding of Yorkshire Central zone and scores 8.7 out of 10, against an England and Wales average of 9.0. 2 of 24 tested substances were close to or over a limit. The latest sample is from 25 September 2026.

  • Nitrite was measured at 0.77 mg/L, 54% over the UK limitIt is the furthest over its limit of the 2 substances flagged here. See the full results
  • 16th cleanest of 18 areas tested in Hull2 areas in Hull scored lower. The best is DN14 on 9.2. Every area in Hull
  • Very hard water at 264 mg/LThe threshold for very hard is 250 mg/L. Expect visible limescale on taps and in kettles across the YO postcode area. How hardness is measured

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 YO43 water

Is YO43 tap water safe to drink?

Based on the latest tests, YO43 (East Riding of Yorkshire) water scores 8.7/10, which is safe. 2 of 24 tested contaminants exceeded recommended levels. Water is supplied by Yorkshire Water.

What contaminants are in YO43 water?

We tested 24 contaminants in YO43 water. 2 were flagged, including Nitrite, Nitrate.

Who supplies water in YO43?

YO43 (East Riding of Yorkshire) is supplied by Yorkshire Water. You can view their full profile and compliance data on our supplier page.

Is YO43 water hard or soft?

No hardness reading has been published for YO43 itself. Across the YO postcode area the typical value is 264 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 YO43?

With 2 contaminants above recommended levels in YO43, 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 YO43 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for YO43, 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 YO43?

The Environment Agency rated the Foulness from Black Beck to Market Weighton Canal as poor for ecological health in its 2025 assessment, meaning the river is badly affected, with much of the expected wildlife missing. It is held back by water plants and algae and ammonia. 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. Its ecological rating has dropped since the previous assessment. This is a rating of the river, not of tap water in YO43, which is treated before it reaches homes.

Keep reading

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 YO43

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
Iron0.335 mg/L0.2 mg/L
pH8.44 pHNone
Temperature8.4 °CNone
Conductivity686 µS/cmNone
Nitrate11 mg/L50 mg/L
Nitrite0.026 mg/L0.5 mg/L
Phosphate0.046 mg/LNone
Dissolved Oxygen12.8 mg/LNone
Nickel0.00294 mg/L0.02 mg/L
Copper0.00193 mg/L2 mg/L
Ammonia0.153 mg/L0.5 mg/L
PFAS (total)0.00134 µg/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