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tapwater
England and Wales average 9.0

Tap water in YO24, YorkSafe to drink.Very hard.

Supplied by Yorkshire Water. 1,076 samples, 25 substances, latest on 29 September 2026. Everything is inside the legal limit, and nothing comes close to it.

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9.1 / 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 279 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 YO24 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 29% of it. 19 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: 0.000044 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%Arsenic: 0.00019 mg/L, 2% of the 0.01 mg/L limitArsenic2%Manganese: 0.00101 mg/L, 2% of the 0.05 mg/L limitManganese2%Turbidity: 0.11 NTU, 3% of the 4 NTU limitTurbidity3%Lead: 0.00028 mg/L, 3% of the 0.01 mg/L limitLead3%Boron: 0.0356 mg/L, 4% of the 1 mg/L limitBoron4%Mercury: 0.00004 mg/L, 4% of the 0.001 mg/L limitMercury4%Nickel: 0.00088 mg/L, 4% of the 0.02 mg/L limitNickel4%Antimony: 0.000272 mg/L, 5% of the 0.005 mg/L limitAntimony5%Aluminium: 0.0111 mg/L, 6% of the 0.2 mg/L limitAluminium6%Copper: 0.195 mg/L, 10% of the 2 mg/L limitCopper10%Fluoride: 0.18 mg/L, 12% of the 1.5 mg/L limitFluoride12%Iron: 0.0269 mg/L, 13% of the 0.2 mg/L limitIron13%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Bromate: 0.0018 mg/L, 18% of the 0.01 mg/L limitBromate18%Trihalomethanes: 0.0184 mg/L, 18% of the 0.1 mg/L limitTrihalomethanes18%Nitrate: 14.5 mg/L, 29% of the 50 mg/L limitNitrate29%
  1. Nitrate29%
  2. Trihalomethanes18%
  3. Bromate18%
  4. Colour15%
  5. Iron13%
  6. Fluoride12%
  7. Copper10%
  8. Aluminium6%
  9. Antimony5%
  10. Nickel4%
  11. Mercury4%
  12. Boron4%
  13. Lead3%
  14. Turbidity3%
  15. Manganese2%
  16. Arsenic2%
  17. Nitrite2%
  18. Selenium1%
  19. Cadmium<1%
  20. Chromium<1%
  • Conductivity 659 µS/cm
  • Coliform Bacteria none found
  • E. coli none found
  • Phosphate 0 mg/L
All 25 results as a table
SubstanceResultLegal limitShare of limit
Nitrite0.008 mg/L0.5 mg/L
2%
Nitrate14.5 mg/L50 mg/L
29%
Conductivity659 µS/cmNo legal limit–
Turbidity0.11 NTU4 NTU
3%
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Coliform Bacteria0 count/100mlMust be zeroNone found
E. coli0 count/100mlMust be zeroNone found
Aluminium0.0111 mg/L0.2 mg/L
6%
Iron0.0269 mg/L0.2 mg/L
13%
Manganese0.00101 mg/L0.05 mg/L
2%
Phosphate0 mg/LNo legal limit–
Trihalomethanes0.0184 mg/L0.1 mg/L
18%
Bromate0.0018 mg/L0.01 mg/L
18%
Nickel0.00088 mg/L0.02 mg/L
4%
Chromium0.00019 mg/L0.05 mg/L
<1%
Cadmium0.000044 mg/L0.005 mg/L
<1%
Boron0.0356 mg/L1 mg/L
4%
Lead0.00028 mg/L0.01 mg/L
3%
Mercury0.00004 mg/L0.001 mg/L
4%
Selenium0.00043 mg/L0.04 mg/L
1%
Arsenic0.00019 mg/L0.01 mg/L
2%
Antimony0.000272 mg/L0.005 mg/L
5%
Fluoride0.18 mg/L1.5 mg/L
12%
Copper0.195 mg/L2 mg/L
10%
Hardness (as CaCO3)325 mg/LNo legal limit–

279mg 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 Holgate Beck to Ouse, rated moderate

The Environment Agency rated the Holgate Beck to Ouse 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, phosphate 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.

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

Within 10 km

106

forever-chemical detections in nearby rivers and groundwater

At 6 sites. The highest was 6:2 FTSA at 0.01 µg/L, at RSN0176 Ouse at Skeldergate Bridge, 2.5 km away, in December 2023. These are river and borehole samples, not tests of your tap water.

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

YO24 in short

Tap water in YO24 (York) is supplied by Yorkshire Water in the York Central zone and scores 9.1 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 29 September 2026.

  • Very hard water at 279 mg/LThe threshold for very hard is 250 mg/L. Expect visible limescale on taps and in kettles in YO24. How hardness is measured
  • 5th cleanest of 9 areas tested in YorkSquarely mid-table for York, between YO23 on 9.3 and YO10 on 8.7. Every area in York
  • PFAS found at 6 monitoring sites within 10 kmThose are river and groundwater samples, not tap water. The highest was 6:2 FTSA about 2.5 km away. What was measured

Next door

YO318.8 out of 10 · 238 mg/LYO108.7 out of 10 · 268 mg/LYO19.1 out of 10 · 260 mg/LYO198.9 out of 10 · 307 mg/LYO239.3 out of 10 · 270 mg/LYO269.1 out of 10 · 254 mg/LYO309.2 out of 10 · 249 mg/LYO329.2 out of 10 · 230 mg/L

Questions about YO24 water

Is YO24 tap water safe to drink?

Based on the latest tests, YO24 (York) water scores 9.1/10, which is safe. 0 of 25 tested contaminants exceeded recommended levels. Water is supplied by Yorkshire Water.

What contaminants are in YO24 water?

We tested 25 contaminants in YO24 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 YO24?

YO24 (York) is supplied by Yorkshire Water. You can view their full profile and compliance data on our supplier page.

Is YO24 water hard or soft?

Water in YO24 (York) has a hardness of 279 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 YO24?

YO24 water scored 9.1/10 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 YO24 water?

The tap-water tests we hold for YO24 do not include a PFAS result. Environment Agency monitoring found PFAS in 106 river and groundwater samples from 6 sites within 10 km of YO24, the highest being 6:2 FTSA at 0.01 µg/L about 2.5 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 YO24?

The Environment Agency rated the Holgate Beck to Ouse 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, phosphate 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. This is a rating of the river, not of tap water in YO24, which is treated before it reaches homes.

Keep reading

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

River and groundwater readings near YO24

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
pH8.06 pHNone
Temperature11.6 °CNone
Conductivity818 µS/cmNone
Ammonia0.077 mg/L0.5 mg/L
Nitrate8.6 mg/L50 mg/L
Nitrite0.039 mg/L0.5 mg/L
Phosphate0.17 mg/LNone
Dissolved Oxygen9.77 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