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tapwater
England and Wales average 9.0

Tap water in YO21, North YorkshireSafe to drink.Moderately soft.

Supplied by Yorkshire Water. 530 samples, 22 substances, latest on 15 September 2026. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.6 / 10

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

What to do about it

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Basic chlorine and taste improvement on a budget

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What's in a glass of YO21 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.

Nickel came closest to a limit, at 17% of it. 17 of 17 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%Copper: 0.0153 mg/L, <1% of the 2 mg/L limitCopper<1%Selenium: 0.00043 mg/L, 1% of the 0.04 mg/L limitSelenium1%Antimony: 0.000071 mg/L, 1% of the 0.005 mg/L limitAntimony1%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%Lead: 0.00026 mg/L, 3% of the 0.01 mg/L limitLead3%Turbidity: 0.12 NTU, 3% of the 4 NTU limitTurbidity3%Bromate: 0.0003 mg/L, 3% of the 0.01 mg/L limitBromate3%Iron: 0.00629 mg/L, 3% of the 0.2 mg/L limitIron3%Aluminium: 0.0111 mg/L, 6% of the 0.2 mg/L limitAluminium6%Nitrate: 3.73 mg/L, 7% of the 50 mg/L limitNitrate7%Nitrite: 0.041 mg/L, 8% of the 0.5 mg/L limitNitrite8%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Trihalomethanes: 0.0159 mg/L, 16% of the 0.1 mg/L limitTrihalomethanes16%Nickel: 0.0034 mg/L, 17% of the 0.02 mg/L limitNickel17%
  1. Nickel17%
  2. Trihalomethanes16%
  3. Colour15%
  4. Nitrite8%
  5. Nitrate7%
  6. Aluminium6%
  7. Iron3%
  8. Turbidity3%
  9. Bromate3%
  10. Lead3%
  11. Manganese2%
  12. Arsenic2%
  13. Antimony1%
  14. Selenium1%
  15. Copper<1%
  16. Cadmium<1%
  17. Chromium<1%
  • Coliform Bacteria none found
  • E. coli none found
  • Conductivity 341 µS/cm
  • Phosphate 0.802 mg/L
All 22 results as a table
SubstanceResultLegal limitShare of limit
Coliform Bacteria0 count/100mlMust be zeroNone found
E. coli0 count/100mlMust be zeroNone found
Nitrite0.041 mg/L0.5 mg/L
8%
Nitrate3.73 mg/L50 mg/L
7%
Turbidity0.12 NTU4 NTU
3%
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Conductivity341 µS/cmNo legal limit–
Iron0.00629 mg/L0.2 mg/L
3%
Aluminium0.0111 mg/L0.2 mg/L
6%
Manganese0.00101 mg/L0.05 mg/L
2%
Phosphate0.802 mg/LNo legal limit–
Bromate0.0003 mg/L0.01 mg/L
3%
Antimony0.000071 mg/L0.005 mg/L
1%
Arsenic0.00019 mg/L0.01 mg/L
2%
Selenium0.00043 mg/L0.04 mg/L
1%
Chromium0.00019 mg/L0.05 mg/L
<1%
Trihalomethanes0.0159 mg/L0.1 mg/L
16%
Nickel0.0034 mg/L0.02 mg/L
17%
Cadmium0.000031 mg/L0.005 mg/L
<1%
Copper0.0153 mg/L2 mg/L
<1%
Lead0.00026 mg/L0.01 mg/L
3%
Hardness (as CaCO3)88.4 mg/LNo legal limit–

73mg of limescale minerals in every litre

Soft water. Kind to kettles, boilers and skin

You will not need a softener here, and you will use less soap and detergent than most of England.

Soft400 mg/L
Outside your tap

Your river is the East Row Beck from Source to North Sea, rated good

The Environment Agency rated the East Row Beck from Source to North Sea as good for ecological health in its 2025 assessment, meaning the river is only slightly changed from its natural state. 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

YO21 in short

Tap water in YO21 (North Yorkshire) is supplied by Yorkshire Water in the North Yorkshire Central zone and scores 9.6 out of 10, against an England and Wales average of 9.0. None of the 22 tested substances came close to a limit. The latest sample is from 15 September 2026.

  • 4th cleanest of 28 areas tested in North YorkshireOnly 3 areas in North Yorkshire scored higher. The best is BD24 on 9.7.
  • 0.6 points above the national average of 9Cleaner than the typical tested district in the UK. Compare every area
  • Nothing tested came within 40% of its legal limitThe highest was Nickel at 17% of the 0.02 mg/L maximum. See every reading

Next door

YO79.5 out of 10 · 250 mg/LHG19.5 out of 10 · 49 mg/LDL78.9 out of 10 · 258 mg/LDL68.9 out of 10 · 249 mg/LYO88.8 out of 10 · 277 mg/LYO119.4 out of 10 · 198 mg/LYO129.4 out of 10 · 199 mg/LYO139.2 out of 10 · 196 mg/LYO149.4 out of 10 · 238 mg/LBD249.7 out of 10 · 77 mg/L

Questions about YO21 water

Is YO21 tap water safe to drink?

Based on the latest tests, YO21 (North Yorkshire) water scores 9.6/10, which is safe. 0 of 22 tested contaminants exceeded recommended levels. Water is supplied by Yorkshire Water.

What contaminants are in YO21 water?

We tested 22 contaminants in YO21 water. None exceeded recommended safe levels.

Who supplies water in YO21?

YO21 (North Yorkshire) is supplied by Yorkshire Water. You can view their full profile and compliance data on our supplier page.

Is YO21 water hard or soft?

Water in YO21 (North Yorkshire) has a hardness of 73 mg/L CaCO3, which is classified as moderately soft. This is a moderate hardness level.

Should I use a water filter in YO21?

YO21 water scored 9.6/10 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 YO21 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for YO21, 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 YO21?

The Environment Agency rated the East Row Beck from Source to North Sea as good for ecological health in its 2025 assessment, meaning the river is only slightly changed from its natural state. 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 YO21, which is treated before it reaches homes.

Keep reading

How to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map

River and groundwater readings near YO21

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
Iron0.52 mg/L0.2 mg/L
Lead0.0129 mg/L0.01 mg/L
Nickel0.0164 mg/L0.02 mg/L
pH8.18 pHNone
Temperature5.8 °CNone
Conductivity194 µS/cmNone
Nitrate0.89 mg/L50 mg/L
Phosphate0.013 mg/LNone
Dissolved Oxygen13.1 mg/LNone
Ammonia0.086 mg/L0.5 mg/L
Nitrite0.0182 mg/L0.5 mg/L
Cadmium0.000185 mg/L0.005 mg/L
Chromium0.0175 mg/L0.05 mg/L
Copper0.0182 mg/L2 mg/L

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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