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tapwater
England and Wales average 9.0

Tap water in DN8, DoncasterNitrite is over the limit.Very hard.

Supplied by Yorkshire Water. 730 samples, 25 substances, latest on 15 September 2026. Nitrite came in above the legal limit. Everything else passed.

Get softener quotes for DN8See everything that was tested

8.8 / 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.

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What's in a glass of DN8 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 110% of it.

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: 0.0129 mg/L, <1% of the 2 mg/L limitCopper<1%Nickel: 0.00017 mg/L, <1% of the 0.02 mg/L limitNickel<1%Lead: 0.00009 mg/L, <1% of the 0.01 mg/L limitLead<1%Selenium: 0.00043 mg/L, 1% of the 0.04 mg/L limitSelenium1%Antimony: 0.000099 mg/L, 2% of the 0.005 mg/L limitAntimony2%Manganese: 0.00101 mg/L, 2% of the 0.05 mg/L limitManganese2%Boron: 0.0262 mg/L, 3% of the 1 mg/L limitBoron3%Turbidity: 0.11 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%Mercury: 0.00004 mg/L, 4% of the 0.001 mg/L limitMercury4%Fluoride: 0.07 mg/L, 5% of the 1.5 mg/L limitFluoride5%Aluminium: 0.0111 mg/L, 6% of the 0.2 mg/L limitAluminium6%Trihalomethanes: 0.00997 mg/L, 10% of the 0.1 mg/L limitTrihalomethanes10%Arsenic: 0.00109 mg/L, 11% of the 0.01 mg/L limitArsenic11%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Nitrate: 27 mg/L, 54% of the 50 mg/L limitNitrate54%Nitrite: 0.55 mg/L, 110% of the 0.5 mg/L limitNitrite110%
  1. Nitrite110%
  2. Nitrate54%
  3. Colour15%
  4. Arsenic11%
  5. Trihalomethanes10%
  6. Aluminium6%
  7. Fluoride5%
  8. Mercury4%
  9. Iron3%
  10. Bromate3%
  11. Turbidity3%
  12. Boron3%
  13. Manganese2%
  14. Antimony2%
  15. Selenium1%
  16. Lead<1%
  17. Nickel<1%
  18. Copper<1%
  19. Cadmium<1%
  20. Chromium<1%
  • Coliform Bacteria none found
  • E. coli none found
  • Conductivity 506 µS/cm
  • Phosphate 1.06 mg/L
All 25 results as a table
SubstanceResultLegal limitShare of limit
Nitrite0.55 mg/L0.5 mg/L
110%
Coliform Bacteria0 count/100mlMust be zeroNone found
E. coli0 count/100mlMust be zeroNone found
Manganese0.00101 mg/L0.05 mg/L
2%
Aluminium0.0111 mg/L0.2 mg/L
6%
Conductivity506 µS/cmNo legal limit–
Nitrate27 mg/L50 mg/L
54%
Iron0.00629 mg/L0.2 mg/L
3%
Turbidity0.11 NTU4 NTU
3%
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Phosphate1.06 mg/LNo legal limit–
Nickel0.00017 mg/L0.02 mg/L
<1%
Bromate0.0003 mg/L0.01 mg/L
3%
Chromium0.00019 mg/L0.05 mg/L
<1%
Cadmium0.000031 mg/L0.005 mg/L
<1%
Boron0.0262 mg/L1 mg/L
3%
Mercury0.00004 mg/L0.001 mg/L
4%
Selenium0.00043 mg/L0.04 mg/L
1%
Arsenic0.00109 mg/L0.01 mg/L
11%
Antimony0.000099 mg/L0.005 mg/L
2%
Trihalomethanes0.00997 mg/L0.1 mg/L
10%
Copper0.0129 mg/L2 mg/L
<1%
Fluoride0.07 mg/L1.5 mg/L
5%
Lead0.00009 mg/L0.01 mg/L
<1%
Hardness (as CaCO3)277 mg/LNo 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.

Soft400 mg/L

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Outside your tap

Your river is the North Soak Drain Catchment (trib of Torne/Three Rivers), rated moderate

The Environment Agency rated the North Soak Drain Catchment (trib of Torne/Three Rivers) as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by dissolved oxygen, ammonia and insects and other small river life. 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

DN8 in short

Tap water in DN8 (Doncaster) is supplied by Yorkshire Water in the Doncaster Central zone and scores 8.8 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 15 September 2026.

  • Nitrite was measured at 0.55 mg/L, 10% over the UK limitIt is the only one of 25 tested substances to go over its limit. See the full results
  • The lowest score of the 10 areas tested in DoncasterDN8 scores 8.8 out of 10. The best in Doncaster, DN6, scores 9.3.
  • Very hard water at 258 mg/LThe threshold for very hard is 250 mg/L. Expect visible limescale on taps and in kettles in DN8. How hardness is measured

Next door

DN128.8 out of 10 · 265 mg/LDN29.2 out of 10 · 252 mg/LDN48.8 out of 10 · 258 mg/LDN79.2 out of 10 · 262 mg/LDN39.2 out of 10 · 252 mg/LDN59.1 out of 10 · 257 mg/LDN19.2 out of 10 · 253 mg/LDN119.2 out of 10 · 246 mg/LDN69.3 out of 10 · 265 mg/L

Questions about DN8 water

Is DN8 tap water safe to drink?

Based on the latest tests, DN8 (Doncaster) water scores 8.8/10, which is safe. 1 of 25 tested contaminants exceeded recommended levels. Water is supplied by Yorkshire Water.

What contaminants are in DN8 water?

We tested 25 contaminants in DN8 water. 1 were flagged, including Nitrite.

Who supplies water in DN8?

DN8 (Doncaster) is supplied by Yorkshire Water. You can view their full profile and compliance data on our supplier page.

Is DN8 water hard or soft?

Water in DN8 (Doncaster) 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 DN8?

With 1 contaminant above recommended levels in DN8, 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 DN8 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for DN8, 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 DN8?

The Environment Agency rated the North Soak Drain Catchment (trib of Torne/Three Rivers) as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by dissolved oxygen, ammonia and insects and other small river life. 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 DN8, which is treated before it reaches homes.

Keep reading

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

River and groundwater readings near DN8

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
Manganese0.159 mg/L0.05 mg/L
pH7.76 pHNone
Temperature13.5 °CNone
Conductivity947 µS/cmNone
Ammonia0.055 mg/L0.5 mg/L
Nitrate3.4 mg/L50 mg/L
Nitrite0.038 mg/L0.5 mg/L
Phosphate0.011 mg/LNone
Dissolved Oxygen9.19 mg/LNone
Iron0.0498 mg/L0.2 mg/L
Hardness (as CaCO3)781 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