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tapwater
England and Wales average 9.0

Tap water in HU7, Kingston upon Hull, City ofSafe to drink.Very hard.

Supplied by Yorkshire Water. 1,188 samples, 25 substances, latest on 24 September 2026. Everything is inside the legal limit. One result, nitrite, sits close to the line.

Get softener quotes for HU7See 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 271 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 HU7 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 came closest to a limit, at 100% of it. 18 of 20 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitCopper: 0.00463 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%Lead: 0.00013 mg/L, 1% of the 0.01 mg/L limitLead1%Antimony: 0.000068 mg/L, 1% of the 0.005 mg/L limitAntimony1%Boron: 0.0175 mg/L, 2% of the 1 mg/L limitBoron2%Arsenic: 0.00022 mg/L, 2% of the 0.01 mg/L limitArsenic2%Turbidity: 0.11 NTU, 3% of the 4 NTU limitTurbidity3%Iron: 0.00629 mg/L, 3% of the 0.2 mg/L limitIron3%Nickel: 0.00064 mg/L, 3% of the 0.02 mg/L limitNickel3%Mercury: 0.00004 mg/L, 4% of the 0.001 mg/L limitMercury4%Manganese: 0.00215 mg/L, 4% of the 0.05 mg/L limitManganese4%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: 0.00938 mg/L, 9% of the 0.1 mg/L limitTrihalomethanes9%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%Nitrate: 25.1 mg/L, 50% of the 50 mg/L limitNitrate50%Nitrite: 0.5 mg/L, 100% of the 0.5 mg/L limitNitrite100%
  1. Nitrite100%
  2. Nitrate50%
  3. Colour15%
  4. Bromate11%
  5. Trihalomethanes9%
  6. Aluminium6%
  7. Fluoride5%
  8. Manganese4%
  9. Mercury4%
  10. Nickel3%
  11. Iron3%
  12. Turbidity3%
  13. Arsenic2%
  14. Boron2%
  15. Antimony1%
  16. Lead1%
  17. Selenium1%
  18. Cadmium<1%
  19. Chromium<1%
  20. Copper<1%
  • Phosphate 0.869 mg/L
  • E. coli none found
  • Coliform Bacteria none found
  • Conductivity 442 µS/cm
All 25 results as a table
SubstanceResultLegal limitShare of limit
Nitrite0.5 mg/L0.5 mg/L
100%
Phosphate0.869 mg/LNo legal limit–
E. coli0 count/100mlMust be zeroNone found
Coliform Bacteria0 count/100mlMust be zeroNone found
Conductivity442 µS/cmNo legal limit–
Turbidity0.11 NTU4 NTU
3%
Selenium0.00043 mg/L0.04 mg/L
1%
Lead0.00013 mg/L0.01 mg/L
1%
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Nitrate25.1 mg/L50 mg/L
50%
Chromium0.00019 mg/L0.05 mg/L
<1%
Cadmium0.000031 mg/L0.005 mg/L
<1%
Boron0.0175 mg/L1 mg/L
2%
Fluoride0.07 mg/L1.5 mg/L
5%
Arsenic0.00022 mg/L0.01 mg/L
2%
Antimony0.000068 mg/L0.005 mg/L
1%
Nickel0.00064 mg/L0.02 mg/L
3%
Copper0.00463 mg/L2 mg/L
<1%
Mercury0.00004 mg/L0.001 mg/L
4%
Bromate0.0011 mg/L0.01 mg/L
11%
Trihalomethanes0.00938 mg/L0.1 mg/L
9%
Iron0.00629 mg/L0.2 mg/L
3%
Manganese0.00215 mg/L0.05 mg/L
4%
Aluminium0.0111 mg/L0.2 mg/L
6%
Hardness (as CaCO3)191 mg/LNo legal limit–

271mg 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 Holderness Drain from Foredyke Stream to Humber, rated moderate

The Environment Agency rated the Holderness Drain from Foredyke Stream to Humber as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by fish, insects and other small river life 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

61

forever-chemical detections in nearby rivers and groundwater

At 3 sites. The highest was 6:2 FTSA at 0.053 µg/L, at Poplar Nurseries 2/26/32/343, 5.0 km away, in November 2023. These are river and borehole samples, not tests of your tap water.

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

HU7 in short

Tap water in HU7 (Kingston upon Hull, City of) is supplied by Yorkshire Water in the Kingston upon Hull, City of Central zone and scores 9.0 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 24 September 2026.

  • Nitrite is within its legal limit but flagged, at 100% of the 0.5 mg/L maximumAnything over three quarters of a limit is flagged here as worth watching. It has not gone over. See every reading
  • The cleanest tap water of the 9 areas tested in HullHU7 scores 9 out of 10, ahead of HU1 in second place on 8.9. Every area in Hull
  • Very hard water at 271 mg/LThe threshold for very hard is 250 mg/L. Expect visible limescale on taps and in kettles in HU7. How hardness is measured

Next door

HU18.9 out of 10 · 355 mg/LHU28.9 out of 10 · 355 mg/LHU38.5 out of 10 · 365 mg/LHU58.8 out of 10 · 367 mg/LHU98.6 out of 10 · 290 mg/LHU68.8 out of 10 · 329 mg/LHU48.9 out of 10 · 360 mg/LHU88.8 out of 10 · 285 mg/L

Questions about HU7 water

Is HU7 tap water safe to drink?

Based on the latest tests, HU7 (Kingston upon Hull, City of) water scores 9/10, which is safe. 1 of 25 tested contaminants exceeded recommended levels. Water is supplied by Yorkshire Water.

What contaminants are in HU7 water?

We tested 25 contaminants in HU7 water. 1 were flagged, including Nitrite. 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 HU7?

HU7 (Kingston upon Hull, City of) is supplied by Yorkshire Water. You can view their full profile and compliance data on our supplier page.

Is HU7 water hard or soft?

Water in HU7 (Kingston upon Hull, City of) has a hardness of 271 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 HU7?

With 1 contaminant above recommended levels in HU7, a water filter could help. A reverse osmosis or activated carbon filter is recommended for PFAS removal. See our filter recommendations for your area.

Are there PFAS forever chemicals in HU7 water?

The tap-water tests we hold for HU7 do not include a PFAS result. Environment Agency monitoring found PFAS in 61 river and groundwater samples from 3 sites within 10 km of HU7, the highest being 6:2 FTSA at 0.053 µg/L about 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 HU7?

The Environment Agency rated the Holderness Drain from Foredyke Stream to Humber as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by fish, insects and other small river life 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 HU7, which is treated before it reaches homes.

Keep reading

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

River and groundwater readings near HU7

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
Iron1.07 mg/L0.2 mg/L
pH7.79 pHNone
Temperature15.5 °CNone
Conductivity1001 µS/cmNone
Ammonia0.063 mg/L0.5 mg/L
Nitrate2.5 mg/L50 mg/L
Nitrite0.018 mg/L0.5 mg/L
Phosphate0.011 mg/LNone
Dissolved Oxygen10.8 mg/LNone
PFAS (total)0.00141 µg/LNone

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We'll email you when water quality data changes for HU7.

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