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tapwater
England and Wales average 9.0

Tap water in HX4, CalderdaleSafe to drink.Soft.

Supplied by Yorkshire Water. 906 samples, 25 substances, latest on 24 September 2026. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.5 / 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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What's in a glass of HX4 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.

Trihalomethanes came closest to a limit, at 43% 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%Copper: 0.00953 mg/L, <1% of the 2 mg/L limitCopper<1%Cadmium: 0.000031 mg/L, <1% of the 0.005 mg/L limitCadmium<1%Boron: 0.0087 mg/L, <1% of the 1 mg/L limitBoron<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%Arsenic: 0.00015 mg/L, 1% of the 0.01 mg/L limitArsenic1%Nitrite: 0.008 mg/L, 2% of the 0.5 mg/L limitNitrite2%Antimony: 0.000081 mg/L, 2% of the 0.005 mg/L limitAntimony2%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%Iron: 0.00928 mg/L, 5% of the 0.2 mg/L limitIron5%Fluoride: 0.07 mg/L, 5% of the 1.5 mg/L limitFluoride5%Turbidity: 0.2 NTU, 5% of the 4 NTU limitTurbidity5%Aluminium: 0.0113 mg/L, 6% of the 0.2 mg/L limitAluminium6%Nickel: 0.00145 mg/L, 7% of the 0.02 mg/L limitNickel7%Nitrate: 3.73 mg/L, 7% of the 50 mg/L limitNitrate7%Bromate: 0.0009 mg/L, 9% of the 0.01 mg/L limitBromate9%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Trihalomethanes: 0.0434 mg/L, 43% of the 0.1 mg/L limitTrihalomethanes43%
  1. Trihalomethanes43%
  2. Colour15%
  3. Bromate9%
  4. Nitrate7%
  5. Nickel7%
  6. Aluminium6%
  7. Turbidity5%
  8. Fluoride5%
  9. Iron5%
  10. Mercury4%
  11. Manganese4%
  12. Antimony2%
  13. Nitrite2%
  14. Arsenic1%
  15. Selenium1%
  16. Lead<1%
  17. Boron<1%
  18. Cadmium<1%
  19. Copper<1%
  20. Chromium<1%
  • E. coli none found
  • Coliform Bacteria none found
  • Conductivity 142 µS/cm
  • Phosphate 1.04 mg/L
All 25 results as a table
SubstanceResultLegal limitShare of limit
E. coli0 count/100mlMust be zeroNone found
Coliform Bacteria0 count/100mlMust be zeroNone found
Turbidity0.2 NTU4 NTU
5%
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Conductivity142 µS/cmNo legal limit–
Aluminium0.0113 mg/L0.2 mg/L
6%
Iron0.00928 mg/L0.2 mg/L
5%
Manganese0.00178 mg/L0.05 mg/L
4%
Phosphate1.04 mg/LNo legal limit–
Bromate0.0009 mg/L0.01 mg/L
9%
Lead0.00009 mg/L0.01 mg/L
<1%
Nitrite0.008 mg/L0.5 mg/L
2%
Nitrate3.73 mg/L50 mg/L
7%
Selenium0.00043 mg/L0.04 mg/L
1%
Arsenic0.00015 mg/L0.01 mg/L
1%
Antimony0.000081 mg/L0.005 mg/L
2%
Copper0.00953 mg/L2 mg/L
<1%
Fluoride0.07 mg/L1.5 mg/L
5%
Nickel0.00145 mg/L0.02 mg/L
7%
Trihalomethanes0.0434 mg/L0.1 mg/L
43%
Chromium0.00019 mg/L0.05 mg/L
<1%
Cadmium0.000031 mg/L0.005 mg/L
<1%
Boron0.0087 mg/L1 mg/L
<1%
Mercury0.00004 mg/L0.001 mg/L
4%
Hardness (as CaCO3)39.7 mg/LNo legal limit–

32mg 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 Black Brook from Source to River Calder, rated moderate

The Environment Agency rated the Black Brook from Source to River Calder 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. 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

74

forever-chemical detections in nearby rivers and groundwater

At 4 sites. The highest was PFPeA at 0.24 µg/L, at Bradford Rd, Bailiff Bridge 2/27/12/098, 8.3 km away, in June 2025. These are river and borehole samples, not tests of your tap water.

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

HX4 in short

Tap water in HX4 (Calderdale) is supplied by Yorkshire Water in the Calderdale Central zone and scores 9.5 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 24 September 2026.

  • Trihalomethanes is the reading closest to its limit, at 43% of the 0.1 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
  • Soft water at 32 mg/LLimescale is not a problem in HX4, so skip softeners and scale filters entirely. How hardness is measured
  • 5th cleanest of 9 areas tested in CalderdaleSquarely mid-table for Calderdale, between HX6 on 9.6 and HX3 on 9.3.

Next door

HX69.6 out of 10 · 33 mg/LHX79.6 out of 10 · 36 mg/LHX29.3 out of 10 · 61 mg/LHX39.3 out of 10 · 66 mg/LHD69.5 out of 10 · 40 mg/LHX19.3 out of 10 · 51 mg/LHX59.5 out of 10 · 42 mg/LOL149.6 out of 10 · 37 mg/L

Questions about HX4 water

Is HX4 tap water safe to drink?

Based on the latest tests, HX4 (Calderdale) water scores 9.5/10, which is safe. 0 of 25 tested contaminants exceeded recommended levels. Water is supplied by Yorkshire Water.

What contaminants are in HX4 water?

We tested 25 contaminants in HX4 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 HX4?

HX4 (Calderdale) is supplied by Yorkshire Water. You can view their full profile and compliance data on our supplier page.

Is HX4 water hard or soft?

Water in HX4 (Calderdale) has a hardness of 32 mg/L CaCO3, which is classified as soft. Soft water is gentle on appliances and skin.

Should I use a water filter in HX4?

HX4 water scored 9.5/10 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 HX4 water?

The tap-water tests we hold for HX4 do not include a PFAS result. Environment Agency monitoring found PFAS in 74 river and groundwater samples from 4 sites within 10 km of HX4, the highest being PFPeA at 0.24 µg/L about 8.3 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 HX4?

The Environment Agency rated the Black Brook from Source to River Calder 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. 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 HX4, which is treated before it reaches homes.

Keep reading

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

River and groundwater readings near HX4

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
pH8.12 pHNone
Temperature11.3 °CNone
Conductivity211 µS/cmNone
Nitrate0.5 mg/L50 mg/L
Dissolved Oxygen11.2 mg/LNone
Phosphate0.011 mg/LNone
Nitrite0.0067 mg/L0.5 mg/L
Ammonia0.32 mg/L0.5 mg/L

Get alerts for your area

We'll email you when water quality data changes for HX4.

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