Skip to main content
tapwater
England and Wales average 9.0

Tap water in OL14, CalderdaleSafe to drink.Soft.

Supplied by Yorkshire Water. 710 samples, 25 substances, latest on 3 November 2026. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.3 / 10

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

What to do about it

ZeroWater 12-Cup Ready-Pour

ZeroWater 12-Cup Ready-Pour

£40typical price

Households concerned about PFAS and heavy metals

Check price at Amazon (opens in new tab)
Waterdrop 10UA Under Sink

Waterdrop 10UA Under Sink

£70typical price

High-volume under-sink filtration without RO complexity

Check price at Waterdrop (opens in new tab)
BRITA Marella XL + MAXTRA PRO

BRITA Marella XL + MAXTRA PRO

£25typical price

Basic chlorine and taste improvement on a budget

Check price at Amazon (opens in new tab)

We earn a commission if you buy through these links, at no extra cost to you. It never changes which product we put first. How we make money

What's in a glass of OL14 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 40% of it. 18 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%Boron: 0.0084 mg/L, <1% of the 1 mg/L limitBoron<1%Selenium: 0.00043 mg/L, 1% of the 0.04 mg/L limitSelenium1%Arsenic: 0.00014 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%Cadmium: 0.00009 mg/L, 2% of the 0.005 mg/L limitCadmium2%Manganese: 0.00101 mg/L, 2% of the 0.05 mg/L limitManganese2%Fluoride: 0.04 mg/L, 3% of the 1.5 mg/L limitFluoride3%Copper: 0.0644 mg/L, 3% of the 2 mg/L limitCopper3%Mercury: 0.00004 mg/L, 4% of the 0.001 mg/L limitMercury4%Turbidity: 0.19 NTU, 5% of the 4 NTU limitTurbidity5%Nickel: 0.00096 mg/L, 5% of the 0.02 mg/L limitNickel5%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%Bromate: 0.0012 mg/L, 12% of the 0.01 mg/L limitBromate12%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Iron: 0.032 mg/L, 16% of the 0.2 mg/L limitIron16%Lead: 0.00339 mg/L, 34% of the 0.01 mg/L limitLead34%Trihalomethanes: 0.0397 mg/L, 40% of the 0.1 mg/L limitTrihalomethanes40%
  1. Trihalomethanes40%
  2. Lead34%
  3. Iron16%
  4. Colour15%
  5. Bromate12%
  6. Nitrate7%
  7. Aluminium6%
  8. Nickel5%
  9. Turbidity5%
  10. Mercury4%
  11. Copper3%
  12. Fluoride3%
  13. Manganese2%
  14. Cadmium2%
  15. Antimony2%
  16. Nitrite2%
  17. Arsenic1%
  18. Selenium1%
  19. Boron<1%
  20. Chromium<1%
  • E. coli none found
  • Coliform Bacteria none found
  • Conductivity 122 µS/cm
  • Phosphate 1.39 mg/L
All 25 results as a table
SubstanceResultLegal limitShare of limit
Mercury0.00004 mg/L0.001 mg/L
4%
E. coli0 count/100mlMust be zeroNone found
Turbidity0.19 NTU4 NTU
5%
Antimony0.000081 mg/L0.005 mg/L
2%
Trihalomethanes0.0397 mg/L0.1 mg/L
40%
Bromate0.0012 mg/L0.01 mg/L
12%
Nitrite0.008 mg/L0.5 mg/L
2%
Nitrate3.73 mg/L50 mg/L
7%
Copper0.0644 mg/L2 mg/L
3%
Selenium0.00043 mg/L0.04 mg/L
1%
Arsenic0.00014 mg/L0.01 mg/L
1%
Coliform Bacteria0 count/100mlMust be zeroNone found
Nickel0.00096 mg/L0.02 mg/L
5%
Chromium0.00019 mg/L0.05 mg/L
<1%
Cadmium0.00009 mg/L0.005 mg/L
2%
Fluoride0.04 mg/L1.5 mg/L
3%
Boron0.0084 mg/L1 mg/L
<1%
Conductivity122 µS/cmNo legal limit–
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Lead0.00339 mg/L0.01 mg/L
34%
Aluminium0.0111 mg/L0.2 mg/L
6%
Iron0.032 mg/L0.2 mg/L
16%
Manganese0.00101 mg/L0.05 mg/L
2%
Phosphate1.39 mg/LNo legal limit–
Hardness (as CaCO3)40.5 mg/LNo legal limit–

38mg 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 Walsden Water from Source to River Calder, rated moderate

The Environment Agency rated the Walsden Water 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

OL14 in short

Tap water in OL14 (Calderdale) is supplied by Yorkshire Water in the Calderdale Central zone and scores 9.3 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 3 November 2026.

  • The lowest score of the 9 areas tested in CalderdaleOL14 scores 9.3 out of 10. The best in Calderdale, HD6, scores 9.6.
  • Trihalomethanes is the reading closest to its limit, at 40% 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 38 mg/LLimescale is not a problem in OL14, so skip softeners and scale filters entirely. How hardness is measured

Next door

HX69.6 out of 10 · 33 mg/LHX79.6 out of 10 · 36 mg/LHX29.6 out of 10 · 58 mg/LHX39.3 out of 10 · 66 mg/LHD69.6 out of 10 · 43 mg/LHX19.6 out of 10 · 50 mg/LHX49.5 out of 10 · 34 mg/LHX59.6 out of 10 · 66 mg/L

Questions about OL14 water

Is OL14 tap water safe to drink?

Based on the latest tests, OL14 (Calderdale) water scores 9.3/10, which is safe. 0 of 25 tested contaminants exceeded recommended levels. Water is supplied by Yorkshire Water.

What contaminants are in OL14 water?

We tested 25 contaminants in OL14 water. None exceeded recommended safe levels.

Who supplies water in OL14?

OL14 (Calderdale) is supplied by Yorkshire Water. You can view their full profile and compliance data on our supplier page.

Is OL14 water hard or soft?

Water in OL14 (Calderdale) has a hardness of 38 mg/L CaCO3, which is classified as soft. Soft water is gentle on appliances and skin.

Should I use a water filter in OL14?

OL14 water scored 9.3/10 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 OL14 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for OL14, 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 OL14?

The Environment Agency rated the Walsden Water 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 OL14, 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 OL14

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
Iron0.73 mg/L0.2 mg/L
Lead0.112 mg/L0.01 mg/L
Chromium0.0854 mg/L0.05 mg/L
Nickel0.0249 mg/L0.02 mg/L
pH7.83 pHNone
Temperature12.6 °CNone
Conductivity224 µS/cmNone
Ammonia0.032 mg/L0.5 mg/L
Nitrate0.53 mg/L50 mg/L
Dissolved Oxygen10.6 mg/LNone
Copper0.0018 mg/L2 mg/L
Zinc0.0126 mg/LNone
Cadmium0.00198 mg/L0.005 mg/L
Aluminium0.063 mg/L0.2 mg/L

Get alerts for your area

We'll email you when water quality data changes for OL14.

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