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tapwater
England and Wales average 9.0

Tap water in DE6, Derbyshire DalesSafe to drink.

Supplied by Severn Trent. 1,138 samples, 20 substances, latest on 24 December 2025. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.4 / 10

The tank is as full as the score.

What to do about it

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Households concerned about PFAS and heavy metals

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High-volume under-sink filtration without RO complexity

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Basic chlorine and taste improvement on a budget

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What's in a glass of DE6 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 31% of it. 16 of 17 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitNitrite: 0.003 mg/L, <1% of the 0.5 mg/L limitNitrite<1%Chromium: 0.00042 mg/L, <1% of the 0.05 mg/L limitChromium<1%Antimony: 0.00006 mg/L, 1% of the 0.005 mg/L limitAntimony1%Selenium: 0.00049 mg/L, 1% of the 0.04 mg/L limitSelenium1%Arsenic: 0.00014 mg/L, 1% of the 0.01 mg/L limitArsenic1%Lead: 0.00015 mg/L, 1% of the 0.01 mg/L limitLead1%Copper: 0.0382 mg/L, 2% of the 2 mg/L limitCopper2%Manganese: 0.00115 mg/L, 2% of the 0.05 mg/L limitManganese2%Turbidity: 0.12 NTU, 3% of the 4 NTU limitTurbidity3%Colour: 0.8 mg/L Pt/Co, 4% of the 20 mg/L Pt/Co limitColour4%Iron: 0.0087 mg/L, 4% of the 0.2 mg/L limitIron4%Cadmium: 0.00033 mg/L, 7% of the 0.005 mg/L limitCadmium7%Fluoride: 0.1 mg/L, 7% of the 1.5 mg/L limitFluoride7%Aluminium: 0.021 mg/L, 11% of the 0.2 mg/L limitAluminium11%Nitrate: 6.4 mg/L, 13% of the 50 mg/L limitNitrate13%Nickel: 0.0027 mg/L, 14% of the 0.02 mg/L limitNickel14%Trihalomethanes: 0.0308 mg/L, 31% of the 0.1 mg/L limitTrihalomethanes31%
  1. Trihalomethanes31%
  2. Nickel14%
  3. Nitrate13%
  4. Aluminium11%
  5. Fluoride7%
  6. Cadmium7%
  7. Iron4%
  8. Colour4%
  9. Turbidity3%
  10. Manganese2%
  11. Copper2%
  12. Lead1%
  13. Arsenic1%
  14. Selenium1%
  15. Antimony1%
  16. Chromium<1%
  17. Nitrite<1%
  • Conductivity 218 µS/cm
  • pH 7.77 pH
  • Phosphate 0.776 mg/L
All 20 results as a table
SubstanceResultLegal limitShare of limit
Conductivity218 µS/cmNo legal limit–
Colour0.8 mg/L Pt/Co20 mg/L Pt/Co
4%
pH7.77 pHNo legal limit–
Turbidity0.12 NTU4 NTU
3%
Aluminium0.021 mg/L0.2 mg/L
11%
Iron0.0087 mg/L0.2 mg/L
4%
Manganese0.00115 mg/L0.05 mg/L
2%
Copper0.0382 mg/L2 mg/L
2%
Fluoride0.1 mg/L1.5 mg/L
7%
Arsenic0.00014 mg/L0.01 mg/L
1%
Cadmium0.00033 mg/L0.005 mg/L
7%
Chromium0.00042 mg/L0.05 mg/L
<1%
Nickel0.0027 mg/L0.02 mg/L
14%
Lead0.00015 mg/L0.01 mg/L
1%
Antimony0.00006 mg/L0.005 mg/L
1%
Selenium0.00049 mg/L0.04 mg/L
1%
Nitrate6.4 mg/L50 mg/L
13%
Nitrite0.003 mg/L0.5 mg/L
<1%
Trihalomethanes0.0308 mg/L0.1 mg/L
31%
Phosphate0.776 mg/LNo legal limit–
Outside your tap

Your river is the Hilton Bk (trib of R Dove), rated moderate

The Environment Agency rated the Hilton Bk (trib of R Dove) 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 and phosphate. 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

14

forever-chemical detections in nearby rivers and groundwater

At 3 sites. The highest was PFOS (linear) at 0.0029 µg/L, at RSN1618 Spinnyford Brook, 5.5 km away, in May 2024. These are river and borehole samples, not tests of your tap water.

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

DE6 in short

Tap water in DE6 (Derbyshire Dales) is supplied by Severn Trent in the Derbyshire Dales Central zone and scores 9.4 out of 10, against an England and Wales average of 9.0. None of the 20 tested substances came close to a limit. The latest sample is from 24 December 2025.

  • The lowest score of the 4 areas tested in Derbyshire DalesDE6 scores 9.4 out of 10. The best in Derbyshire Dales, S32, scores 9.6.
  • PFAS found at 3 monitoring sites within 10 kmThose are river and groundwater samples, not tap water. The highest was PFOS (linear) about 5.5 km away. What was measured
  • Nothing tested came within 40% of its legal limitThe highest was Trihalomethanes at 31% of the 0.1 mg/L maximum. See every reading

Next door

DE459.4 out of 10DE49.4 out of 10S329.6 out of 10 · 88 mg/L

Questions about DE6 water

Is DE6 tap water safe to drink?

Based on the latest tests, DE6 (Derbyshire Dales) water scores 9.4/10, which is safe. 0 of 20 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.

What contaminants are in DE6 water?

We tested 20 contaminants in DE6 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 DE6?

DE6 (Derbyshire Dales) is supplied by Severn Trent. You can view their full profile and compliance data on our supplier page.

Should I use a water filter in DE6?

DE6 water scored 9.4/10 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 DE6 water?

The tap-water tests we hold for DE6 do not include a PFAS result. Environment Agency monitoring found PFAS in 14 river and groundwater samples from 3 sites within 10 km of DE6, the highest being PFOS (linear) at 0.0029 µg/L about 5.5 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 DE6?

The Environment Agency rated the Hilton Bk (trib of R Dove) 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 and phosphate. 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 DE6, 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 DE6

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
pH8.4 pHNone
Temperature19 °CNone
Conductivity427 µS/cmNone
Ammonia0.032 mg/L0.5 mg/L
Nitrate1.8 mg/L50 mg/L
Nitrite0.019 mg/L0.5 mg/L
Phosphate0.046 mg/LNone
Dissolved Oxygen9.26 mg/LNone

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Source: Severn Trent 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