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tapwater
England and Wales average 9.0

Tap water in DE7, ErewashSafe to drink.

Supplied by Severn Trent. 1,624 samples, 20 substances, latest on 22 December 2025. 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.

What to do about it

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Households concerned about PFAS and heavy metals

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Basic chlorine and taste improvement on a budget

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What's in a glass of DE7 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 33% 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%Selenium: 0.00047 mg/L, 1% of the 0.04 mg/L limitSelenium1%Arsenic: 0.00014 mg/L, 1% of the 0.01 mg/L limitArsenic1%Lead: 0.00014 mg/L, 1% of the 0.01 mg/L limitLead1%Manganese: 0.00073 mg/L, 1% of the 0.05 mg/L limitManganese1%Turbidity: 0.12 NTU, 3% of the 4 NTU limitTurbidity3%Cadmium: 0.00016 mg/L, 3% of the 0.005 mg/L limitCadmium3%Antimony: 0.000169 mg/L, 3% of the 0.005 mg/L limitAntimony3%Iron: 0.007 mg/L, 3% of the 0.2 mg/L limitIron3%Copper: 0.0832 mg/L, 4% of the 2 mg/L limitCopper4%Nickel: 0.0021 mg/L, 11% of the 0.02 mg/L limitNickel11%Aluminium: 0.021 mg/L, 11% of the 0.2 mg/L limitAluminium11%Colour: 2.8 mg/L Pt/Co, 14% of the 20 mg/L Pt/Co limitColour14%Fluoride: 0.26 mg/L, 17% of the 1.5 mg/L limitFluoride17%Nitrate: 8.7 mg/L, 17% of the 50 mg/L limitNitrate17%Trihalomethanes: 0.0328 mg/L, 33% of the 0.1 mg/L limitTrihalomethanes33%
  1. Trihalomethanes33%
  2. Nitrate17%
  3. Fluoride17%
  4. Colour14%
  5. Nickel11%
  6. Aluminium11%
  7. Copper4%
  8. Iron3%
  9. Antimony3%
  10. Cadmium3%
  11. Turbidity3%
  12. Manganese1%
  13. Arsenic1%
  14. Lead1%
  15. Selenium1%
  16. Chromium<1%
  17. Nitrite<1%
  • Conductivity 464 µS/cm
  • pH 7.23 pH
  • Phosphate 1.04 mg/L
All 20 results as a table
SubstanceResultLegal limitShare of limit
Conductivity464 µS/cmNo legal limit–
pH7.23 pHNo legal limit–
Colour2.8 mg/L Pt/Co20 mg/L Pt/Co
14%
Turbidity0.12 NTU4 NTU
3%
Aluminium0.021 mg/L0.2 mg/L
11%
Iron0.007 mg/L0.2 mg/L
3%
Manganese0.00073 mg/L0.05 mg/L
1%
Nitrate8.7 mg/L50 mg/L
17%
Nitrite0.003 mg/L0.5 mg/L
<1%
Copper0.0832 mg/L2 mg/L
4%
Fluoride0.26 mg/L1.5 mg/L
17%
Arsenic0.00014 mg/L0.01 mg/L
1%
Cadmium0.00016 mg/L0.005 mg/L
3%
Chromium0.00042 mg/L0.05 mg/L
<1%
Nickel0.0021 mg/L0.02 mg/L
11%
Lead0.00014 mg/L0.01 mg/L
1%
Antimony0.000169 mg/L0.005 mg/L
3%
Selenium0.00047 mg/L0.04 mg/L
1%
Trihalomethanes0.0328 mg/L0.1 mg/L
33%
Phosphate1.04 mg/LNo legal limit–
Outside your tap

Your river is the Nut Brook Catchment (trib of Erewash), rated bad

The Environment Agency rated the Nut Brook Catchment (trib of Erewash) as bad for ecological health in its 2025 assessment, meaning the river is severely damaged, with most of the expected wildlife missing. It is held back by fish and water plants and algae. 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

154

forever-chemical detections in nearby rivers and groundwater

At 13 sites. The highest was 6:2 FTSA at 0.061 µg/L, at Spring at Breadsall Manor Groundwater Quality Monitoring D22/15A, 8.8 km away, in March 2026. These are river and borehole samples, not tests of your tap water.

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

DE7 in short

Tap water in DE7 (Erewash) is supplied by Severn Trent in the Erewash Central zone and scores 9.3 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 22 December 2025.

  • The cleanest tap water of the 3 areas tested in ErewashDE7 scores 9.3 out of 10, ahead of DE72 in second place on 9.3.
  • PFAS found at 13 monitoring sites within 10 kmThose are river and groundwater samples, not tap water. The highest was 6:2 FTSA about 8.8 km away. What was measured
  • Nothing tested came within 40% of its legal limitThe highest was Trihalomethanes at 33% of the 0.1 mg/L maximum. See every reading

Next door

DE729.3 out of 10NG109.0 out of 10 · 341 mg/LDE759.2 out of 10

Questions about DE7 water

Is DE7 tap water safe to drink?

Based on the latest tests, DE7 (Erewash) water scores 9.3/10, which is safe. 0 of 20 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.

What contaminants are in DE7 water?

We tested 20 contaminants in DE7 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 DE7?

DE7 (Erewash) 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 DE7?

DE7 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 DE7 water?

The tap-water tests we hold for DE7 do not include a PFAS result. Environment Agency monitoring found PFAS in 154 river and groundwater samples from 13 sites within 10 km of DE7, the highest being 6:2 FTSA at 0.061 µg/L about 8.8 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 DE7?

The Environment Agency rated the Nut Brook Catchment (trib of Erewash) as bad for ecological health in its 2025 assessment, meaning the river is severely damaged, with most of the expected wildlife missing. It is held back by fish and water plants and algae. 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 DE7, 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 DE7

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
Ammonia0.55 mg/L0.5 mg/L
pH8.13 pHNone
Temperature16.9 °CNone
Nitrate13 mg/L50 mg/L
Nitrite0.025 mg/L0.5 mg/L
Phosphate0.058 mg/LNone
Dissolved Oxygen9.44 mg/LNone
Conductivity486 µS/cmNone
Iron0.073 mg/L0.2 mg/L

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We'll email you when water quality data changes for DE7.

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