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tapwater
England and Wales average 9.0

Tap water in CV5, CoventrySafe to drink.

Supplied by Severn Trent. 1,949 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

8.5 / 10

The tank is as full as the score.

What to do about it

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Basic chlorine and taste improvement on a budget

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What's in a glass of CV5 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.

Fluoride came closest to a limit, at 59% of it. 12 of 17 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitCadmium: 0.00001 mg/L, <1% of the 0.005 mg/L limitCadmium<1%Selenium: 0.00009 mg/L, <1% of the 0.04 mg/L limitSelenium<1%Copper: 0.0084 mg/L, <1% of the 2 mg/L limitCopper<1%Nitrite: 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%Manganese: 0.00073 mg/L, 1% of the 0.05 mg/L limitManganese1%Arsenic: 0.00017 mg/L, 2% of the 0.01 mg/L limitArsenic2%Antimony: 0.000109 mg/L, 2% of the 0.005 mg/L limitAntimony2%Turbidity: 0.12 NTU, 3% of the 4 NTU limitTurbidity3%Iron: 0.007 mg/L, 3% of the 0.2 mg/L limitIron3%Colour: 0.8 mg/L Pt/Co, 4% of the 20 mg/L Pt/Co limitColour4%Aluminium: 0.021 mg/L, 11% of the 0.2 mg/L limitAluminium11%Nickel: 0.0057 mg/L, 29% of the 0.02 mg/L limitNickel29%Nitrate: 14.4 mg/L, 29% of the 50 mg/L limitNitrate29%Trihalomethanes: 0.0299 mg/L, 30% of the 0.1 mg/L limitTrihalomethanes30%Lead: 0.00488 mg/L, 49% of the 0.01 mg/L limitLead49%Fluoride: 0.89 mg/L, 59% of the 1.5 mg/L limitFluoride59%
  1. Fluoride59%
  2. Lead49%
  3. Trihalomethanes30%
  4. Nitrate29%
  5. Nickel29%
  6. Aluminium11%
  7. Colour4%
  8. Iron3%
  9. Turbidity3%
  10. Antimony2%
  11. Arsenic2%
  12. Manganese1%
  13. Chromium<1%
  14. Nitrite<1%
  15. Copper<1%
  16. Selenium<1%
  17. Cadmium<1%
  • pH 7.19 pH
  • Conductivity 361 µS/cm
  • Phosphate 1.05 mg/L
All 20 results as a table
SubstanceResultLegal limitShare of limit
Chromium0.00042 mg/L0.05 mg/L
<1%
Nickel0.0057 mg/L0.02 mg/L
29%
Colour0.8 mg/L Pt/Co20 mg/L Pt/Co
4%
Turbidity0.12 NTU4 NTU
3%
pH7.19 pHNo legal limit–
Nitrate14.4 mg/L50 mg/L
29%
Nitrite0.003 mg/L0.5 mg/L
<1%
Lead0.00488 mg/L0.01 mg/L
49%
Antimony0.000109 mg/L0.005 mg/L
2%
Aluminium0.021 mg/L0.2 mg/L
11%
Selenium0.00009 mg/L0.04 mg/L
<1%
Iron0.007 mg/L0.2 mg/L
3%
Manganese0.00073 mg/L0.05 mg/L
1%
Copper0.0084 mg/L2 mg/L
<1%
Fluoride0.89 mg/L1.5 mg/L
59%
Arsenic0.00017 mg/L0.01 mg/L
2%
Cadmium0.00001 mg/L0.005 mg/L
<1%
Conductivity361 µS/cmNo legal limit–
Trihalomethanes0.0299 mg/L0.1 mg/L
30%
Phosphate1.05 mg/LNo legal limit–
Outside your tap

Your river is the Sherbourne - source to conf R Sowe, rated poor

The Environment Agency rated the Sherbourne - source to conf R Sowe as poor for ecological health in its 2025 assessment, meaning the river is badly affected, with much of the expected wildlife missing. It is held back by fish, insects and other small river life 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

66

forever-chemical detections in nearby rivers and groundwater

At 6 sites. The highest was 6:2 FTSA at 0.043 µg/L, at Brailes Farm Borehole, Fillongley Road, Meriden, 6.2 km away, in March 2024. These are river and borehole samples, not tests of your tap water.

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

CV5 in short

Tap water in CV5 (Coventry) is supplied by Severn Trent in the Coventry Central zone and scores 8.5 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.

  • Fluoride is the reading closest to its limit, at 59% of the 1.5 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
  • 5th cleanest of 7 areas tested in Coventry2 areas in Coventry scored lower. The best is CV7 on 9.3. Every area in Coventry
  • 0.5 points below the national average of 9Below the typical tested district in the UK, which is worth knowing before you choose a filter. Compare every area

Next door

CV48.7 out of 10CV18.5 out of 10CV38.4 out of 10CV79.3 out of 10CV28.5 out of 10CV68.5 out of 10

Questions about CV5 water

Is CV5 tap water safe to drink?

Based on the latest tests, CV5 (Coventry) water scores 8.5/10, which is safe. 0 of 20 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.

What contaminants are in CV5 water?

We tested 20 contaminants in CV5 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 CV5?

CV5 (Coventry) 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 CV5?

CV5 water scored 8.5/10 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 CV5 water?

The tap-water tests we hold for CV5 do not include a PFAS result. Environment Agency monitoring found PFAS in 66 river and groundwater samples from 6 sites within 10 km of CV5, the highest being 6:2 FTSA at 0.043 µg/L about 6.2 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 CV5?

The Environment Agency rated the Sherbourne - source to conf R Sowe as poor for ecological health in its 2025 assessment, meaning the river is badly affected, with much of the expected wildlife missing. It is held back by fish, insects and other small river life 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 CV5, which is treated before it reaches homes.

Keep reading

PFAS explainedHow to test your waterBest water filtersFilter shower headsWater testing kitsAll of CoventryUK water rankingsWater hardness checkerWater hardness map

River and groundwater readings near CV5

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
pH8.1 pHNone
Temperature13.6 °CNone
Conductivity653 µS/cmNone
Ammonia0.037 mg/L0.5 mg/L
Nitrate9.9 mg/L50 mg/L
Nitrite0.039 mg/L0.5 mg/L
Phosphate0.13 mg/LNone
Dissolved Oxygen8.5 mg/LNone
Chromium0.0012 mg/L0.05 mg/L
Copper0.0052 mg/L2 mg/L
Zinc0.023 mg/LNone
Nickel0.0038 mg/L0.02 mg/L
Lead0.0042 mg/L0.01 mg/L

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We'll email you when water quality data changes for CV5.

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