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tapwater
England and Wales average 9.0

Tap water in CV3, CoventrySafe to drink.

Supplied by Severn Trent. 1,576 samples, 20 substances, latest on 19 December 2025. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

8.4 / 10

The tank is as full as the score.

What to do about it

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What's in a glass of CV3 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%Arsenic: 0.00017 mg/L, 2% of the 0.01 mg/L limitArsenic2%Manganese: 0.0009 mg/L, 2% of the 0.05 mg/L limitManganese2%Antimony: 0.000109 mg/L, 2% of the 0.005 mg/L limitAntimony2%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%Aluminium: 0.021 mg/L, 11% of the 0.2 mg/L limitAluminium11%Iron: 0.0307 mg/L, 15% of the 0.2 mg/L limitIron15%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. Iron15%
  7. Aluminium11%
  8. Colour4%
  9. Turbidity3%
  10. Antimony2%
  11. Manganese2%
  12. Arsenic2%
  13. Chromium<1%
  14. Nitrite<1%
  15. Copper<1%
  16. Selenium<1%
  17. Cadmium<1%
  • pH 7.26 pH
  • Conductivity 197 µS/cm
  • Phosphate 0.91 mg/L
All 20 results as a table
SubstanceResultLegal limitShare of limit
pH7.26 pHNo legal limit–
Iron0.0307 mg/L0.2 mg/L
15%
Manganese0.0009 mg/L0.05 mg/L
2%
Aluminium0.021 mg/L0.2 mg/L
11%
Colour0.8 mg/L Pt/Co20 mg/L Pt/Co
4%
Turbidity0.12 NTU4 NTU
3%
Conductivity197 µS/cmNo legal limit–
Nitrate14.4 mg/L50 mg/L
29%
Nitrite0.003 mg/L0.5 mg/L
<1%
Trihalomethanes0.0299 mg/L0.1 mg/L
30%
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%
Chromium0.00042 mg/L0.05 mg/L
<1%
Nickel0.0057 mg/L0.02 mg/L
29%
Lead0.00488 mg/L0.01 mg/L
49%
Antimony0.000109 mg/L0.005 mg/L
2%
Selenium0.00009 mg/L0.04 mg/L
<1%
Phosphate0.91 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

122

forever-chemical detections in nearby rivers and groundwater

At 6 sites. The highest was 6:2 FTSA at 0.015 µg/L, at Kenilworth Golf Club Borehole T34/8, 6.8 km away, in June 2025. These are river and borehole samples, not tests of your tap water.

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

CV3 in short

Tap water in CV3 (Coventry) is supplied by Severn Trent in the Coventry Central zone and scores 8.4 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 19 December 2025.

  • The lowest score of the 7 areas tested in CoventryCV3 scores 8.4 out of 10. The best in Coventry, CV7, scores 9.3. Every area in Coventry
  • Every one of the 6 neighbouring districts scores higherCV7 next door scores 9.3, against 8.4 here. Supply zones, not distance, explain the gap. See CV7
  • 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

Next door

CV48.7 out of 10CV18.5 out of 10CV58.5 out of 10CV79.3 out of 10CV28.5 out of 10CV68.5 out of 10

Questions about CV3 water

Is CV3 tap water safe to drink?

Based on the latest tests, CV3 (Coventry) water scores 8.4/10, which is safe. 0 of 20 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.

What contaminants are in CV3 water?

We tested 20 contaminants in CV3 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 CV3?

CV3 (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 CV3?

CV3 water scored 8.4/10 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 CV3 water?

The tap-water tests we hold for CV3 do not include a PFAS result. Environment Agency monitoring found PFAS in 122 river and groundwater samples from 6 sites within 10 km of CV3, the highest being 6:2 FTSA at 0.015 µg/L about 6.8 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 CV3?

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 CV3, 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 CV3

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
pH7.96 pHNone
Iron0.034 mg/L0.2 mg/L
Temperature10.7 °CNone
Conductivity919 µS/cmNone
Ammonia0.038 mg/L0.5 mg/L
Nitrate3.5 mg/L50 mg/L
Nitrite0.011 mg/L0.5 mg/L
Phosphate0.22 mg/LNone
Dissolved Oxygen10.3 mg/LNone

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We'll email you when water quality data changes for CV3.

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