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tapwater
England and Wales average 9.0

Tap water in CV23, RugbySafe to drink.

Supplied by Severn Trent. 916 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

9.1 / 10

The tank is as full as the score.

What to do about it

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What's in a glass of CV23 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 47% of it. 15 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%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: 0.00014 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%Copper: 0.0323 mg/L, 2% of the 2 mg/L limitCopper2%Antimony: 0.000097 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%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%Nitrate: 11.8 mg/L, 24% of the 50 mg/L limitNitrate24%Trihalomethanes: 0.0326 mg/L, 33% of the 0.1 mg/L limitTrihalomethanes33%Fluoride: 0.71 mg/L, 47% of the 1.5 mg/L limitFluoride47%
  1. Fluoride47%
  2. Trihalomethanes33%
  3. Nitrate24%
  4. Nickel11%
  5. Aluminium11%
  6. Colour4%
  7. Iron3%
  8. Turbidity3%
  9. Antimony2%
  10. Copper2%
  11. Manganese1%
  12. Arsenic1%
  13. Lead1%
  14. Chromium<1%
  15. Nitrite<1%
  16. Selenium<1%
  17. Cadmium<1%
  • pH 7.37 pH
  • Conductivity 577 µS/cm
  • Phosphate 1.05 mg/L
All 20 results as a table
SubstanceResultLegal limitShare of limit
Colour0.8 mg/L Pt/Co20 mg/L Pt/Co
4%
Turbidity0.12 NTU4 NTU
3%
pH7.37 pHNo legal limit–
Manganese0.00073 mg/L0.05 mg/L
1%
Aluminium0.021 mg/L0.2 mg/L
11%
Iron0.007 mg/L0.2 mg/L
3%
Nitrite0.003 mg/L0.5 mg/L
<1%
Conductivity577 µS/cmNo legal limit–
Nitrate11.8 mg/L50 mg/L
24%
Copper0.0323 mg/L2 mg/L
2%
Fluoride0.71 mg/L1.5 mg/L
47%
Arsenic0.00014 mg/L0.01 mg/L
1%
Cadmium0.00001 mg/L0.005 mg/L
<1%
Chromium0.00042 mg/L0.05 mg/L
<1%
Nickel0.0021 mg/L0.02 mg/L
11%
Lead0.00014 mg/L0.01 mg/L
1%
Antimony0.000097 mg/L0.005 mg/L
2%
Selenium0.00009 mg/L0.04 mg/L
<1%
Trihalomethanes0.0326 mg/L0.1 mg/L
33%
Phosphate1.05 mg/LNo legal limit–
Outside your tap

Your river is the Sow Bk - source to conf R Avon, rated moderate

The Environment Agency rated the Sow Bk - source to conf R Avon as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by organic pollution (bod) 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

22

forever-chemical detections in nearby rivers and groundwater

At 1 site. The highest was PFBA at 0.0044 µg/L, at Draycote Stream D/S Draycote Reservoir, 6.7 km away, in June 2023. These are river and borehole samples, not tests of your tap water.

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

CV23 in short

Tap water in CV23 (Rugby) is supplied by Severn Trent in the Rugby Central zone and scores 9.1 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 RugbyCV23 scores 9.1 out of 10, ahead of CV21 in second place on 9.
  • Fluoride is the reading closest to its limit, at 47% of the 1.5 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
  • PFAS found at 1 monitoring site within 10 kmThose are river and groundwater samples, not tap water. The highest was PFBA about 6.7 km away. What was measured

Next door

CV228.9 out of 10CV219.0 out of 10

Questions about CV23 water

Is CV23 tap water safe to drink?

Based on the latest tests, CV23 (Rugby) water scores 9.1/10, which is safe. 0 of 20 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.

What contaminants are in CV23 water?

We tested 20 contaminants in CV23 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 CV23?

CV23 (Rugby) 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 CV23?

CV23 water scored 9.1/10 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 CV23 water?

The tap-water tests we hold for CV23 do not include a PFAS result. Environment Agency monitoring found PFAS in 22 river and groundwater samples from 1 sites within 10 km of CV23, the highest being PFBA at 0.0044 µg/L about 6.7 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 CV23?

The Environment Agency rated the Sow Bk - source to conf R Avon as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by organic pollution (bod) 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 CV23, 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 CV23

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
Turbidity11 NTU4 NTU
pH8.03 pHNone
Temperature8.7 °CNone
Conductivity573 µS/cmNone
Nitrate4.4 mg/L50 mg/L
Nitrite0.022 mg/L0.5 mg/L
Phosphate0.091 mg/LNone
Dissolved Oxygen10.8 mg/LNone
Ammonia0.083 mg/L0.5 mg/L

Get alerts for your area

We'll email you when water quality data changes for CV23.

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