Skip to main content
tapwater
England and Wales average 9.0

Tap water in B46, North WarwickshireSafe to drink.

Supplied by Severn Trent. 572 samples, 20 substances, latest on 29 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

ZeroWater 12-Cup Ready-Pour

ZeroWater 12-Cup Ready-Pour

£40typical price

Households concerned about PFAS and heavy metals

Check price at Amazon (opens in new tab)
Waterdrop 10UA Under Sink

Waterdrop 10UA Under Sink

£70typical price

High-volume under-sink filtration without RO complexity

Check price at Waterdrop (opens in new tab)
BRITA Marella XL + MAXTRA PRO

BRITA Marella XL + MAXTRA PRO

£25typical price

Basic chlorine and taste improvement on a budget

Check price at Amazon (opens in new tab)

We earn a commission if you buy through these links, at no extra cost to you. It never changes which product we put first. How we make money

What's in a glass of B46 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 45% 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%Copper: 0.0126 mg/L, <1% of the 2 mg/L limitCopper<1%Chromium: 0.00042 mg/L, <1% of the 0.05 mg/L limitChromium<1%Antimony: 0.000059 mg/L, 1% of the 0.005 mg/L limitAntimony1%Lead: 0.00014 mg/L, 1% of the 0.01 mg/L limitLead1%Arsenic: 0.00014 mg/L, 1% of the 0.01 mg/L limitArsenic1%Manganese: 0.00073 mg/L, 1% of the 0.05 mg/L limitManganese1%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: 0.001 mg/L, 5% of the 0.02 mg/L limitNickel5%Aluminium: 0.021 mg/L, 11% of the 0.2 mg/L limitAluminium11%Nitrate: 5.8 mg/L, 12% of the 50 mg/L limitNitrate12%Trihalomethanes: 0.0265 mg/L, 26% of the 0.1 mg/L limitTrihalomethanes26%Fluoride: 0.67 mg/L, 45% of the 1.5 mg/L limitFluoride45%
  1. Fluoride45%
  2. Trihalomethanes26%
  3. Nitrate12%
  4. Aluminium11%
  5. Nickel5%
  6. Colour4%
  7. Iron3%
  8. Turbidity3%
  9. Manganese1%
  10. Lead1%
  11. Arsenic1%
  12. Antimony1%
  13. Chromium<1%
  14. Copper<1%
  15. Nitrite<1%
  16. Selenium<1%
  17. Cadmium<1%
  • pH 8.02 pH
  • Conductivity 129 µS/cm
  • Phosphate 0.572 mg/L
All 20 results as a table
SubstanceResultLegal limitShare of limit
Turbidity0.12 NTU4 NTU
3%
Manganese0.00073 mg/L0.05 mg/L
1%
Aluminium0.021 mg/L0.2 mg/L
11%
Iron0.007 mg/L0.2 mg/L
3%
pH8.02 pHNo legal limit–
Colour0.8 mg/L Pt/Co20 mg/L Pt/Co
4%
Conductivity129 µS/cmNo legal limit–
Nitrite0.003 mg/L0.5 mg/L
<1%
Chromium0.00042 mg/L0.05 mg/L
<1%
Nickel0.001 mg/L0.02 mg/L
5%
Nitrate5.8 mg/L50 mg/L
12%
Lead0.00014 mg/L0.01 mg/L
1%
Antimony0.000059 mg/L0.005 mg/L
1%
Selenium0.00009 mg/L0.04 mg/L
<1%
Copper0.0126 mg/L2 mg/L
<1%
Fluoride0.67 mg/L1.5 mg/L
45%
Arsenic0.00014 mg/L0.01 mg/L
1%
Cadmium0.00001 mg/L0.005 mg/L
<1%
Trihalomethanes0.0265 mg/L0.1 mg/L
26%
Phosphate0.572 mg/LNo legal limit–
Outside your tap

Your river is the Blythe from Patrick Bridge to R Tame, rated poor

The Environment Agency rated the Blythe from Patrick Bridge to R Tame 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 water plants and algae 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

167

forever-chemical detections in nearby rivers and groundwater

At 9 sites. The highest was 6:2 FTSA at 0.043 µg/L, at Brailes Farm Borehole, Fillongley Road, Meriden, 8.6 km away, in March 2024. These are river and borehole samples, not tests of your tap water.

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

B46 in short

Tap water in B46 (North Warwickshire) is supplied by Severn Trent in the North Warwickshire 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 29 December 2025.

  • Fluoride is the reading closest to its limit, at 45% 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 9 monitoring sites within 10 kmThose are river and groundwater samples, not tap water. The highest was 6:2 FTSA about 8.6 km away. What was measured
  • Right on the national average of 9 out of 10Most of the country's tested districts land within half a point of B46. Compare every area

Next door

CV98.6 out of 10B379.3 out of 10

Questions about B46 water

Is B46 tap water safe to drink?

Based on the latest tests, B46 (North Warwickshire) 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 B46 water?

We tested 20 contaminants in B46 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 B46?

B46 (North Warwickshire) 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 B46?

B46 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 B46 water?

The tap-water tests we hold for B46 do not include a PFAS result. Environment Agency monitoring found PFAS in 167 river and groundwater samples from 9 sites within 10 km of B46, the highest being 6:2 FTSA at 0.043 µg/L about 8.6 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 B46?

The Environment Agency rated the Blythe from Patrick Bridge to R Tame 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 water plants and algae 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 B46, 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 B46

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
pH7.42 pHNone
Temperature16.4 °CNone
Conductivity790 µS/cmNone
Ammonia0.031 mg/L0.5 mg/L
Nitrate15 mg/L50 mg/L
Nitrite0.04 mg/L0.5 mg/L
Phosphate0.39 mg/LNone
Dissolved Oxygen7.6 mg/LNone
Cadmium0.000014 mg/L0.005 mg/L
Nickel0.011 mg/L0.02 mg/L
Iron0.051 mg/L0.2 mg/L
Hardness (as CaCO3)268 mg/LNone
Zinc0.04 mg/LNone
Chromium0.00273 mg/L0.05 mg/L
Copper0.0052 mg/L2 mg/L

Get alerts for your area

We'll email you when water quality data changes for B46.

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