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England and Wales average 9.0

Tap water in B94, Stratford-on-AvonSafe to drink.

Supplied by Severn Trent. 567 samples, 20 substances, latest on 23 December 2025. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.2 / 10

The tank is as full as the score.

What to do about it

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What's in a glass of B94 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 51% of it. 15 of 17 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitSelenium: 0.00007 mg/L, <1% of the 0.04 mg/L limitSelenium<1%Cadmium: 0.00002 mg/L, <1% of the 0.005 mg/L limitCadmium<1%Nitrite: 0.003 mg/L, <1% of the 0.5 mg/L limitNitrite<1%Copper: 0.0162 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: 0.0008 mg/L, 2% of the 0.05 mg/L limitManganese2%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%Iron: 0.0094 mg/L, 5% of the 0.2 mg/L limitIron5%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: 0.0442 mg/L, 44% of the 0.1 mg/L limitTrihalomethanes44%Fluoride: 0.76 mg/L, 51% of the 1.5 mg/L limitFluoride51%
  1. Fluoride51%
  2. Trihalomethanes44%
  3. Nitrate12%
  4. Aluminium11%
  5. Nickel5%
  6. Iron5%
  7. Colour4%
  8. Turbidity3%
  9. Manganese2%
  10. Lead1%
  11. Arsenic1%
  12. Antimony1%
  13. Chromium<1%
  14. Copper<1%
  15. Nitrite<1%
  16. Cadmium<1%
  17. Selenium<1%
  • pH 7.81 pH
  • Conductivity 120 µS/cm
  • Phosphate 0.576 mg/L
All 20 results as a table
SubstanceResultLegal limitShare of limit
Turbidity0.12 NTU4 NTU
3%
pH7.81 pHNo legal limit–
Aluminium0.021 mg/L0.2 mg/L
11%
Iron0.0094 mg/L0.2 mg/L
5%
Colour0.8 mg/L Pt/Co20 mg/L Pt/Co
4%
Manganese0.0008 mg/L0.05 mg/L
2%
Conductivity120 µS/cmNo legal limit–
Cadmium0.00002 mg/L0.005 mg/L
<1%
Chromium0.00042 mg/L0.05 mg/L
<1%
Nickel0.001 mg/L0.02 mg/L
5%
Lead0.00014 mg/L0.01 mg/L
1%
Trihalomethanes0.0442 mg/L0.1 mg/L
44%
Antimony0.000059 mg/L0.005 mg/L
1%
Selenium0.00007 mg/L0.04 mg/L
<1%
Nitrate5.8 mg/L50 mg/L
12%
Nitrite0.003 mg/L0.5 mg/L
<1%
Copper0.0162 mg/L2 mg/L
<1%
Fluoride0.76 mg/L1.5 mg/L
51%
Arsenic0.00014 mg/L0.01 mg/L
1%
Phosphate0.576 mg/LNo legal limit–
Outside your tap

Your river is the Preston Bagot Bk - source to conf R Alne, rated poor

The Environment Agency rated the Preston Bagot Bk - source to conf R Alne 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

101

forever-chemical detections in nearby rivers and groundwater

At 4 sites. The highest was PFOA at 0.008 µg/L, at Grand Union Canal Heronfield Brook, 5.6 km away, in January 2026. These are river and borehole samples, not tests of your tap water.

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

B94 in short

Tap water in B94 (Stratford-on-Avon) is supplied by Severn Trent in the Stratford-on-Avon Central zone and scores 9.2 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 23 December 2025.

  • Fluoride is the reading closest to its limit, at 51% of the 1.5 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
  • 4th cleanest of 8 areas tested in Stratford-on-AvonSquarely mid-table for Stratford-on-Avon, between B49 on 9.3 and CV47 on 8.9.
  • PFAS found at 4 monitoring sites within 10 kmThose are river and groundwater samples, not tap water. The highest was PFOA about 5.6 km away. What was measured

Next door

B959.3 out of 10B808.9 out of 10B499.3 out of 10B508.9 out of 10CV369.0 out of 10CV478.9 out of 10CV379.3 out of 10B909.3 out of 10

Questions about B94 water

Is B94 tap water safe to drink?

Based on the latest tests, B94 (Stratford-on-Avon) water scores 9.2/10, which is safe. 0 of 20 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.

What contaminants are in B94 water?

We tested 20 contaminants in B94 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 B94?

B94 (Stratford-on-Avon) 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 B94?

B94 water scored 9.2/10 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 B94 water?

The tap-water tests we hold for B94 do not include a PFAS result. Environment Agency monitoring found PFAS in 101 river and groundwater samples from 4 sites within 10 km of B94, the highest being PFOA at 0.008 µg/L about 5.6 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 B94?

The Environment Agency rated the Preston Bagot Bk - source to conf R Alne 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 B94, 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 B94

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
Turbidity23.6 NTU4 NTU
pH7.99 pHNone
Temperature14.8 °CNone
Nitrate1.8 mg/L50 mg/L
Nitrite0.0041 mg/L0.5 mg/L
Phosphate0.19 mg/LNone
Dissolved Oxygen9.09 mg/LNone
Ammonia0.053 mg/L0.5 mg/L
Conductivity864 µS/cmNone

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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