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tapwater
England and Wales average 9.0

Tap water in DY3, DudleySafe to drink.

Supplied by Severn Trent. 354 samples, 20 substances, latest on 4 December 2025. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

8.6 / 10

The tank is as full as the score.

What to do about it

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What's in a glass of DY3 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 72% of it. 14 of 17 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitCopper: 0.0078 mg/L, <1% of the 2 mg/L limitCopper<1%Nitrite: 0.003 mg/L, <1% of the 0.5 mg/L limitNitrite<1%Cadmium: 0.00004 mg/L, <1% of the 0.005 mg/L limitCadmium<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%Manganese: 0.00073 mg/L, 1% of the 0.05 mg/L limitManganese1%Selenium: 0.00061 mg/L, 2% of the 0.04 mg/L limitSelenium2%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%Trihalomethanes: 0.005 mg/L, 5% of the 0.1 mg/L limitTrihalomethanes5%Nickel: 0.0012 mg/L, 6% of the 0.02 mg/L limitNickel6%Aluminium: 0.021 mg/L, 11% of the 0.2 mg/L limitAluminium11%Arsenic: 0.00273 mg/L, 27% of the 0.01 mg/L limitArsenic27%Nitrate: 34 mg/L, 68% of the 50 mg/L limitNitrate68%Fluoride: 1.08 mg/L, 72% of the 1.5 mg/L limitFluoride72%
  1. Fluoride72%
  2. Nitrate68%
  3. Arsenic27%
  4. Aluminium11%
  5. Nickel6%
  6. Trihalomethanes5%
  7. Colour4%
  8. Iron3%
  9. Turbidity3%
  10. Selenium2%
  11. Manganese1%
  12. Lead1%
  13. Antimony1%
  14. Chromium<1%
  15. Cadmium<1%
  16. Nitrite<1%
  17. Copper<1%
  • pH 7.2 pH
  • Conductivity 619 µS/cm
  • Phosphate 0.877 mg/L
All 20 results as a table
SubstanceResultLegal limitShare of limit
Aluminium0.021 mg/L0.2 mg/L
11%
Colour0.8 mg/L Pt/Co20 mg/L Pt/Co
4%
Manganese0.00073 mg/L0.05 mg/L
1%
Turbidity0.12 NTU4 NTU
3%
Iron0.007 mg/L0.2 mg/L
3%
pH7.2 pHNo legal limit–
Conductivity619 µS/cmNo legal limit–
Fluoride1.08 mg/L1.5 mg/L
72%
Arsenic0.00273 mg/L0.01 mg/L
27%
Cadmium0.00004 mg/L0.005 mg/L
<1%
Chromium0.00042 mg/L0.05 mg/L
<1%
Nickel0.0012 mg/L0.02 mg/L
6%
Lead0.00014 mg/L0.01 mg/L
1%
Antimony0.000059 mg/L0.005 mg/L
1%
Selenium0.00061 mg/L0.04 mg/L
2%
Nitrate34 mg/L50 mg/L
68%
Nitrite0.003 mg/L0.5 mg/L
<1%
Copper0.0078 mg/L2 mg/L
<1%
Trihalomethanes0.005 mg/L0.1 mg/L
5%
Phosphate0.877 mg/LNo legal limit–
Outside your tap

Your river is the Bobs-Holbeche Bk - source to conf Smestow Bk, rated poor

The Environment Agency rated the Bobs-Holbeche Bk - source to conf Smestow Bk 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 insects and other small river life 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

24

forever-chemical detections in nearby rivers and groundwater

At 5 sites. The highest was PFBS at 0.0077 µg/L, at Smestow Brook at Presswood, 7.9 km away, in March 2026. These are river and borehole samples, not tests of your tap water.

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

DY3 in short

Tap water in DY3 (Dudley) is supplied by Severn Trent in the Dudley Central zone and scores 8.6 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 4 December 2025.

  • The lowest score of the 9 areas tested in DudleyDY3 scores 8.6 out of 10. The best in Dudley, DY8, scores 9.2.
  • Fluoride is the reading closest to its limit, at 72% 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 5 monitoring sites within 10 kmThose are river and groundwater samples, not tap water. The highest was PFBS about 7.9 km away. What was measured

Next door

B638.7 out of 10B628.6 out of 10DY89.2 out of 10DY58.9 out of 10DY98.8 out of 10DY28.8 out of 10DY68.7 out of 10DY18.9 out of 10

Questions about DY3 water

Is DY3 tap water safe to drink?

Based on the latest tests, DY3 (Dudley) water scores 8.6/10, which is safe. 0 of 20 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.

What contaminants are in DY3 water?

We tested 20 contaminants in DY3 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 DY3?

DY3 (Dudley) 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 DY3?

DY3 water scored 8.6/10 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 DY3 water?

The tap-water tests we hold for DY3 do not include a PFAS result. Environment Agency monitoring found PFAS in 24 river and groundwater samples from 5 sites within 10 km of DY3, the highest being PFBS at 0.0077 µg/L about 7.9 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 DY3?

The Environment Agency rated the Bobs-Holbeche Bk - source to conf Smestow Bk 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 insects and other small river life 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 DY3, 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 DY3

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
Ammonia3.15 mg/L0.5 mg/L
Iron0.226 mg/L0.2 mg/L
pH7.8 pHNone
Temperature7.6 °CNone
Conductivity1032 µS/cmNone
Nitrate29.2 mg/L50 mg/L
Nitrite0.325 mg/L0.5 mg/L
Phosphate0.584 mg/LNone
Dissolved Oxygen11.5 mg/LNone
Copper0.00593 mg/L2 mg/L
Hardness (as CaCO3)343 mg/LNone
Zinc0.0318 mg/LNone
Chromium0.0021 mg/L0.05 mg/L
PFAS (total)0.00871 µg/LNone

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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