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tapwater
England and Wales average 9.0

Tap water in DY9, DudleySafe to drink.

Supplied by Severn Trent. 1,421 samples, 22 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

8.8 / 10

The tank is as full as the score.

What to do about it

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What's in a glass of DY9 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 66% of it. 16 of 19 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitCadmium: 0.00002 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%Selenium: 0.00043 mg/L, 1% of the 0.04 mg/L limitSelenium1%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%Copper: 0.0281 mg/L, 1% of the 2 mg/L limitCopper1%Manganese: 0.00073 mg/L, 1% of the 0.05 mg/L limitManganese1%Mercury: 0.000022 mg/L, 2% of the 0.001 mg/L limitMercury2%Nitrite: 0.013 mg/L, 3% of the 0.5 mg/L limitNitrite3%Turbidity: 0.12 NTU, 3% of the 4 NTU limitTurbidity3%Boron: 0.03 mg/L, 3% of the 1 mg/L limitBoron3%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%Aluminium: 0.021 mg/L, 11% of the 0.2 mg/L limitAluminium11%Nickel: 0.0024 mg/L, 12% of the 0.02 mg/L limitNickel12%Arsenic: 0.00137 mg/L, 14% of the 0.01 mg/L limitArsenic14%Trihalomethanes: 0.0361 mg/L, 36% of the 0.1 mg/L limitTrihalomethanes36%Nitrate: 23 mg/L, 46% of the 50 mg/L limitNitrate46%Fluoride: 0.99 mg/L, 66% of the 1.5 mg/L limitFluoride66%
  1. Fluoride66%
  2. Nitrate46%
  3. Trihalomethanes36%
  4. Arsenic14%
  5. Nickel12%
  6. Aluminium11%
  7. Colour4%
  8. Iron3%
  9. Turbidity3%
  10. Boron3%
  11. Nitrite3%
  12. Mercury2%
  13. Manganese1%
  14. Copper1%
  15. Lead1%
  16. Antimony1%
  17. Selenium1%
  18. Chromium<1%
  19. Cadmium<1%
  • pH 8.03 pH
  • Conductivity 377 µS/cm
  • Phosphate 0.992 mg/L
All 22 results as a table
SubstanceResultLegal limitShare of limit
Colour0.8 mg/L Pt/Co20 mg/L Pt/Co
4%
Turbidity0.12 NTU4 NTU
3%
pH8.03 pHNo legal limit–
Nitrate23 mg/L50 mg/L
46%
Nitrite0.013 mg/L0.5 mg/L
3%
Aluminium0.021 mg/L0.2 mg/L
11%
Iron0.007 mg/L0.2 mg/L
3%
Manganese0.00073 mg/L0.05 mg/L
1%
Copper0.0281 mg/L2 mg/L
1%
Fluoride0.99 mg/L1.5 mg/L
66%
Arsenic0.00137 mg/L0.01 mg/L
14%
Cadmium0.00002 mg/L0.005 mg/L
<1%
Chromium0.00042 mg/L0.05 mg/L
<1%
Mercury0.000022 mg/L0.001 mg/L
2%
Nickel0.0024 mg/L0.02 mg/L
12%
Lead0.00014 mg/L0.01 mg/L
1%
Antimony0.000059 mg/L0.005 mg/L
1%
Selenium0.00043 mg/L0.04 mg/L
1%
Conductivity377 µS/cmNo legal limit–
Boron0.03 mg/L1 mg/L
3%
Trihalomethanes0.0361 mg/L0.1 mg/L
36%
Phosphate0.992 mg/LNo legal limit–
Outside your tap

Your river is the Blakedown Bk - source to conf R Stour, rated poor

The Environment Agency rated the Blakedown Bk - source to conf R Stour 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, phosphate and insects and other small river life. 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

14

forever-chemical detections in nearby rivers and groundwater

At 1 site. The highest was PFBS at 0.0077 µg/L, at Smestow Brook at Presswood, 7.4 km away, in March 2026. These are river and borehole samples, not tests of your tap water.

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

DY9 in short

Tap water in DY9 (Dudley) is supplied by Severn Trent in the Dudley Central zone and scores 8.8 out of 10, against an England and Wales average of 9.0. None of the 22 tested substances came close to a limit. The latest sample is from 23 December 2025.

  • Fluoride is the reading closest to its limit, at 66% of the 1.5 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
  • 5th cleanest of 9 areas tested in DudleySquarely mid-table for Dudley, between DY8 on 9.2 and DY3 on 8.6.
  • PFAS found at 1 monitoring site within 10 kmThose are river and groundwater samples, not tap water. The highest was PFBS about 7.4 km away. What was measured

Next door

B628.6 out of 10B638.7 out of 10DY38.6 out of 10DY58.9 out of 10DY89.2 out of 10DY68.7 out of 10DY28.8 out of 10DY18.9 out of 10

Questions about DY9 water

Is DY9 tap water safe to drink?

Based on the latest tests, DY9 (Dudley) water scores 8.8/10, which is safe. 0 of 22 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.

What contaminants are in DY9 water?

We tested 22 contaminants in DY9 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 DY9?

DY9 (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 DY9?

DY9 water scored 8.8/10 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 DY9 water?

The tap-water tests we hold for DY9 do not include a PFAS result. Environment Agency monitoring found PFAS in 14 river and groundwater samples from 1 sites within 10 km of DY9, the highest being PFBS at 0.0077 µg/L about 7.4 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 DY9?

The Environment Agency rated the Blakedown Bk - source to conf R Stour 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, phosphate and insects and other small river life. 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 DY9, 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 DY9

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
Turbidity3.3 NTU4 NTU
pH7.66 pHNone
Temperature14.3 °CNone
Conductivity902 µS/cmNone
Nitrate1.9 mg/L50 mg/L
Nitrite0.018 mg/L0.5 mg/L
Phosphate0.042 mg/LNone
Zinc0.02 mg/LNone
Dissolved Oxygen8.41 mg/LNone
Ammonia0.036 mg/L0.5 mg/L
Copper0.0044 mg/L2 mg/L
Hardness (as CaCO3)409 mg/LNone
Chromium0.024 mg/L0.05 mg/L

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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