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tapwater
England and Wales average 9.0

Tap water in TF7, Telford and WrekinSafe to drink.

Supplied by Severn Trent. 717 samples, 20 substances, latest on 19 December 2025. Everything is inside the legal limit. One result, nitrate, sits close to the line.

See the filter we recommendSee everything that was tested

9.0 / 10

The tank is as full as the score.

What to do about it

Waterdrop G3P600 Reverse Osmosis

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Removes nitrate, the result that stood out in TF7.

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Osmio PRO-III Ultimate Whole House

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Removes nitrate, the result that stood out in TF7.

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ZeroWater 12-Cup Ready-Pour

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Removes nitrate, the result that stood out in TF7.

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What's in a glass of TF7 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.

Nitrate came closest to a limit, at 83% of it. 16 of 17 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%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%Selenium: 0.00039 mg/L, <1% of the 0.04 mg/L limitSelenium<1%Antimony: 0.000059 mg/L, 1% of the 0.005 mg/L limitAntimony1%Turbidity: 0.12 NTU, 3% of the 4 NTU limitTurbidity3%Copper: 0.0662 mg/L, 3% of the 2 mg/L limitCopper3%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: 0.0047 mg/L, 5% of the 0.1 mg/L limitTrihalomethanes5%Manganese: 0.00241 mg/L, 5% of the 0.05 mg/L limitManganese5%Nickel: 0.001 mg/L, 5% of the 0.02 mg/L limitNickel5%Lead: 0.00089 mg/L, 9% of the 0.01 mg/L limitLead9%Fluoride: 0.14 mg/L, 9% of the 1.5 mg/L limitFluoride9%Aluminium: 0.021 mg/L, 11% of the 0.2 mg/L limitAluminium11%Arsenic: 0.0015 mg/L, 15% of the 0.01 mg/L limitArsenic15%Nitrate: 41.5 mg/L, 83% of the 50 mg/L limitNitrate83%
  1. Nitrate83%
  2. Arsenic15%
  3. Aluminium11%
  4. Fluoride9%
  5. Lead9%
  6. Nickel5%
  7. Manganese5%
  8. Trihalomethanes5%
  9. Colour4%
  10. Iron3%
  11. Copper3%
  12. Turbidity3%
  13. Antimony1%
  14. Selenium<1%
  15. Chromium<1%
  16. Nitrite<1%
  17. Cadmium<1%
  • pH 7.4 pH
  • Conductivity 601 µS/cm
  • Phosphate 0.091 mg/L
All 20 results as a table
SubstanceResultLegal limitShare of limit
Nitrate41.5 mg/L50 mg/L
83%
Aluminium0.021 mg/L0.2 mg/L
11%
Iron0.007 mg/L0.2 mg/L
3%
Manganese0.00241 mg/L0.05 mg/L
5%
pH7.4 pHNo legal limit–
Copper0.0662 mg/L2 mg/L
3%
Colour0.8 mg/L Pt/Co20 mg/L Pt/Co
4%
Fluoride0.14 mg/L1.5 mg/L
9%
Arsenic0.0015 mg/L0.01 mg/L
15%
Turbidity0.12 NTU4 NTU
3%
Cadmium0.00002 mg/L0.005 mg/L
<1%
Chromium0.00042 mg/L0.05 mg/L
<1%
Nickel0.001 mg/L0.02 mg/L
5%
Nitrite0.003 mg/L0.5 mg/L
<1%
Lead0.00089 mg/L0.01 mg/L
9%
Antimony0.000059 mg/L0.005 mg/L
1%
Selenium0.00039 mg/L0.04 mg/L
<1%
Conductivity601 µS/cmNo legal limit–
Trihalomethanes0.0047 mg/L0.1 mg/L
5%
Phosphate0.091 mg/LNo legal limit–
Outside your tap

Your river is the Mad Bk - source to conf R Worfe, rated moderate

The Environment Agency rated the Mad Bk - source to conf R Worfe as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by fish, ammonia and dissolved oxygen. 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

TF7 in short

Tap water in TF7 (Telford and Wrekin) is supplied by Severn Trent in the Telford and Wrekin Central zone and scores 9.0 out of 10, against an England and Wales average of 9.0. 1 of 20 tested substances was close to or over a limit. The latest sample is from 19 December 2025.

  • Nitrate is within its legal limit but flagged, at 83% of the 50 mg/L maximumAnything over three quarters of a limit is flagged here as worth watching. It has not gone over. See every reading
  • 8th cleanest of 9 areas tested in Telford and Wrekin1 area in Telford and Wrekin scored lower. The best is TF6 on 9.7.
  • Scores higher than 1 of 8 neighbouring districtsWater here is typical for the immediate area, which usually means the same treatment works and the same supply zone.

Next door

TF19.3 out of 10TF39.1 out of 10TF29.2 out of 10TF59.3 out of 10TF89.1 out of 10TF108.4 out of 10TF49.3 out of 10TF69.7 out of 10

Questions about TF7 water

Is TF7 tap water safe to drink?

Based on the latest tests, TF7 (Telford and Wrekin) water scores 9/10, which is safe. 1 of 20 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.

What contaminants are in TF7 water?

We tested 20 contaminants in TF7 water. 1 were flagged, including Nitrate.

Who supplies water in TF7?

TF7 (Telford and Wrekin) 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 TF7?

With 1 contaminant above recommended levels in TF7, a water filter could help. A filter jug or under-sink filter can reduce most common contaminants. See our filter recommendations for your area.

Are there PFAS forever chemicals in TF7 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for TF7, and the Environment Agency has no PFAS detections in rivers or groundwater within 10 km of it. That reflects where sampling has happened as much as the water itself.

How clean is the river near TF7?

The Environment Agency rated the Mad Bk - source to conf R Worfe as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by fish, ammonia and dissolved oxygen. 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 TF7, which is treated before it reaches homes.

Keep reading

Nitrate levelsHow to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map

River and groundwater readings near TF7

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
Turbidity12 NTU4 NTU
pH7.79 pHNone
Temperature5.8 °CNone
Conductivity330 µS/cmNone
Ammonia0.084 mg/L0.5 mg/L
Nitrate3.7 mg/L50 mg/L
Nitrite0.028 mg/L0.5 mg/L
Phosphate0.085 mg/LNone
Dissolved Oxygen12 mg/LNone
Lead0.00159 mg/L0.01 mg/L
Hardness (as CaCO3)112 mg/LNone
Zinc0.00928 mg/LNone
Copper0.00446 mg/L2 mg/L
Chromium0.000534 mg/L0.05 mg/L
Cadmium0.00018 mg/L0.005 mg/L

Get alerts for your area

We'll email you when water quality data changes for TF7.

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