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tapwater
England and Wales average 9.0

Tap water in CT7, ThanetSafe to drink.

Supplied by Southern Water. 13,437 samples, 22 substances, latest on 29 April 2026. 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

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What's in a glass of CT7 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 61% of it. 16 of 17 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitLead: 0.00009 mg/L, <1% of the 0.01 mg/L limitLead<1%Copper: 0.0328 mg/L, 2% of the 2 mg/L limitCopper2%Nitrite: 0.009 mg/L, 2% of the 0.5 mg/L limitNitrite2%Chromium: 0.001 mg/L, 2% of the 0.05 mg/L limitChromium2%Selenium: 0.0008 mg/L, 2% of the 0.04 mg/L limitSelenium2%Cadmium: 0.00012 mg/L, 2% of the 0.005 mg/L limitCadmium2%Turbidity: 0.13 NTU, 3% of the 4 NTU limitTurbidity3%Manganese: 0.00178 mg/L, 4% of the 0.05 mg/L limitManganese4%Iron: 0.00928 mg/L, 5% of the 0.2 mg/L limitIron5%Trihalomethanes: 0.00564 mg/L, 6% of the 0.1 mg/L limitTrihalomethanes6%Aluminium: 0.0113 mg/L, 6% of the 0.2 mg/L limitAluminium6%Antimony: 0.0003 mg/L, 6% of the 0.005 mg/L limitAntimony6%Nickel: 0.0013 mg/L, 7% of the 0.02 mg/L limitNickel7%Ammonia: 0.039 mg/L, 8% of the 0.5 mg/L limitAmmonia8%Arsenic: 0.001 mg/L, 10% of the 0.01 mg/L limitArsenic10%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Nitrate: 30.6 mg/L, 61% of the 50 mg/L limitNitrate61%
  1. Nitrate61%
  2. Colour15%
  3. Arsenic10%
  4. Ammonia8%
  5. Nickel7%
  6. Antimony6%
  7. Aluminium6%
  8. Trihalomethanes6%
  9. Iron5%
  10. Manganese4%
  11. Turbidity3%
  12. Cadmium2%
  13. Chromium2%
  14. Selenium2%
  15. Nitrite2%
  16. Copper2%
  17. Lead<1%
  • Coliform Bacteria none found
  • E. coli none found
  • Conductivity 686 µS/cm
  • pH 7.4 pH
  • PFAS (total) 0.0256 µg/L
All 22 results as a table
SubstanceResultLegal limitShare of limit
Coliform Bacteria0 count/100mlMust be zeroNone found
E. coli0 count/100mlMust be zeroNone found
Aluminium0.0113 mg/L0.2 mg/L
6%
Iron0.00928 mg/L0.2 mg/L
5%
Manganese0.00178 mg/L0.05 mg/L
4%
Nitrate30.6 mg/L50 mg/L
61%
Lead0.00009 mg/L0.01 mg/L
<1%
Conductivity686 µS/cmNo legal limit–
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Turbidity0.13 NTU4 NTU
3%
pH7.4 pHNo legal limit–
Nitrite0.009 mg/L0.5 mg/L
2%
Ammonia0.039 mg/L0.5 mg/L
8%
Copper0.0328 mg/L2 mg/L
2%
Arsenic0.001 mg/L0.01 mg/L
10%
Cadmium0.00012 mg/L0.005 mg/L
2%
Chromium0.001 mg/L0.05 mg/L
2%
Nickel0.0013 mg/L0.02 mg/L
7%
Antimony0.0003 mg/L0.005 mg/L
6%
Selenium0.0008 mg/L0.04 mg/L
2%
Trihalomethanes0.00564 mg/L0.1 mg/L
6%
PFAS (total)0.0256 µg/LNo legal limit–
Outside your tap

Your coastal water is the Kent North, rated moderate

The Environment Agency rated the Kent North as moderate for ecological health in its 2025 assessment, meaning the coastal water is noticeably changed by pollution or engineering. It is held back by nitrogen. 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

CT7 in short

Tap water in CT7 (Thanet) is supplied by Southern Water in the Thanet Central zone and scores 9.3 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 29 April 2026.

  • Nitrate is the reading closest to its limit, at 61% of the 50 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
  • 5th cleanest of 6 areas tested in Thanet1 area in Thanet scored lower. The best is CT11 on 9.4.
  • Scores higher than 0 of 5 neighbouring districtsWater here is typical for the immediate area, which usually means the same treatment works and the same supply zone.

Next door

CT109.3 out of 10CT89.4 out of 10CT119.4 out of 10CT129.4 out of 10CT99.3 out of 10

Questions about CT7 water

Is CT7 tap water safe to drink?

Based on the latest tests, CT7 (Thanet) water scores 9.3/10, which is safe. 0 of 22 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.

What contaminants are in CT7 water?

We tested 22 contaminants in CT7 water. None exceeded recommended safe levels. PFAS (forever chemicals) were also detected at 0.02563 µg/L in local drinking water tests.

Who supplies water in CT7?

CT7 (Thanet) is supplied by Southern Water. You can view their full profile and compliance data on our supplier page.

Should I use a water filter in CT7?

CT7 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 CT7 water?

Yes, PFAS (per- and polyfluoroalkyl substances) have been detected in CT7 at 0.02563 µg/L from drinking monitoring. The UK currently has no legal limit for PFAS in drinking water. Reverse osmosis and activated carbon filters can reduce PFAS levels.

How clean is the coastal water near CT7?

The Environment Agency rated the Kent North as moderate for ecological health in its 2025 assessment, meaning the coastal water is noticeably changed by pollution or engineering. It is held back by nitrogen. 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 coastal water, not of tap water in CT7, 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 CT7

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
Temperature13.4 °CNone
Conductivity872 µS/cmNone
Nitrate17 mg/L50 mg/L
Dissolved Oxygen8.72 mg/LNone
Copper0.0016 mg/L2 mg/L
Ammonia0.14 mg/L0.5 mg/L
Nitrite0.03 mg/L0.5 mg/L
Phosphate0.042 mg/LNone
Cadmium0.000017 mg/L0.005 mg/L
Hardness (as CaCO3)611 mg/LNone
Fluoride0.16 mg/L1.5 mg/L
Lead0.00001 mg/L0.01 mg/L

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Source: Southern Water 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