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tapwater
England and Wales average 9.0

Tap water in CT9, ThanetSafe to drink.

Supplied by Southern Water. 16,694 samples, 21 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 CT9 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 60% of it. 16 of 17 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitCopper: 0.0146 mg/L, <1% of the 2 mg/L limitCopper<1%Lead: 0.00011 mg/L, 1% of the 0.01 mg/L limitLead1%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%Antimony: 0.0002 mg/L, 4% of the 0.005 mg/L limitAntimony4%Iron: 0.00928 mg/L, 5% of the 0.2 mg/L limitIron5%Aluminium: 0.0113 mg/L, 6% of the 0.2 mg/L limitAluminium6%Nickel: 0.0012 mg/L, 6% of the 0.02 mg/L limitNickel6%Trihalomethanes: 0.00609 mg/L, 6% of the 0.1 mg/L limitTrihalomethanes6%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: 30.1 mg/L, 60% of the 50 mg/L limitNitrate60%
  1. Nitrate60%
  2. Colour15%
  3. Arsenic10%
  4. Ammonia8%
  5. Trihalomethanes6%
  6. Nickel6%
  7. Aluminium6%
  8. Iron5%
  9. Antimony4%
  10. Manganese4%
  11. Turbidity3%
  12. Cadmium2%
  13. Chromium2%
  14. Selenium2%
  15. Nitrite2%
  16. Lead1%
  17. Copper<1%
  • Coliform Bacteria none found
  • E. coli none found
  • pH 7.8 pH
  • Conductivity 681 µS/cm
All 21 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%
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Turbidity0.13 NTU4 NTU
3%
pH7.8 pHNo legal limit–
Lead0.00011 mg/L0.01 mg/L
1%
Conductivity681 µS/cmNo legal limit–
Nitrate30.1 mg/L50 mg/L
60%
Ammonia0.039 mg/L0.5 mg/L
8%
Copper0.0146 mg/L2 mg/L
<1%
Nitrite0.009 mg/L0.5 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%
Nickel0.0012 mg/L0.02 mg/L
6%
Antimony0.0002 mg/L0.005 mg/L
4%
Selenium0.0008 mg/L0.04 mg/L
2%
Trihalomethanes0.00609 mg/L0.1 mg/L
6%
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

CT9 in short

Tap water in CT9 (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 21 tested substances came close to a limit. The latest sample is from 29 April 2026.

  • The lowest score of the 6 areas tested in ThanetCT9 scores 9.3 out of 10. The best in Thanet, CT11, scores 9.4.
  • Nitrate is the reading closest to its limit, at 60% of the 50 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
  • 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 10CT79.3 out of 10CT89.4 out of 10CT119.4 out of 10CT129.4 out of 10

Questions about CT9 water

Is CT9 tap water safe to drink?

Based on the latest tests, CT9 (Thanet) water scores 9.3/10, which is safe. 0 of 21 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.

What contaminants are in CT9 water?

We tested 21 contaminants in CT9 water. None exceeded recommended safe levels.

Who supplies water in CT9?

CT9 (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 CT9?

CT9 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 CT9 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for CT9, 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 coastal water near CT9?

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 CT9, which is treated before it reaches homes.

Keep reading

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

River and groundwater readings near CT9

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
pH6.9 pHNone
Temperature13.8 °CNone
Conductivity1013 µS/cmNone
Dissolved Oxygen7.94 mg/LNone
Nitrate11 mg/L50 mg/L
Phosphate0.012 mg/LNone
Boron0.16 mg/L1 mg/L
Copper0.0016 mg/L2 mg/L
Lead0.00005 mg/L0.01 mg/L
Zinc0.04 mg/LNone
Nickel0.0025 mg/L0.02 mg/L
Manganese0.00072 mg/L0.05 mg/L

Get alerts for your area

We'll email you when water quality data changes for CT9.

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