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tapwater
England and Wales average 9.0

Tap water in CT2, CanterburySafe to drink.

Supplied by Southern Water. 1,417 samples, 21 substances, latest on 23 April 2026. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.5 / 10

The tank is as full as the score.

What to do about it

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Basic chlorine and taste improvement on a budget

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What's in a glass of CT2 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 49% of it. 16 of 17 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitCadmium: 0.00001 mg/L, <1% of the 0.005 mg/L limitCadmium<1%Chromium: 0.00021 mg/L, <1% of the 0.05 mg/L limitChromium<1%Copper: 0.01 mg/L, <1% of the 2 mg/L limitCopper<1%Lead: 0.00009 mg/L, <1% of the 0.01 mg/L limitLead<1%Antimony: 0.00005 mg/L, 1% of the 0.005 mg/L limitAntimony1%Nitrite: 0.007 mg/L, 1% of the 0.5 mg/L limitNitrite1%Selenium: 0.00064 mg/L, 2% of the 0.04 mg/L limitSelenium2%Arsenic: 0.00022 mg/L, 2% of the 0.01 mg/L limitArsenic2%Turbidity: 0.13 NTU, 3% of the 4 NTU limitTurbidity3%Manganese: 0.00178 mg/L, 4% of the 0.05 mg/L limitManganese4%Nickel: 0.00087 mg/L, 4% of the 0.02 mg/L limitNickel4%Iron: 0.00928 mg/L, 5% of the 0.2 mg/L limitIron5%Ammonia: 0.025 mg/L, 5% of the 0.5 mg/L limitAmmonia5%Aluminium: 0.0113 mg/L, 6% of the 0.2 mg/L limitAluminium6%Trihalomethanes: 0.00742 mg/L, 7% of the 0.1 mg/L limitTrihalomethanes7%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Nitrate: 24.4 mg/L, 49% of the 50 mg/L limitNitrate49%
  1. Nitrate49%
  2. Colour15%
  3. Trihalomethanes7%
  4. Aluminium6%
  5. Ammonia5%
  6. Iron5%
  7. Nickel4%
  8. Manganese4%
  9. Turbidity3%
  10. Arsenic2%
  11. Selenium2%
  12. Nitrite1%
  13. Antimony1%
  14. Lead<1%
  15. Copper<1%
  16. Chromium<1%
  17. Cadmium<1%
  • pH 7.4 pH
  • Coliform Bacteria none found
  • E. coli none found
  • Conductivity 677 µS/cm
All 21 results as a table
SubstanceResultLegal limitShare of limit
pH7.4 pHNo legal limit–
Nitrate24.4 mg/L50 mg/L
49%
Aluminium0.0113 mg/L0.2 mg/L
6%
Iron0.00928 mg/L0.2 mg/L
5%
Manganese0.00178 mg/L0.05 mg/L
4%
Lead0.00009 mg/L0.01 mg/L
<1%
Coliform Bacteria0 count/100mlMust be zeroNone found
E. coli0 count/100mlMust be zeroNone found
Conductivity677 µS/cmNo legal limit–
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Turbidity0.13 NTU4 NTU
3%
Trihalomethanes0.00742 mg/L0.1 mg/L
7%
Nitrite0.007 mg/L0.5 mg/L
1%
Ammonia0.025 mg/L0.5 mg/L
5%
Copper0.01 mg/L2 mg/L
<1%
Arsenic0.00022 mg/L0.01 mg/L
2%
Cadmium0.00001 mg/L0.005 mg/L
<1%
Chromium0.00021 mg/L0.05 mg/L
<1%
Nickel0.00087 mg/L0.02 mg/L
4%
Antimony0.00005 mg/L0.005 mg/L
1%
Selenium0.00064 mg/L0.04 mg/L
2%
Outside your tap

Your river is the Great Stour between A2 and West Stourmouth, rated moderate

The Environment Agency rated the Great Stour between A2 and West Stourmouth as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by phosphate and fish. 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

CT2 in short

Tap water in CT2 (Canterbury) is supplied by Southern Water in the Canterbury Central zone and scores 9.5 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 23 April 2026.

  • The cleanest tap water of the 5 areas tested in CanterburyCT2 scores 9.5 out of 10, ahead of CT4 in second place on 9.5.
  • Nitrate is the reading closest to its limit, at 49% 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 3 of 4 neighbouring districtsWater here is typical for the immediate area, which usually means the same treatment works and the same supply zone.

Next door

CT19.2 out of 10CT49.5 out of 10CT68.4 out of 10CT58.1 out of 10

Questions about CT2 water

Is CT2 tap water safe to drink?

Based on the latest tests, CT2 (Canterbury) water scores 9.5/10, which is safe. 0 of 21 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.

What contaminants are in CT2 water?

We tested 21 contaminants in CT2 water. None exceeded recommended safe levels.

Who supplies water in CT2?

CT2 (Canterbury) 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 CT2?

CT2 water scored 9.5/10 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 CT2 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for CT2, 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 CT2?

The Environment Agency rated the Great Stour between A2 and West Stourmouth as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by phosphate and fish. 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 CT2, 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 CT2

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
pH8.14 pHNone
Temperature7.8 °CNone
Conductivity471 µS/cmNone
Ammonia0.035 mg/L0.5 mg/L
Nitrate3.2 mg/L50 mg/L
Nitrite0.012 mg/L0.5 mg/L
Phosphate0.074 mg/LNone
Dissolved Oxygen11.8 mg/LNone
Lead0.00002 mg/L0.01 mg/L
Nickel0.0016 mg/L0.02 mg/L
Turbidity1.3 NTU4 NTU
Zinc0.0066 mg/LNone
Chromium0.00058 mg/L0.05 mg/L
Copper0.00018 mg/L2 mg/L
Iron0.031 mg/L0.2 mg/L
Manganese0.015 mg/L0.05 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