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tapwater
England and Wales average 9.0

Tap water in CT1, CanterburyToo few tap tests to call it.

Supplied by Southern Water. 16 substances, latest on 3 September 2026. These are river and groundwater samples near CT1, not tests of treated tap water, so treat the score as a rough guide.

See the filter we recommendSee everything that was tested

9.2 / 10

The tank is as full as the score.

What to do about it

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What's in a glass of CT1 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.

Turbidity came closest to a limit, at 33% of it. 8 of 10 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitCopper: 0.00018 mg/L, <1% of the 2 mg/L limitCopper<1%Ammonia: 0.00048 mg/L, <1% of the 0.5 mg/L limitAmmonia<1%Lead: 0.00002 mg/L, <1% of the 0.01 mg/L limitLead<1%Chromium: 0.00058 mg/L, 1% of the 0.05 mg/L limitChromium1%Nitrite: 0.019 mg/L, 4% of the 0.5 mg/L limitNitrite4%Nickel: 0.0016 mg/L, 8% of the 0.02 mg/L limitNickel8%Iron: 0.031 mg/L, 16% of the 0.2 mg/L limitIron16%Nitrate: 11 mg/L, 22% of the 50 mg/L limitNitrate22%Manganese: 0.015 mg/L, 30% of the 0.05 mg/L limitManganese30%Turbidity: 1.3 NTU, 33% of the 4 NTU limitTurbidity33%
  1. Turbidity33%
  2. Manganese30%
  3. Nitrate22%
  4. Iron16%
  5. Nickel8%
  6. Nitrite4%
  7. Chromium1%
  8. Lead<1%
  9. Ammonia<1%
  10. Copper<1%
  • pH 7.74 pH
  • Temperature 17.3 °C
  • Conductivity 673 µS/cm
  • Phosphate 0.12 mg/L
  • Dissolved Oxygen 9.86 mg/L
  • Zinc 0.0066 mg/L
All 16 results as a table
SubstanceResultLegal limitShare of limit
pH7.74 pHNo legal limit–
Temperature17.3 °CNo legal limit–
Conductivity673 µS/cmNo legal limit–
Nitrate11 mg/L50 mg/L
22%
Nitrite0.019 mg/L0.5 mg/L
4%
Phosphate0.12 mg/LNo legal limit–
Dissolved Oxygen9.86 mg/LNo legal limit–
Lead0.00002 mg/L0.01 mg/L
<1%
Nickel0.0016 mg/L0.02 mg/L
8%
Turbidity1.3 NTU4 NTU
33%
Ammonia0.00048 mg/L0.5 mg/L
<1%
Zinc0.0066 mg/LNo legal limit–
Chromium0.00058 mg/L0.05 mg/L
1%
Copper0.00018 mg/L2 mg/L
<1%
Iron0.031 mg/L0.2 mg/L
16%
Manganese0.015 mg/L0.05 mg/L
30%
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

CT1 in short

Tap water in CT1 (Canterbury) is supplied by Southern Water in the Canterbury Central zone and scores 9.2 out of 10, against an England and Wales average of 9.0. None of the 16 tested substances came close to a limit. The latest sample is from 3 September 2026.

  • 3rd cleanest of 5 areas tested in CanterburySquarely mid-table for Canterbury, between CT2 on 9.5 and CT5 on 8.1.
  • Nothing tested came within 40% of its legal limitThe highest was Turbidity at 33% of the 4 NTU maximum. See every reading
  • Scores higher than 2 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

CT29.5 out of 10CT49.5 out of 10CT68.4 out of 10CT58.1 out of 10

Questions about CT1 water

Is CT1 tap water safe to drink?

Based on the latest tests, CT1 (Canterbury) water scores 9.2/10, which is safe. 0 of 16 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.

What contaminants are in CT1 water?

We tested 16 contaminants in CT1 water. None exceeded recommended safe levels.

Who supplies water in CT1?

CT1 (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 CT1?

CT1 water scored 9.2/10 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 CT1 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for CT1, 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 CT1?

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 CT1, which is treated before it reaches homes.

Keep reading

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