Tap water in CT6, CanterburyToo few tap tests to call it.
Supplied by Southern Water. 9 substances, latest on 18 September 2026. These are river and groundwater samples near CT6, not tests of treated tap water, so treat the score as a rough guide.
8.4 / 10
The tank is as full as the score.
What to do about it
ZeroWater 12-Cup Ready-Pour
£40typical price
Households concerned about PFAS and heavy metals
Waterdrop 10UA Under Sink
£70typical price
High-volume under-sink filtration without RO complexity
BRITA Marella XL + MAXTRA PRO
£25typical price
Basic chlorine and taste improvement on a budget
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What's in a glass of CT6 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.
Ammonia came closest to a limit, at 25% of it. 4 of 4 substances used under a quarter of theirs.
- Ammonia25%
- Iron17%
- Nitrite14%
- Nitrate10%
- pH 7.95 pH
- Temperature 8.6 °C
- Conductivity 815 µS/cm
- Phosphate 0.185 mg/L
- Dissolved Oxygen 7.73 mg/L
All 9 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| pH | 7.95 pH | No legal limit | – |
| Iron | 0.034 mg/L | 0.2 mg/L | 17% |
| Temperature | 8.6 °C | No legal limit | – |
| Conductivity | 815 µS/cm | No legal limit | – |
| Ammonia | 0.123 mg/L | 0.5 mg/L | 25% |
| Nitrate | 4.82 mg/L | 50 mg/L | 10% |
| Nitrite | 0.0723 mg/L | 0.5 mg/L | 14% |
| Phosphate | 0.185 mg/L | No legal limit | – |
| Dissolved Oxygen | 7.73 mg/L | No legal limit | – |
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
CT6 in short
Tap water in CT6 (Canterbury) is supplied by Southern Water in the Canterbury Central zone and scores 8.4 out of 10, against an England and Wales average of 9.0. None of the 9 tested substances came close to a limit. The latest sample is from 18 September 2026.
- 4th cleanest of 5 areas tested in Canterbury1 area in Canterbury scored lower. The best is CT2 on 9.5.
- 0.6 points below the national average of 9Below the typical tested district in the UK, which is worth knowing before you choose a filter. Compare every area
- Nothing tested came within 40% of its legal limitThe highest was Ammonia at 25% of the 0.5 mg/L maximum. See every reading
Questions about CT6 water
Is CT6 tap water safe to drink?
Based on the latest tests, CT6 (Canterbury) water scores 8.4/10, which is safe. 0 of 9 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.
What contaminants are in CT6 water?
We tested 9 contaminants in CT6 water. None exceeded recommended safe levels.
Who supplies water in CT6?
CT6 (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 CT6?
CT6 water scored 8.4/10 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 CT6 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for CT6, 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 CT6?
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 CT6, which is treated before it reaches homes.
Keep reading
- Is UK Tap Water Safe?Everything you need to know about tap water safety in the UK
- Best Water Filters UKEvery filter type compared on what it actually removes
- How to Test Your Tap WaterFrom DIY strips to professional lab analysis
- Best Water Filter Jug UKBRITA vs ZeroWater vs the rest, tested against real data
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