Tap water in CT11, ThanetSafe to drink.
Supplied by Southern Water. 14,121 samples, 21 substances, latest on 29 April 2026. Everything is inside the legal limit, and nothing comes close to it.
9.4 / 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 CT11 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 62% of it. 16 of 17 substances used under a quarter of theirs.
- Nitrate62%
- Colour15%
- Trihalomethanes8%
- Ammonia8%
- Aluminium6%
- Nickel5%
- Iron5%
- Manganese4%
- Turbidity3%
- Copper3%
- Selenium2%
- Arsenic2%
- Nitrite2%
- Antimony1%
- Lead<1%
- Cadmium<1%
- Chromium<1%
- Coliform Bacteria none found
- E. coli none found
- pH 7.4 pH
- Conductivity 687 µS/cm
All 21 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Coliform Bacteria | 0 count/100ml | Must be zero | None found |
| E. coli | 0 count/100ml | Must be zero | None found |
| pH | 7.4 pH | No legal limit | – |
| Lead | 0.00009 mg/L | 0.01 mg/L | <1% |
| Conductivity | 687 µS/cm | No legal limit | – |
| Nitrate | 31.1 mg/L | 50 mg/L | 62% |
| Aluminium | 0.0113 mg/L | 0.2 mg/L | 6% |
| Iron | 0.00928 mg/L | 0.2 mg/L | 5% |
| Manganese | 0.00178 mg/L | 0.05 mg/L | 4% |
| Copper | 0.0601 mg/L | 2 mg/L | 3% |
| Colour | 3 mg/L Pt/Co | 20 mg/L Pt/Co | 15% |
| Turbidity | 0.13 NTU | 4 NTU | 3% |
| Ammonia | 0.039 mg/L | 0.5 mg/L | 8% |
| Nitrite | 0.009 mg/L | 0.5 mg/L | 2% |
| Antimony | 0.000051 mg/L | 0.005 mg/L | 1% |
| Selenium | 0.0008 mg/L | 0.04 mg/L | 2% |
| Trihalomethanes | 0.00841 mg/L | 0.1 mg/L | 8% |
| Arsenic | 0.00019 mg/L | 0.01 mg/L | 2% |
| Cadmium | 0.000031 mg/L | 0.005 mg/L | <1% |
| Chromium | 0.00022 mg/L | 0.05 mg/L | <1% |
| Nickel | 0.00105 mg/L | 0.02 mg/L | 5% |
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
CT11 in short
Tap water in CT11 (Thanet) is supplied by Southern Water in the Thanet Central zone and scores 9.4 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 cleanest tap water of the 6 areas tested in ThanetCT11 scores 9.4 out of 10, ahead of CT12 in second place on 9.4.
- Nitrate is the reading closest to its limit, at 62% 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 5 neighbouring districtsWater here is typical for the immediate area, which usually means the same treatment works and the same supply zone.
Questions about CT11 water
Is CT11 tap water safe to drink?
Based on the latest tests, CT11 (Thanet) water scores 9.4/10, which is safe. 0 of 21 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.
What contaminants are in CT11 water?
We tested 21 contaminants in CT11 water. None exceeded recommended safe levels.
Who supplies water in CT11?
CT11 (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 CT11?
CT11 water scored 9.4/10 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 CT11 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for CT11, 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 CT11?
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 CT11, which is treated before it reaches homes.
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River and groundwater readings near CT11
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.
Get alerts for your area
We'll email you when water quality data changes for CT11.