Tap water in TN22, WealdenToo few tap tests to call it.Slightly hard.
Supplied by Southern Water. 9 substances, latest on 13 May 2026. These are river and groundwater samples near TN22, not tests of treated tap water, so treat the score as a rough guide.
8.1 / 10
The tank is as full as the score. The specks are the minerals that make water hard.
What to do about it
ZeroWater 12-Cup Ready-Pour
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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 TN22 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 42% of it. 2 of 3 substances used under a quarter of theirs.
- Ammonia42%
- Nitrate7%
- Nitrite7%
- pH 7.79 pH
- Temperature 10.6 °C
- Conductivity 372 µS/cm
- Phosphate 0.023 mg/L
- Dissolved Oxygen 9.91 mg/L
- PFAS (total) 0.00097 µg/L
All 9 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| pH | 7.79 pH | No legal limit | – |
| Temperature | 10.6 °C | No legal limit | – |
| Conductivity | 372 µS/cm | No legal limit | – |
| Ammonia | 0.21 mg/L | 0.5 mg/L | 42% |
| Nitrate | 3.5 mg/L | 50 mg/L | 7% |
| Nitrite | 0.034 mg/L | 0.5 mg/L | 7% |
| Phosphate | 0.023 mg/L | No legal limit | – |
| Dissolved Oxygen | 9.91 mg/L | No legal limit | – |
| PFAS (total) | 0.00097 µg/L | No legal limit | – |
150mg of limescale minerals in every litre, typical for the TN area. TN22 has no reading of its own.
Middling hardness. Some scale, slowly
Below the point where a softener pays for itself. Descaling the kettle now and then is all most homes need.
Your river is the Tributary of River Uck north of Uckfield, rated bad
The Environment Agency rated the Tributary of River Uck north of Uckfield as bad for ecological health in its 2025 assessment, meaning the river is severely damaged, with most of the expected wildlife missing. It is held back by fish, insects and other small river life and dissolved oxygen. 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
TN22 in short
Tap water in TN22 (Wealden) is supplied by Southern Water in the Wealden Central zone and scores 8.1 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 13 May 2026.
- Ammonia is the reading closest to its limit, at 42% of the 0.5 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
- 5th cleanest of 7 areas tested in Wealden2 areas in Wealden scored lower. The best is TN21 on 9.6.
- 0.9 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
Questions about TN22 water
Is TN22 tap water safe to drink?
Based on the latest tests, TN22 (Wealden) water scores 8.1/10, which is safe. 0 of 9 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.
What contaminants are in TN22 water?
We tested 9 contaminants in TN22 water. None exceeded recommended safe levels. PFAS (forever chemicals) were also detected at 0.00097 µg/L in nearby environmental monitoring.
Who supplies water in TN22?
TN22 (Wealden) is supplied by Southern Water. You can view their full profile and compliance data on our supplier page.
Is TN22 water hard or soft?
No hardness reading has been published for TN22 itself. Across the TN postcode area the typical value is 150 mg/L CaCO3, which is classified as moderately hard. This is a moderate hardness level.
Should I use a water filter in TN22?
TN22 water scored 8.1/10 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 TN22 water?
Yes, PFAS (per- and polyfluoroalkyl substances) have been detected in TN22 at 0.00097 µg/L from environmental monitoring. The UK currently has no legal limit for PFAS in drinking water. Reverse osmosis and activated carbon filters can reduce PFAS levels.
How clean is the river near TN22?
The Environment Agency rated the Tributary of River Uck north of Uckfield as bad for ecological health in its 2025 assessment, meaning the river is severely damaged, with most of the expected wildlife missing. It is held back by fish, insects and other small river life and dissolved oxygen. 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 TN22, which is treated before it reaches homes.
Keep reading
- Best Filter for PFAS RemovalThe filters with independent certification to remove forever chemicals
- PFAS Forever ChemicalsWhat PFAS are and how to reduce your exposure at home
- 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
PFAS explainedHow to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map
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