Tap water in BS10, Bristol, City ofToo few tap tests to call it.
Supplied by Bristol Water. 9 substances, latest on 2 December 2025. These are river and groundwater samples near BS10, not tests of treated tap water, so treat the score as a rough guide.
9.1 / 10
The tank is as full as the score.
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 BS10 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 12% of it. 3 of 3 substances used under a quarter of theirs.
- Nitrate12%
- Ammonia10%
- Nitrite4%
- pH 7.92 pH
- Temperature 10.7 °C
- Conductivity 613 µS/cm
- Phosphate 0.16 mg/L
- Dissolved Oxygen 10.6 mg/L
- PFAS (total) 0.0076 µg/L
All 9 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| pH | 7.92 pH | No legal limit | – |
| Temperature | 10.7 °C | No legal limit | – |
| Conductivity | 613 µS/cm | No legal limit | – |
| Ammonia | 0.049 mg/L | 0.5 mg/L | 10% |
| Nitrate | 5.9 mg/L | 50 mg/L | 12% |
| Nitrite | 0.021 mg/L | 0.5 mg/L | 4% |
| Phosphate | 0.16 mg/L | No legal limit | – |
| Dissolved Oxygen | 10.6 mg/L | No legal limit | – |
| PFAS (total) | 0.0076 µg/L | No legal limit | – |
Your river is the Trym - source to conf R Avon (Brist), rated moderate
The Environment Agency rated the Trym - source to conf R Avon (Brist) as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by fish, insects and other small river life and phosphate. 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
86
forever-chemical detections in nearby rivers and groundwater
At 3 sites. The highest was PFOS at 0.023 µg/L, at Eastville Lake Inlet, 5.2 km away, in July 2023. These are river and borehole samples, not tests of your tap water.
Every PFAS sample around Bristol · Which filters remove PFAS · PFAS explained
BS10 in short
Tap water in BS10 (Bristol, City of) is supplied by Bristol Water in the Bristol, City of Central zone and scores 9.1 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 2 December 2025.
- The cleanest tap water of the 13 areas tested in BristolBS10 scores 9.1 out of 10, ahead of BS14 in second place on 8.9. Every area in Bristol
- Scores higher than all 10 neighbouring districtsThe nearest rival is BS5 on 8.9, against 9.1 here. Compare with BS5
- Nothing tested came within 40% of its legal limitThe highest was Nitrate at 12% of the 50 mg/L maximum. See every reading
Questions about BS10 water
Is BS10 tap water safe to drink?
Based on the latest tests, BS10 (Bristol, City of) water scores 9.1/10, which is safe. 0 of 9 tested contaminants exceeded recommended levels. Water is supplied by Bristol Water.
What contaminants are in BS10 water?
We tested 9 contaminants in BS10 water. None exceeded recommended safe levels. PFAS (forever chemicals) were also detected at 0.0076 µg/L in nearby environmental monitoring.
Who supplies water in BS10?
BS10 (Bristol, City of) is supplied by Bristol Water. You can view their full profile and compliance data on our supplier page.
Should I use a water filter in BS10?
BS10 water scored 9.1/10 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 BS10 water?
Yes, PFAS (per- and polyfluoroalkyl substances) have been detected in BS10 at 0.0076 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 BS10?
The Environment Agency rated the Trym - source to conf R Avon (Brist) as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by fish, insects and other small river life and phosphate. 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 BS10, 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 kitsAll of BristolUK water rankingsWater hardness checkerWater hardness map
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