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tapwater
England and Wales average 9.0

Tap water in BS23, North SomersetToo few tap tests to call it.

Supplied by Bristol Water. 8 substances, latest on 14 September 2026. These are river and groundwater samples near BS23, not tests of treated tap water, so treat the score as a rough guide.

See the filter we recommendSee everything that was tested

9.4 / 10

The tank is as full as the score.

What to do about it

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What's in a glass of BS23 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 12% of it. 3 of 3 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitNitrite: 0.0116 mg/L, 2% of the 0.5 mg/L limitNitrite2%Nitrate: 1.81 mg/L, 4% of the 50 mg/L limitNitrate4%Ammonia: 0.058 mg/L, 12% of the 0.5 mg/L limitAmmonia12%
  1. Ammonia12%
  2. Nitrate4%
  3. Nitrite2%
  • pH 7.68 pH
  • Temperature 6.8 °C
  • Conductivity 734 µS/cm
  • Phosphate 0.148 mg/L
  • Dissolved Oxygen 9.47 mg/L
All 8 results as a table
SubstanceResultLegal limitShare of limit
pH7.68 pHNo legal limit–
Temperature6.8 °CNo legal limit–
Conductivity734 µS/cmNo legal limit–
Ammonia0.058 mg/L0.5 mg/L
12%
Nitrate1.81 mg/L50 mg/L
4%
Nitrite0.0116 mg/L0.5 mg/L
2%
Phosphate0.148 mg/LNo legal limit–
Dissolved Oxygen9.47 mg/LNo legal limit–
Outside your tap

Your river is the Uphill Great Rhyne - source to conf R Axe Estuary, rated moderate

The Environment Agency rated the Uphill Great Rhyne - source to conf R Axe Estuary as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by dissolved oxygen, fish 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

BS23 in short

Tap water in BS23 (North Somerset) is supplied by Bristol Water in the North Somerset Central zone and scores 9.4 out of 10, against an England and Wales average of 9.0. None of the 8 tested substances came close to a limit. The latest sample is from 14 September 2026.

  • 3rd cleanest of 10 areas tested in BristolOnly 2 areas in Bristol scored higher. The best is BS40 on 9.6. Every area in Bristol
  • Nothing tested came within 40% of its legal limitThe highest was Ammonia at 12% of the 0.5 mg/L maximum. See every reading
  • Scores higher than 7 of 9 neighbouring districtsWater here is typical for the immediate area, which usually means the same treatment works and the same supply zone.

Next door

BS258.6 out of 10BS489.0 out of 10BS499.5 out of 10BS219.0 out of 10BS249.2 out of 10BS298.3 out of 10BS209.2 out of 10BS409.6 out of 10BS417.7 out of 10

Also nearby: BS22

Questions about BS23 water

Is BS23 tap water safe to drink?

Based on the latest tests, BS23 (North Somerset) water scores 9.4/10, which is safe. 0 of 8 tested contaminants exceeded recommended levels. Water is supplied by Bristol Water.

What contaminants are in BS23 water?

We tested 8 contaminants in BS23 water. None exceeded recommended safe levels.

Who supplies water in BS23?

BS23 (North Somerset) 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 BS23?

BS23 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 BS23 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for BS23, 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 BS23?

The Environment Agency rated the Uphill Great Rhyne - source to conf R Axe Estuary as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by dissolved oxygen, fish 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 BS23, which is treated before it reaches homes.

Keep reading

How to test your waterBest water filtersFilter shower headsWater testing kitsAll of BristolUK water rankingsWater hardness checkerWater hardness map

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