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tapwater
England and Wales average 9.0

Tap water in BS20, North SomersetToo few tap tests to call it.

Supplied by Bristol Water. 8 substances, latest on 13 June 2019. These are river and groundwater samples near BS20, not tests of treated tap water, so treat the score as a rough guide.

See the filter we recommendSee everything that was tested

9.2 / 10

The tank is as full as the score.

What to do about it

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Basic chlorine and taste improvement on a budget

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What's in a glass of BS20 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: 0.026 mg/L, 5% of the 0.5 mg/L limitNitrite5%Nitrate: 3.2 mg/L, 6% of the 50 mg/L limitNitrate6%Ammonia: 0.058 mg/L, 12% of the 0.5 mg/L limitAmmonia12%
  1. Ammonia12%
  2. Nitrate6%
  3. Nitrite5%
  • pH 7.76 pH
  • Temperature 13.2 °C
  • Conductivity 588 µS/cm
  • Phosphate 0.089 mg/L
  • Dissolved Oxygen 8.69 mg/L
All 8 results as a table
SubstanceResultLegal limitShare of limit
pH7.76 pHNo legal limit–
Temperature13.2 °CNo legal limit–
Conductivity588 µS/cmNo legal limit–
Ammonia0.058 mg/L0.5 mg/L
12%
Nitrate3.2 mg/L50 mg/L
6%
Nitrite0.026 mg/L0.5 mg/L
5%
Phosphate0.089 mg/LNo legal limit–
Dissolved Oxygen8.69 mg/LNo legal limit–
Outside your tap

Your river is the Portbury Ditch - source to conf R Severn Estuary, rated moderate

The Environment Agency rated the Portbury Ditch - source to conf R Severn Estuary as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. 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

Within 10 km

24

forever-chemical detections in nearby rivers and groundwater

At 1 site. The highest was PFPeA at 0.019 µg/L, at Wraxall Service Station Borehole, 4.7 km away, in April 2024. These are river and borehole samples, not tests of your tap water.

Every PFAS sample around Bristol · Which filters remove PFAS · PFAS explained

BS20 in short

Tap water in BS20 (North Somerset) is supplied by Bristol Water in the North Somerset Central zone and scores 9.2 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 13 June 2019.

  • The newest sample here is from June 2019That is over 7 years old, so treat this page as a record of past results rather than today's tap water.
  • 4th cleanest of 10 areas tested in BristolOnly 3 areas in Bristol scored higher. The best is BS40 on 9.6. Every area in Bristol
  • PFAS found at 1 monitoring site within 10 kmThose are river and groundwater samples, not tap water. The highest was PFPeA about 4.7 km away. What was measured

Next door

BS258.6 out of 10BS499.5 out of 10BS219.0 out of 10BS239.4 out of 10BS298.3 out of 10BS409.6 out of 10BS249.2 out of 10BS417.7 out of 10BS489.0 out of 10

Also nearby: BS22

Questions about BS20 water

Is BS20 tap water safe to drink?

Based on the latest tests, BS20 (North Somerset) water scores 9.2/10, which is safe. 0 of 8 tested contaminants exceeded recommended levels. Water is supplied by Bristol Water.

What contaminants are in BS20 water?

We tested 8 contaminants in BS20 water. None exceeded recommended safe levels. PFAS (forever chemicals) were also measured in rivers and groundwater within 10 km, though not in the tap-water tests themselves.

Who supplies water in BS20?

BS20 (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 BS20?

BS20 water scored 9.2/10 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 BS20 water?

The tap-water tests we hold for BS20 do not include a PFAS result. Environment Agency monitoring found PFAS in 24 river and groundwater samples from 1 sites within 10 km of BS20, the highest being PFPeA at 0.019 µg/L about 4.7 km away. These are environmental samples, not tests of tap water. The UK currently has no legal limit for PFAS in drinking water; the Drinking Water Inspectorate uses a 0.1 µg/L guideline for individual compounds. Reverse osmosis filters can reduce PFAS levels.

How clean is the river near BS20?

The Environment Agency rated the Portbury Ditch - source to conf R Severn Estuary as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. 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 BS20, which is treated before it reaches homes.

Keep reading

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

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