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tapwater
England and Wales average 9.0

Tap water in BS30, South GloucestershireToo few tap tests to call it.

Supplied by Bristol Water. 8 substances, latest on 12 May 2026. These are river and groundwater samples near BS30, not tests of treated tap water, so treat the score as a rough guide.

See the filter we recommendSee everything that was tested

9.3 / 10

The tank is as full as the score.

What to do about it

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What's in a glass of BS30 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 7% of it. 3 of 3 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitNitrite: 0.035 mg/L, 7% of the 0.5 mg/L limitNitrite7%Nitrate: 3.6 mg/L, 7% of the 50 mg/L limitNitrate7%Ammonia: 0.036 mg/L, 7% of the 0.5 mg/L limitAmmonia7%
  1. Nitrate7%
  2. Ammonia7%
  3. Nitrite7%
  • pH 8.23 pH
  • Temperature 11 °C
  • Conductivity 621 µS/cm
  • Phosphate 0.15 mg/L
  • Dissolved Oxygen 10.8 mg/L
All 8 results as a table
SubstanceResultLegal limitShare of limit
pH8.23 pHNo legal limit–
Temperature11 °CNo legal limit–
Conductivity621 µS/cmNo legal limit–
Ammonia0.036 mg/L0.5 mg/L
7%
Nitrate3.6 mg/L50 mg/L
7%
Nitrite0.035 mg/L0.5 mg/L
7%
Phosphate0.15 mg/LNo legal limit–
Dissolved Oxygen10.8 mg/LNo legal limit–
Outside your tap

Your river is the Siston Bk - source to conf R Avon (Brist), rated moderate

The Environment Agency rated the Siston Bk - 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 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

Within 10 km

167

forever-chemical detections in nearby rivers and groundwater

At 5 sites. The highest was PFOS at 0.023 µg/L, at Eastville Lake Inlet, 6.7 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

BS30 in short

Tap water in BS30 (South Gloucestershire) is supplied by Bristol Water in the South Gloucestershire Central zone and scores 9.3 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 12 May 2026.

  • 2nd cleanest of 9 areas tested in South GloucestershireOnly 1 area in South Gloucestershire scored higher. The best is BS37 on 9.6.
  • PFAS found at 5 monitoring sites within 10 kmThose are river and groundwater samples, not tap water. The highest was PFOS about 6.7 km away. What was measured
  • Nothing tested came within 40% of its legal limitThe highest was Nitrate at 7% of the 50 mg/L maximum. See every reading

Next door

BS329.1 out of 10BS349.1 out of 10BS359.1 out of 10BS169.2 out of 10BS159.2 out of 10BS379.6 out of 10BS369.3 out of 10GL128.8 out of 10 · 258 mg/L

Questions about BS30 water

Is BS30 tap water safe to drink?

Based on the latest tests, BS30 (South Gloucestershire) water scores 9.3/10, which is safe. 0 of 8 tested contaminants exceeded recommended levels. Water is supplied by Bristol Water.

What contaminants are in BS30 water?

We tested 8 contaminants in BS30 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 BS30?

BS30 (South Gloucestershire) 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 BS30?

BS30 water scored 9.3/10 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 BS30 water?

The tap-water tests we hold for BS30 do not include a PFAS result. Environment Agency monitoring found PFAS in 167 river and groundwater samples from 5 sites within 10 km of BS30, the highest being PFOS at 0.023 µg/L about 6.7 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 BS30?

The Environment Agency rated the Siston Bk - 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 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 BS30, which is treated before it reaches homes.

Keep reading

PFAS explainedHow to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map

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