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tapwater
England and Wales average 9.0

Tap water in GU26, East HampshireToo few tap tests to call it.Moderately soft.

Supplied by Southern Water. 8 substances, latest on 10 September 2026. These are river and groundwater samples near GU26, 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. The specks are the minerals that make water hard.

What to do about it

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What's in a glass of GU26 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.

0%25%50%75%limitLegal limitNitrite: 0.019 mg/L, 4% of the 0.5 mg/L limitNitrite4%Ammonia: 0.034 mg/L, 7% of the 0.5 mg/L limitAmmonia7%Nitrate: 6.2 mg/L, 12% of the 50 mg/L limitNitrate12%
  1. Nitrate12%
  2. Ammonia7%
  3. Nitrite4%
  • pH 7.65 pH
  • Temperature 14.4 °C
  • Conductivity 377 µS/cm
  • Phosphate 0.25 mg/L
  • Dissolved Oxygen 9.01 mg/L
All 8 results as a table
SubstanceResultLegal limitShare of limit
pH7.65 pHNo legal limit–
Temperature14.4 °CNo legal limit–
Conductivity377 µS/cmNo legal limit–
Nitrate6.2 mg/L50 mg/L
12%
Nitrite0.019 mg/L0.5 mg/L
4%
Phosphate0.25 mg/LNo legal limit–
Dissolved Oxygen9.01 mg/LNo legal limit–
Ammonia0.034 mg/L0.5 mg/L
7%

88mg of limescale minerals in every litre

Soft water. Kind to kettles, boilers and skin

You will not need a softener here, and you will use less soap and detergent than most of England.

Soft400 mg/L
Outside your tap

Your river is the South Wey (River Slea confluence to Tilford), rated moderate

The Environment Agency rated the South Wey (River Slea confluence to Tilford) 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

GU26 in short

Tap water in GU26 (East Hampshire) is supplied by Southern Water in the East Hampshire 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 10 September 2026.

  • 2nd cleanest of 7 areas tested in East HampshireOnly 1 area in East Hampshire scored higher. The best is GU33 on 9.3.
  • Nothing tested came within 40% of its legal limitThe highest was Nitrate at 12% of the 50 mg/L maximum. See every reading
  • Moderately soft water at 88 mg/LLittle limescale to speak of in GU26. A softener would be money wasted. How hardness is measured

Next door

GU309.2 out of 10 · 154 mg/LPO88.8 out of 10GU339.3 out of 10 · 154 mg/LGU329.0 out of 10 · 154 mg/LGU347.0 out of 10 · 154 mg/LGU358.0 out of 10 · 154 mg/LGU278.6 out of 10 · 225 mg/L

Questions about GU26 water

Is GU26 tap water safe to drink?

Based on the latest tests, GU26 (East Hampshire) water scores 9.2/10, which is safe. 0 of 8 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.

What contaminants are in GU26 water?

We tested 8 contaminants in GU26 water. None exceeded recommended safe levels.

Who supplies water in GU26?

GU26 (East Hampshire) is supplied by Southern Water. You can view their full profile and compliance data on our supplier page.

Is GU26 water hard or soft?

Water in GU26 (East Hampshire) has a hardness of 88 mg/L CaCO3, which is classified as moderately soft. This is a moderate hardness level.

Should I use a water filter in GU26?

GU26 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 GU26 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for GU26, 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 GU26?

The Environment Agency rated the South Wey (River Slea confluence to Tilford) 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 GU26, which is treated before it reaches homes.

Keep reading

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

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