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tapwater
England and Wales average 9.0

Tap water in GU29, ChichesterSafe to drink.Slightly hard.

Supplied by Southern Water. 11,176 samples, 22 substances, latest on 27 April 2026. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.5 / 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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Households concerned about PFAS and heavy metals

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High-volume under-sink filtration without RO complexity

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Basic chlorine and taste improvement on a budget

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What's in a glass of GU29 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 38% of it. 17 of 18 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitChromium: 0.00019 mg/L, <1% of the 0.05 mg/L limitChromium<1%Antimony: 0.000029 mg/L, <1% of the 0.005 mg/L limitAntimony<1%Bromate: 0.00014 mg/L, 1% of the 0.01 mg/L limitBromate1%Arsenic: 0.00014 mg/L, 1% of the 0.01 mg/L limitArsenic1%Selenium: 0.00062 mg/L, 2% of the 0.04 mg/L limitSelenium2%Nitrite: 0.009 mg/L, 2% of the 0.5 mg/L limitNitrite2%Cadmium: 0.000102 mg/L, 2% of the 0.005 mg/L limitCadmium2%Copper: 0.0489 mg/L, 2% of the 2 mg/L limitCopper2%Lead: 0.00031 mg/L, 3% of the 0.01 mg/L limitLead3%Turbidity: 0.13 NTU, 3% of the 4 NTU limitTurbidity3%Manganese: 0.00178 mg/L, 4% of the 0.05 mg/L limitManganese4%Nickel: 0.00082 mg/L, 4% of the 0.02 mg/L limitNickel4%Aluminium: 0.0113 mg/L, 6% of the 0.2 mg/L limitAluminium6%Trihalomethanes: 0.00605 mg/L, 6% of the 0.1 mg/L limitTrihalomethanes6%Ammonia: 0.039 mg/L, 8% of the 0.5 mg/L limitAmmonia8%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Iron: 0.0463 mg/L, 23% of the 0.2 mg/L limitIron23%Nitrate: 19.1 mg/L, 38% of the 50 mg/L limitNitrate38%
  1. Nitrate38%
  2. Iron23%
  3. Colour15%
  4. Ammonia8%
  5. Trihalomethanes6%
  6. Aluminium6%
  7. Nickel4%
  8. Manganese4%
  9. Turbidity3%
  10. Lead3%
  11. Copper2%
  12. Cadmium2%
  13. Nitrite2%
  14. Selenium2%
  15. Bromate1%
  16. Arsenic1%
  17. Antimony<1%
  18. Chromium<1%
  • pH 7.5 pH
  • Conductivity 429 µS/cm
  • Coliform Bacteria none found
  • E. coli none found
All 22 results as a table
SubstanceResultLegal limitShare of limit
pH7.5 pHNo legal limit–
Nitrate19.1 mg/L50 mg/L
38%
Iron0.0463 mg/L0.2 mg/L
23%
Lead0.00031 mg/L0.01 mg/L
3%
Conductivity429 µS/cmNo legal limit–
Coliform Bacteria0 count/100mlMust be zeroNone found
E. coli0 count/100mlMust be zeroNone found
Aluminium0.0113 mg/L0.2 mg/L
6%
Manganese0.00178 mg/L0.05 mg/L
4%
Cadmium0.000102 mg/L0.005 mg/L
2%
Chromium0.00019 mg/L0.05 mg/L
<1%
Nickel0.00082 mg/L0.02 mg/L
4%
Antimony0.000029 mg/L0.005 mg/L
<1%
Selenium0.00062 mg/L0.04 mg/L
2%
Trihalomethanes0.00605 mg/L0.1 mg/L
6%
Bromate0.00014 mg/L0.01 mg/L
1%
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Turbidity0.13 NTU4 NTU
3%
Nitrite0.009 mg/L0.5 mg/L
2%
Copper0.0489 mg/L2 mg/L
2%
Arsenic0.00014 mg/L0.01 mg/L
1%
Ammonia0.039 mg/L0.5 mg/L
8%

154mg of limescale minerals in every litre, typical for the GU area. GU29 has no reading of its own.

Middling hardness. Some scale, slowly

Below the point where a softener pays for itself. Descaling the kettle now and then is all most homes need.

Soft400 mg/L
Outside your tap

Your river is the Western Rother, rated moderate

The Environment Agency rated the Western Rother 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

GU29 in short

Tap water in GU29 (Chichester) is supplied by Southern Water in the Chichester Central zone and scores 9.5 out of 10, against an England and Wales average of 9.0. None of the 22 tested substances came close to a limit. The latest sample is from 27 April 2026.

  • The cleanest tap water of the 8 areas tested in ChichesterGU29 scores 9.5 out of 10, ahead of PO18 in second place on 9.5.
  • Nothing tested came within 40% of its legal limitThe highest was Nitrate at 38% of the 50 mg/L maximum. See every reading
  • Moderately hard water at 154 mg/LSome scale over time across the GU postcode area, but not enough to justify a softener for most homes. How hardness is measured

Next door

GU289.4 out of 10 · 154 mg/LGU319.3 out of 10 · 154 mg/LPO109.1 out of 10PO189.5 out of 10PO209.0 out of 10PO199.1 out of 10RH149.3 out of 10 · 138 mg/L

Questions about GU29 water

Is GU29 tap water safe to drink?

Based on the latest tests, GU29 (Chichester) water scores 9.5/10, which is safe. 0 of 22 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.

What contaminants are in GU29 water?

We tested 22 contaminants in GU29 water. None exceeded recommended safe levels.

Who supplies water in GU29?

GU29 (Chichester) is supplied by Southern Water. You can view their full profile and compliance data on our supplier page.

Is GU29 water hard or soft?

No hardness reading has been published for GU29 itself. Across the GU postcode area the typical value is 154 mg/L CaCO3, which is classified as moderately hard. This is a moderate hardness level.

Should I use a water filter in GU29?

GU29 water scored 9.5/10 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 GU29 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for GU29, 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 GU29?

The Environment Agency rated the Western Rother 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 GU29, 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

River and groundwater readings near GU29

Environment Agency samples from rivers, groundwater and reservoirs nearby. Not your tap water. For scale they are shown against drinking water limits; rivers are judged against much stricter environmental standards, and on those every river in England fails for chemicals.

SubstanceReadingDrinking water limit
pH7.49 pHNone
Temperature14.5 °CNone
Conductivity379 µS/cmNone
Ammonia0.11 mg/L0.5 mg/L
Nitrate4.1 mg/L50 mg/L
Nitrite0.034 mg/L0.5 mg/L
Phosphate0.1 mg/LNone
Dissolved Oxygen9.32 mg/LNone
Copper0.00118 mg/L2 mg/L
Zinc0.00575 mg/LNone

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We'll email you when water quality data changes for GU29.

Source: Southern Water test results, published through the Stream Water Data Portal; rivers and PFAS from the Environment Agency. Page updated . How we score · Where the data comes from