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tapwater
England and Wales average 9.0

Tap water in BN43, AdurSafe to drink.

Supplied by Southern Water. 14,930 samples, 22 substances, latest on 30 April 2026. Everything is inside the legal limit. One result, nitrate, sits close to the line.

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

Waterdrop G3P600 Reverse Osmosis

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£550typical price

Removes nitrate, the result that stood out in BN43.

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Osmio PRO-III Ultimate Whole House

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Removes nitrate, the result that stood out in BN43.

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ZeroWater 12-Cup Ready-Pour

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Removes nitrate, the result that stood out in BN43.

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What's in a glass of BN43 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 86% 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%Cadmium: 0.000031 mg/L, <1% of the 0.005 mg/L limitCadmium<1%Antimony: 0.000046 mg/L, <1% of the 0.005 mg/L limitAntimony<1%Selenium: 0.00049 mg/L, 1% of the 0.04 mg/L limitSelenium1%Bromate: 0.00013 mg/L, 1% of the 0.01 mg/L limitBromate1%Arsenic: 0.00014 mg/L, 1% of the 0.01 mg/L limitArsenic1%Lead: 0.00015 mg/L, 1% of the 0.01 mg/L limitLead1%Nitrite: 0.009 mg/L, 2% of the 0.5 mg/L limitNitrite2%Copper: 0.0383 mg/L, 2% of the 2 mg/L limitCopper2%Turbidity: 0.13 NTU, 3% of the 4 NTU limitTurbidity3%Manganese: 0.00178 mg/L, 4% of the 0.05 mg/L limitManganese4%Iron: 0.00928 mg/L, 5% of the 0.2 mg/L limitIron5%Ammonia: 0.025 mg/L, 5% of the 0.5 mg/L limitAmmonia5%Aluminium: 0.0113 mg/L, 6% of the 0.2 mg/L limitAluminium6%Nickel: 0.00148 mg/L, 7% of the 0.02 mg/L limitNickel7%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Trihalomethanes: 0.0215 mg/L, 22% of the 0.1 mg/L limitTrihalomethanes22%Nitrate: 43.2 mg/L, 86% of the 50 mg/L limitNitrate86%
  1. Nitrate86%
  2. Trihalomethanes22%
  3. Colour15%
  4. Nickel7%
  5. Aluminium6%
  6. Ammonia5%
  7. Iron5%
  8. Manganese4%
  9. Turbidity3%
  10. Copper2%
  11. Nitrite2%
  12. Lead1%
  13. Arsenic1%
  14. Bromate1%
  15. Selenium1%
  16. Antimony<1%
  17. Cadmium<1%
  18. Chromium<1%
  • pH 7.5 pH
  • Coliform Bacteria none found
  • E. coli none found
  • Conductivity 498 µS/cm
All 22 results as a table
SubstanceResultLegal limitShare of limit
Nitrate43.2 mg/L50 mg/L
86%
Iron0.00928 mg/L0.2 mg/L
5%
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Turbidity0.13 NTU4 NTU
3%
pH7.5 pHNo legal limit–
Ammonia0.025 mg/L0.5 mg/L
5%
Aluminium0.0113 mg/L0.2 mg/L
6%
Manganese0.00178 mg/L0.05 mg/L
4%
Copper0.0383 mg/L2 mg/L
2%
Lead0.00015 mg/L0.01 mg/L
1%
Coliform Bacteria0 count/100mlMust be zeroNone found
E. coli0 count/100mlMust be zeroNone found
Conductivity498 µS/cmNo legal limit–
Nitrite0.009 mg/L0.5 mg/L
2%
Arsenic0.00014 mg/L0.01 mg/L
1%
Cadmium0.000031 mg/L0.005 mg/L
<1%
Chromium0.00019 mg/L0.05 mg/L
<1%
Nickel0.00148 mg/L0.02 mg/L
7%
Antimony0.000046 mg/L0.005 mg/L
<1%
Selenium0.00049 mg/L0.04 mg/L
1%
Trihalomethanes0.0215 mg/L0.1 mg/L
22%
Bromate0.00013 mg/L0.01 mg/L
1%
Outside your tap

Your estuary is the Adur, rated moderate

The Environment Agency rated the Adur as moderate for ecological health in its 2025 assessment, meaning the estuary is noticeably changed by pollution or engineering. It is held back by fish, nitrogen and seagrass and saltmarsh. 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

BN43 in short

Tap water in BN43 (Adur) is supplied by Southern Water in the Adur Central zone and scores 9.2 out of 10, against an England and Wales average of 9.0. 1 of 22 tested substances was close to or over a limit. The latest sample is from 30 April 2026.

  • Nitrate is within its legal limit but flagged, at 86% of the 50 mg/L maximumAnything over three quarters of a limit is flagged here as worth watching. It has not gone over. See every reading
  • The lowest score of the 3 areas tested in AdurBN43 scores 9.2 out of 10. The best in Adur, BN15, scores 9.4.
  • Scores higher than 0 of 3 neighbouring districtsWater here is typical for the immediate area, which usually means the same treatment works and the same supply zone.

Next door

BN159.4 out of 10BN429.2 out of 10BN419.2 out of 10

Questions about BN43 water

Is BN43 tap water safe to drink?

Based on the latest tests, BN43 (Adur) water scores 9.2/10, which is safe. 1 of 22 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.

What contaminants are in BN43 water?

We tested 22 contaminants in BN43 water. 1 were flagged, including Nitrate.

Who supplies water in BN43?

BN43 (Adur) is supplied by Southern Water. You can view their full profile and compliance data on our supplier page.

Should I use a water filter in BN43?

With 1 contaminant above recommended levels in BN43, a water filter could help. A filter jug or under-sink filter can reduce most common contaminants. See our filter recommendations for your area.

Are there PFAS forever chemicals in BN43 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for BN43, 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 estuary near BN43?

The Environment Agency rated the Adur as moderate for ecological health in its 2025 assessment, meaning the estuary is noticeably changed by pollution or engineering. It is held back by fish, nitrogen and seagrass and saltmarsh. 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 estuary, not of tap water in BN43, which is treated before it reaches homes.

Keep reading

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

River and groundwater readings near BN43

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
pH7.7 pHNone
Temperature18.1 °CNone
Conductivity560 µS/cmNone
Nitrate0.39 mg/L50 mg/L
Phosphate0.057 mg/LNone
Dissolved Oxygen5.89 mg/LNone
Ammonia0.039 mg/L0.5 mg/L
Nitrite0.018 mg/L0.5 mg/L
Nickel0.0021 mg/L0.02 mg/L

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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