Skip to main content
tapwater
England and Wales average 9.0

Tap water in BN15, AdurSafe to drink.

Supplied by Southern Water. 14,728 samples, 25 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

9.4 / 10

The tank is as full as the score.

What to do about it

ZeroWater 12-Cup Ready-Pour

ZeroWater 12-Cup Ready-Pour

£40typical price

Households concerned about PFAS and heavy metals

Check price at Amazon (opens in new tab)
Waterdrop 10UA Under Sink

Waterdrop 10UA Under Sink

£70typical price

High-volume under-sink filtration without RO complexity

Check price at Waterdrop (opens in new tab)
BRITA Marella XL + MAXTRA PRO

BRITA Marella XL + MAXTRA PRO

£25typical price

Basic chlorine and taste improvement on a budget

Check price at Amazon (opens in new tab)

We earn a commission if you buy through these links, at no extra cost to you. It never changes which product we put first. How we make money

What's in a glass of BN15 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 72% of it. 20 of 21 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: 0.000039 mg/L, <1% of the 0.005 mg/L limitAntimony<1%Selenium: 0.00043 mg/L, 1% of the 0.04 mg/L limitSelenium1%Copper: 0.0216 mg/L, 1% of the 2 mg/L limitCopper1%Bromate: 0.00013 mg/L, 1% of the 0.01 mg/L limitBromate1%Nitrite: 0.009 mg/L, 2% of the 0.5 mg/L limitNitrite2%Arsenic: 0.00018 mg/L, 2% of the 0.01 mg/L limitArsenic2%Boron: 0.0319 mg/L, 3% of the 1 mg/L limitBoron3%Turbidity: 0.13 NTU, 3% of the 4 NTU limitTurbidity3%Manganese: 0.00178 mg/L, 4% of the 0.05 mg/L limitManganese4%Nickel: 0.00084 mg/L, 4% of the 0.02 mg/L limitNickel4%Iron: 0.00928 mg/L, 5% of the 0.2 mg/L limitIron5%Lead: 0.00047 mg/L, 5% of the 0.01 mg/L limitLead5%Fluoride: 0.08 mg/L, 5% of the 1.5 mg/L limitFluoride5%Aluminium: 0.0113 mg/L, 6% of the 0.2 mg/L limitAluminium6%Mercury: 0.00006 mg/L, 6% of the 0.001 mg/L limitMercury6%Ammonia: 0.039 mg/L, 8% of the 0.5 mg/L limitAmmonia8%Trihalomethanes: 0.009 mg/L, 9% of the 0.1 mg/L limitTrihalomethanes9%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Nitrate: 35.8 mg/L, 72% of the 50 mg/L limitNitrate72%
  1. Nitrate72%
  2. Colour15%
  3. Trihalomethanes9%
  4. Ammonia8%
  5. Mercury6%
  6. Aluminium6%
  7. Fluoride5%
  8. Lead5%
  9. Iron5%
  10. Nickel4%
  11. Manganese4%
  12. Turbidity3%
  13. Boron3%
  14. Nitrite2%
  15. Arsenic2%
  16. Bromate1%
  17. Copper1%
  18. Selenium1%
  19. Antimony<1%
  20. Cadmium<1%
  21. Chromium<1%
  • pH 7.3 pH
  • Coliform Bacteria none found
  • E. coli none found
  • Conductivity 562 µS/cm
All 25 results as a table
SubstanceResultLegal limitShare of limit
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Turbidity0.13 NTU4 NTU
3%
pH7.3 pHNo legal limit–
Nitrate35.8 mg/L50 mg/L
72%
Aluminium0.0113 mg/L0.2 mg/L
6%
Iron0.00928 mg/L0.2 mg/L
5%
Manganese0.00178 mg/L0.05 mg/L
4%
Coliform Bacteria0 count/100mlMust be zeroNone found
E. coli0 count/100mlMust be zeroNone found
Lead0.00047 mg/L0.01 mg/L
5%
Conductivity562 µS/cmNo legal limit–
Ammonia0.039 mg/L0.5 mg/L
8%
Copper0.0216 mg/L2 mg/L
1%
Trihalomethanes0.009 mg/L0.1 mg/L
9%
Bromate0.00013 mg/L0.01 mg/L
1%
Nitrite0.009 mg/L0.5 mg/L
2%
Arsenic0.00018 mg/L0.01 mg/L
2%
Cadmium0.000031 mg/L0.005 mg/L
<1%
Chromium0.00019 mg/L0.05 mg/L
<1%
Nickel0.00084 mg/L0.02 mg/L
4%
Antimony0.000039 mg/L0.005 mg/L
<1%
Selenium0.00043 mg/L0.04 mg/L
1%
Boron0.0319 mg/L1 mg/L
3%
Fluoride0.08 mg/L1.5 mg/L
5%
Mercury0.00006 mg/L0.001 mg/L
6%
Outside your tap

Your river is the Teville Stream, rated bad

The Environment Agency rated the Teville Stream as bad for ecological health in its 2025 assessment, meaning the river is severely damaged, with most of the expected wildlife missing. It is held back by fish, dissolved oxygen and insects and other small river life. 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

BN15 in short

Tap water in BN15 (Adur) is supplied by Southern Water in the Adur Central zone and scores 9.4 out of 10, against an England and Wales average of 9.0. None of the 25 tested substances came close to a limit. The latest sample is from 27 April 2026.

  • The cleanest tap water of the 3 areas tested in AdurBN15 scores 9.4 out of 10, ahead of BN42 in second place on 9.2.
  • Nitrate is the reading closest to its limit, at 72% of the 50 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
  • Right on the national average of 9 out of 10Most of the country's tested districts land within half a point of BN15. Compare every area

Next door

BN439.2 out of 10BN429.2 out of 10

Questions about BN15 water

Is BN15 tap water safe to drink?

Based on the latest tests, BN15 (Adur) water scores 9.4/10, which is safe. 0 of 25 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.

What contaminants are in BN15 water?

We tested 25 contaminants in BN15 water. None exceeded recommended safe levels.

Who supplies water in BN15?

BN15 (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 BN15?

BN15 water scored 9.4/10 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 BN15 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for BN15, 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 BN15?

The Environment Agency rated the Teville Stream as bad for ecological health in its 2025 assessment, meaning the river is severely damaged, with most of the expected wildlife missing. It is held back by fish, dissolved oxygen and insects and other small river life. 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 BN15, 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 BN15

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

Get alerts for your area

We'll email you when water quality data changes for BN15.

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