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tapwater
England and Wales average 9.0

Tap water in BN6, Mid SussexSafe to drink.

Supplied by Southern Water. 1,778 samples, 22 substances, latest on 1 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

9.0 / 10

The tank is as full as the score.

What to do about it

Waterdrop G3P600 Reverse Osmosis

Waterdrop G3P600 Reverse Osmosis

£550typical price

Removes nitrate, the result that stood out in BN6.

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Osmio PRO-III Ultimate Whole House

£499typical price

Removes nitrate, the result that stood out in BN6.

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ZeroWater 12-Cup Ready-Pour

ZeroWater 12-Cup Ready-Pour

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Removes nitrate, the result that stood out in BN6.

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What's in a glass of BN6 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 76% of it. 16 of 18 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitChromium: 0.00018 mg/L, <1% of the 0.05 mg/L limitChromium<1%Cadmium: 0.00003 mg/L, <1% of the 0.005 mg/L limitCadmium<1%Nitrite: 0.004 mg/L, <1% of the 0.5 mg/L limitNitrite<1%Lead: 0.00009 mg/L, <1% of the 0.01 mg/L limitLead<1%Selenium: 0.00036 mg/L, <1% of the 0.04 mg/L limitSelenium<1%Copper: 0.0317 mg/L, 2% of the 2 mg/L limitCopper2%Antimony: 0.00008 mg/L, 2% of the 0.005 mg/L limitAntimony2%Turbidity: 0.13 NTU, 3% of the 4 NTU limitTurbidity3%Manganese: 0.00178 mg/L, 4% of the 0.05 mg/L limitManganese4%Arsenic: 0.00039 mg/L, 4% of the 0.01 mg/L limitArsenic4%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%Bromate: 0.00127 mg/L, 13% of the 0.01 mg/L limitBromate13%Colour: 3 mg/L Pt/Co, 15% of the 20 mg/L Pt/Co limitColour15%Nickel: 0.00337 mg/L, 17% of the 0.02 mg/L limitNickel17%Trihalomethanes: 0.0475 mg/L, 47% of the 0.1 mg/L limitTrihalomethanes47%Nitrate: 38.2 mg/L, 76% of the 50 mg/L limitNitrate76%
  1. Nitrate76%
  2. Trihalomethanes47%
  3. Nickel17%
  4. Colour15%
  5. Bromate13%
  6. Aluminium6%
  7. Ammonia5%
  8. Iron5%
  9. Arsenic4%
  10. Manganese4%
  11. Turbidity3%
  12. Antimony2%
  13. Copper2%
  14. Lead<1%
  15. Selenium<1%
  16. Nitrite<1%
  17. Cadmium<1%
  18. Chromium<1%
  • pH 7.6 pH
  • Coliform Bacteria none found
  • E. coli none found
  • Conductivity 518 µS/cm
All 22 results as a table
SubstanceResultLegal limitShare of limit
Nitrate38.2 mg/L50 mg/L
76%
Colour3 mg/L Pt/Co20 mg/L Pt/Co
15%
Turbidity0.13 NTU4 NTU
3%
pH7.6 pHNo legal limit–
Lead0.00009 mg/L0.01 mg/L
<1%
Coliform Bacteria0 count/100mlMust be zeroNone found
E. coli0 count/100mlMust be zeroNone found
Iron0.00928 mg/L0.2 mg/L
5%
Ammonia0.025 mg/L0.5 mg/L
5%
Aluminium0.0113 mg/L0.2 mg/L
6%
Manganese0.00178 mg/L0.05 mg/L
4%
Copper0.0317 mg/L2 mg/L
2%
Conductivity518 µS/cmNo legal limit–
Nitrite0.004 mg/L0.5 mg/L
<1%
Arsenic0.00039 mg/L0.01 mg/L
4%
Cadmium0.00003 mg/L0.005 mg/L
<1%
Chromium0.00018 mg/L0.05 mg/L
<1%
Nickel0.00337 mg/L0.02 mg/L
17%
Antimony0.00008 mg/L0.005 mg/L
2%
Selenium0.00036 mg/L0.04 mg/L
<1%
Trihalomethanes0.0475 mg/L0.1 mg/L
47%
Bromate0.00127 mg/L0.01 mg/L
13%
Outside your tap

Your river is the Herrings Stream, rated poor

The Environment Agency rated the Herrings Stream as poor for ecological health in its 2025 assessment, meaning the river is badly affected, with much of the expected wildlife missing. It is held back by water plants and algae and 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

54

forever-chemical detections in nearby rivers and groundwater

At 1 site. The highest was PFBS at 0.057 µg/L, at RSN0537 Adur East Churchill Way Burgesshill, 3.6 km away, in July 2026. These are river and borehole samples, not tests of your tap water.

Every PFAS sample around Brighton · Which filters remove PFAS · PFAS explained

BN6 in short

Tap water in BN6 (Mid Sussex) is supplied by Southern Water in the Mid Sussex Central zone and scores 9.0 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 1 April 2026.

  • Nitrate is within its legal limit but flagged, at 76% 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
  • 4th cleanest of 5 areas tested in Mid Sussex1 area in Mid Sussex scored lower. The best is BN45 on 9.4.
  • PFAS found at 1 monitoring site within 10 kmThose are river and groundwater samples, not tap water. The highest was PFBS about 3.6 km away. What was measured

Next door

BN459.4 out of 10RH159.4 out of 10 · 148 mg/LRH167.0 out of 10 · 148 mg/LRH179.3 out of 10 · 148 mg/L

Also nearby: RH19

Questions about BN6 water

Is BN6 tap water safe to drink?

Based on the latest tests, BN6 (Mid Sussex) water scores 9/10, which is safe. 1 of 22 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.

What contaminants are in BN6 water?

We tested 22 contaminants in BN6 water. 1 were flagged, including Nitrate. 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 BN6?

BN6 (Mid Sussex) 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 BN6?

With 1 contaminant above recommended levels in BN6, a water filter could help. A reverse osmosis or activated carbon filter is recommended for PFAS removal. See our filter recommendations for your area.

Are there PFAS forever chemicals in BN6 water?

The tap-water tests we hold for BN6 do not include a PFAS result. Environment Agency monitoring found PFAS in 54 river and groundwater samples from 1 sites within 10 km of BN6, the highest being PFBS at 0.057 µg/L about 3.6 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 BN6?

The Environment Agency rated the Herrings Stream as poor for ecological health in its 2025 assessment, meaning the river is badly affected, with much of the expected wildlife missing. It is held back by water plants and algae and 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 BN6, which is treated before it reaches homes.

Keep reading

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

River and groundwater readings near BN6

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
Manganese0.097 mg/L0.05 mg/L
Copper0.00012 mg/L2 mg/L
Zinc0.0013 mg/LNone
Iron0.049 mg/L0.2 mg/L
Dissolved Oxygen4.14 mg/LNone
pH7.69 pHNone
Temperature14.9 °CNone
Conductivity553 µS/cmNone
Ammonia0.25 mg/L0.5 mg/L
Nitrate0.61 mg/L50 mg/L
Nitrite0.047 mg/L0.5 mg/L
PFAS (total)0.0054 µg/LNone

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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