Skip to main content
tapwater
England and Wales average 9.0

Tap water in RH6, Reigate and BansteadSafe to drink.Moderately soft.

Supplied by Thames Water. 74 samples, 23 substances, latest on 31 December 2025. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.3 / 10

The tank is as full as the score. The specks are the minerals that make water hard.

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 RH6 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.

Nitrite came closest to a limit, at 38% of it. 18 of 19 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitSelenium: 0.0004 mg/L, 1% of the 0.04 mg/L limitSelenium1%Manganese: 0.0006 mg/L, 1% of the 0.05 mg/L limitManganese1%Boron: 0.02 mg/L, 2% of the 1 mg/L limitBoron2%Copper: 0.04 mg/L, 2% of the 2 mg/L limitCopper2%Aluminium: 0.0082 mg/L, 4% of the 0.2 mg/L limitAluminium4%Iron: 0.009 mg/L, 5% of the 0.2 mg/L limitIron5%Chromium: 0.0025 mg/L, 5% of the 0.05 mg/L limitChromium5%Fluoride: 0.08 mg/L, 5% of the 1.5 mg/L limitFluoride5%Antimony: 0.0003 mg/L, 6% of the 0.005 mg/L limitAntimony6%Mercury: 0.00007 mg/L, 7% of the 0.001 mg/L limitMercury7%Arsenic: 0.0007 mg/L, 7% of the 0.01 mg/L limitArsenic7%Cadmium: 0.0004 mg/L, 8% of the 0.005 mg/L limitCadmium8%Nickel: 0.0016 mg/L, 8% of the 0.02 mg/L limitNickel8%Lead: 0.0009 mg/L, 9% of the 0.01 mg/L limitLead9%Colour: 1.8 mg/L Pt/Co, 9% of the 20 mg/L Pt/Co limitColour9%Bromate: 0.001 mg/L, 10% of the 0.01 mg/L limitBromate10%Trihalomethanes: 0.015 mg/L, 15% of the 0.1 mg/L limitTrihalomethanes15%Nitrate: 9.4 mg/L, 19% of the 50 mg/L limitNitrate19%Nitrite: 0.19 mg/L, 38% of the 0.5 mg/L limitNitrite38%
  1. Nitrite38%
  2. Nitrate19%
  3. Trihalomethanes15%
  4. Bromate10%
  5. Lead9%
  6. Colour9%
  7. Cadmium8%
  8. Nickel8%
  9. Mercury7%
  10. Arsenic7%
  11. Antimony6%
  12. Fluoride5%
  13. Chromium5%
  14. Iron5%
  15. Aluminium4%
  16. Boron2%
  17. Copper2%
  18. Manganese1%
  19. Selenium1%
  • Coliform Bacteria none found
  • E. coli none found
  • Conductivity 287 µS/cm
All 23 results as a table
SubstanceResultLegal limitShare of limit
Coliform Bacteria0 count/100mlMust be zeroNone found
E. coli0 count/100mlMust be zeroNone found
Colour1.8 mg/L Pt/Co20 mg/L Pt/Co
9%
Conductivity287 µS/cmNo legal limit–
Fluoride0.08 mg/L1.5 mg/L
5%
Nitrate9.4 mg/L50 mg/L
19%
Nitrite0.19 mg/L0.5 mg/L
38%
Hardness (as CaCO3)88 mg/LNo legal limit–
Aluminium0.0082 mg/L0.2 mg/L
4%
Antimony0.0003 mg/L0.005 mg/L
6%
Arsenic0.0007 mg/L0.01 mg/L
7%
Boron0.02 mg/L1 mg/L
2%
Cadmium0.0004 mg/L0.005 mg/L
8%
Chromium0.0025 mg/L0.05 mg/L
5%
Copper0.04 mg/L2 mg/L
2%
Iron0.009 mg/L0.2 mg/L
5%
Lead0.0009 mg/L0.01 mg/L
9%
Manganese0.0006 mg/L0.05 mg/L
1%
Mercury0.00007 mg/L0.001 mg/L
7%
Nickel0.0016 mg/L0.02 mg/L
8%
Selenium0.0004 mg/L0.04 mg/L
1%
Trihalomethanes0.015 mg/L0.1 mg/L
15%
Bromate0.001 mg/L0.01 mg/L
10%

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 Mole - Horley to Dorking, rated bad

The Environment Agency rated the Mole - Horley to Dorking 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 insects and other small river life, phosphate and water plants and algae. 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. Its ecological rating has dropped since the previous assessment.

None of this is a test of your tap water. Environment Agency record · River health across England

RH6 in short

Tap water in RH6 (Reigate and Banstead) is supplied by Thames Water in the Reigate and Banstead Central zone and scores 9.3 out of 10, against an England and Wales average of 9.0. None of the 23 tested substances came close to a limit. The latest sample is from 31 December 2025.

  • The cleanest tap water of the 5 areas tested in Reigate and BansteadRH6 scores 9.3 out of 10, ahead of RH1 in second place on 8.8.
  • Scores higher than all 4 neighbouring districtsThe nearest rival is RH1 on 8.8, against 9.3 here. Compare with RH1
  • Nothing tested came within 40% of its legal limitThe highest was Nitrite at 38% of the 0.5 mg/L maximum. See every reading

Next door

SM77.8 out of 10 · 254 mg/LKT208.6 out of 10 · 225 mg/LRH18.8 out of 10 · 141 mg/LRH28.8 out of 10 · 204 mg/L

Questions about RH6 water

Is RH6 tap water safe to drink?

Based on the latest tests, RH6 (Reigate and Banstead) water scores 9.3/10, which is safe. 0 of 23 tested contaminants exceeded recommended levels. Water is supplied by Thames Water.

What contaminants are in RH6 water?

We tested 23 contaminants in RH6 water. None exceeded recommended safe levels.

Who supplies water in RH6?

RH6 (Reigate and Banstead) is supplied by Thames Water. You can view their full profile and compliance data on our supplier page.

Is RH6 water hard or soft?

Water in RH6 (Reigate and Banstead) 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 RH6?

RH6 water scored 9.3/10 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 RH6 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for RH6, 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 RH6?

The Environment Agency rated the Mole - Horley to Dorking 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 insects and other small river life, phosphate and water plants and algae. 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. Its ecological rating has dropped since the previous assessment. This is a rating of the river, not of tap water in RH6, 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 RH6

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
Turbidity35 NTU4 NTU
pH7.1 pHNone
Temperature11.9 °CNone
Conductivity554 µS/cmNone
Ammonia0.069 mg/L0.5 mg/L
Nitrate7 mg/L50 mg/L
Nitrite0.082 mg/L0.5 mg/L
Phosphate0.081 mg/LNone
Dissolved Oxygen6.18 mg/LNone
Cadmium0.00005 mg/L0.005 mg/L

Get alerts for your area

We'll email you when water quality data changes for RH6.

Source: Thames 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