Tap water quality in Greenwich

• TasteOKGood

  Unfiltered tap water

  OK

  Filtered with EcoPro

  Good

• ChlorineHigh quality0.42 mg CL2/lTotal chlorineHigh quality0.084 mg CL2/l

  Unfiltered tap water

  High quality

  Filtered with EcoPro

  High quality

  The water company reports total chlorine, which includes chloramine: the disinfectant that keeps the water safe to drink all the way to your tap.

• LimescaleHigh264 mg CaCO3/lLow264 mg CaCO3/lLimescale inhibitor

  Unfiltered tap water

  High

  Filtered with EcoPro

  Low

  Hardness (calcium and magnesium) does not change when you filter, which is why the value is the same in both columns. The EcoPro filter contains a limescale inhibitor that stops those minerals from forming deposits in kettles, coffee machines, taps and pipes: the water is just as hard, but it no longer forms limescale.

• MineralsHigh quality366.1 mg/lHigh quality366.1 mg/lMinerals kept

  Unfiltered tap water

  High quality

  Filtered with EcoPro

  High quality

  TAPP Water EcoPro filters do not remove healthy minerals such as calcium and magnesium, so the mineral content (total dissolved solids, TDS) is the same before and after filtering.

• PathogensDrinkableHigh quality

  Unfiltered tap water

  Drinkable

  Filtered with EcoPro

  High quality

• Heavy metalsDrinkableHigh quality

  Unfiltered tap water

  Drinkable

  Filtered with EcoPro

  High quality

• MicroplasticsNot reportedNot reported

  Unfiltered tap water

  Filtered with EcoPro

  Microplastics have been found in most tap water, although the amount varies. Water companies do not report on microplastics.

• PFASNot reportedNot reported

  Unfiltered tap water

  Filtered with EcoPro

  PFAS in drinking water are covered by Drinking Water Inspectorate guidance to water companies. Where no value appears, the water company has not reported one.

The "Filtered" column shows the estimated result after filtering with TAPP Water EcoPro filters.