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We have updated our Privacy Notice. These changes are designed to provide greater clarity on how we use your personal information and to consolidate previously separate EU and rest-of-world notices into a single document.

Does ZeroWater Remove Chloride?

YES! When tested in accordance with the NSF's protocol based on a 40 gallon filtration (double the rated usage), ZeroWater removes 99% of Chloride from your tap water.

The Premium 5-Stage Ion Exchange Water Filtration System reduces more contaminants than standard 2-Stage filters.

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Sodium Chloride harvesting

How does Chloride get into your water?

Chloride - natural salt mine

ZeroWater has dedicated a news article which addressed this contaminant before. You can find it here on our news site: Chloride in Your Tap Water is it Safe?

Wikipedia tells us that Chloride is nothing more then an atom of Chlorine with an extra electron or CL-, where the minus symbol represents the negative one charge.

It is formed when the element Chlorine (a halogen) gains an electron or when a compound such as Hydrogen Chloride is dissolved in water or other polar solvents.

Chloride salts such as Sodium Chloride easily dissolve in water.

Sea water contains 1.94% Chloride. Some chloride-containing minerals include the chlorides of sodium (Halite or NaCl), potassium (Sylvite or KCl), and magnesium (Bischofite), hydrated MgCl2.

The concentration of Chloride in your blood is called Serum Chloride. Your kidneys regulate it's concentration in your blood.

A Chloride ion is a structural component of some of our proteins, e.g., it is present in the Amylase enzyme.

The chlor-alkali industry is a major consumer of the world's energy budget.

In this industrial process Sodium Chloride is converted into Chlorine and Sodium Hydroxide, which are used to make many other materials and chemicals.

At a certain point in time according to the university of Nottingham 1% of all energy in Britain was used to do this.

The process involves two parallel reactions:

2 ClCl
+ 2 e
2 H
+ 2 e → H2 + 2 OH

Another major application involving Chloride is desalination, which involves the energy intensive removal of Chloride salts to obtain drinkable water from sea water.

Chloride salts are often used in a domestic context such as Sodium Chloride which is used to preserve food.

Almost all natural waters contain Chloride and Sulphate ions. Their concentrations vary considerably according to the mineral content of the earth in any given geographical area you might be living in Britain.

Chloride may get into surface water from several sources including:

  • Waste water from industries and municipalities
  • Waste water from water softening
  • Road salting
  • Agricultural run off
  • Produced and present in water from gas and oil wells

The Health Implications of Chloride

Chloride intake when in small amounts is not significant. In large concentrations they can present problems. Usually Chloride concentrations are low in Britain.

Sulphates can be more troublesome because they generally occur in greater concentrations. Low to moderate concentrations of both Chloride and Sulphate ions add palatability to your drinking water.

Excessive concentrations of either, of course, can make water unpleasant to drink and we therefore recommend you filter your water.

Drinking Water Regulations recommend a maximum concentration of 250 mg/L for Chloride ions and 250 mg/L for Sulphate ions (expressed as Cl- and S04--, not as CaC03).

How are the ZeroWater filters tested?

Test results as performed by 3rd party laboratory is based on NSF/ANSI testing protocol of pour through devices for contaminants listed under the National Primary Drinking Water Standards.

Contaminants were tested at the average Influent Challenge Concentration levels as established under testing protocols by contaminant type. Results shown are based on a 40 gallon filtration, double the rated usage to ensure consumer safety.

These results are calculated from an average of two pH's (6.5pH and 8.5pH) * Indicates NSF Certified Contaminant reduction percentages for ZeroWater. These results are calculated from an average of two pH's (6.5pH and 8.5pH) Testing performed Quality Filter Testing Laboratory, LLC located in Wilmington, DE. Quality Filter Testing Laboratory, LLC is an independent ISO 17025 laboratory certified by WQA and IAPMO to test water filters as per NSF/ANSI Std 42, 53, 58, 401, 473, P231.

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