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Effects of Chloride in Well Water, and How To Remove It

Chloride is one of the most common anions found in tap water.

It generally combines with calcium, magnesium, or sodium to form various salts: for example, sodium chloride (NaCl) is formed when chloride and sodium combine.

Chloride occurs naturally in groundwater but is found in greater concentrations where seawater and run-off from road salts (salts used to de-ice icy roads) can make their way into water sources.

As such, well owners near snowy roads or road salting storage facilities are especially at risk for high levels of sodium chloride.

Although chlorides are harmless at low levels, well water high in sodium chloride can damage plants if used for gardening or irrigation, and give drinking water an unpleasant taste.

Over time, sodium chloride's high corrosivity will also damage plumbing, appliances, and water heaters,  causing toxic metals to leach into your water.  Interestingly, there is no federally enforceable standard for chlorides in drinking water, though the EPA recommends levels no higher than 250 mg/L to avoid salty tastes and undesirable odors.

At levels greater than this, sodium chloride can complicate existing heart problems and contribute to high blood pressure when ingested in excess.

RO systemThe good news is that chlorides can easily be removed from water with either a reverse osmosis system or a distiller.

Reverse osmosis works by passing water through a semi-permeable membrane that separates pure water into one stream and salt water into another stream.

In regular osmosis water flows from a lower concentration of salts to higher concentrations; in reverse osmosis the application of pressure greater than the osmotic pressure reverses the water flow from higher concentrations to much lower concentrations, producing pure water.

With this method, about 50% of water can be recovered as pure water, while about 50% becomes salty wastewater.  (If you'd like, you can read the reverse osmosis FAQ on our website for more info.)

Distillers, on the other hand, use evaporation and condensation to separate pure, fresh water from its contaminants.

The prolonged boiling process kills virtually all types of microorganisms, including bacteria, viruses, and parasites.

Microorganisms are not evaporated into the product water but remain in the boiling chamber as part of the residue.  Distillers work very well, but use a lot of electricity.

If you looking to remove chloride from your water, see our web store for a wide selection of both point-of-use and point-of-entry RO systems, as well as distillers.

If you have any further questions you can e-mail us at [email protected],  or use our online contact form.

We love to hear from you and will get back to you usually within one business day.

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