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Quality Water Filters 4 You Posting Page
Friday, March 16, 2012
We have been getting questioned a lot about water filters not lowering the TDS levels when tested with a TDS meter. The reason that the total dissolved solids are not showing much lower on your TDS meter is because most water filters are designed to leave the good minerals in the water such as calcium and magnesium. So the meter is reading these minerals.

The only way to remove hard water (calcium and magnesium) is with a water softener, reverse osmosis and water distillers, but please note a water softener will not lower TDS’s either as it removes the calcium and magnesium ions that cause hard water, but the ions are replaced with equal number of sodium or potassium ions. So the overall TDS is unchanged.

Reverse osmosis water filters and distillers will lower the TDS levels as they remove the calcium and magnesium from the water. So when purchasing water filters do not expect them to lower your TDS levels much unless it is stated by the manufacturer that it lowers the TDS levels. We have seen people on forums and reviews bashing manufacturer’s products because of this issue. I just believe it is because the customer just doesn’t understand the filtering process stated above. 

“Stop using the TDS (total dissolved solids) meter as the only measurement of water quality. Disinfection Byproducts like Trihalomethanes, Volatile Organic Compounds, METHYL tertiary-butyl ether, chlorine, chloramines, cysts and lead are the primary contaminants to Public Water Systems. They have no impact on the conductivity of the water. Yet these do not register on a TDS meter. And public water systems primarily supply from surface water that tends to have low TDS levels.” ( Water Conditioning & Purification Magazine, March 2009, page 42 )






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by: Chris Tracey

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