Total Dissolved Solids (TDS) are organic and non-organic sediments found in water, which contribute to a difference in the taste and appearance of water. Dissolved solids enter our water supply through old piping, run-off from road salts, pesticides, fertilizers and more.

Our new filters reduce more contaminants and last 33% longer. To see the difference for yourself, explore our updated performance data sheet.

Culligan with ZeroWater Technology removes 99.9% of total dissolved solids, including both unwanted contaminants and trace minerals. Our filters are designed to treat everything equally, reducing harmful elements along with minerals that may be naturally present in tap water.

Most health experts agree that your body gets the minerals it needs from food, not water. And according to the Water Quality Association, low-TDS water is safe to drink and widely used around the world. For more, we encourage users to read the Water Quality Association's article: "Consumption of Low TDS Water."

The lifespan of your filter depends on your local water quality and how much water your household uses. The best way to know? Use the included TDS meter. When the reading hits 6 or higher and the amber light turns on, it’s time to replace your filter. Don’t wait, past that point, taste and smell can start to change.

Culligan with ZeroWater Technology filters are certified to reduce over 25 contaminants, including forever chemicals (total PFAS), pharmaceuticals, and heavy metals. For the full list of what we reduce, see our performance results here.

Our filters use coal-based activated carbon mixed with KDF (a copper-zinc blend) and a mixed bed of ion exchange resin in a BPA-free housing. Together, they work to reduce a wide range of contaminants, so all you taste is clean, better water.

You can expect the same quality you know from ZeroWater, now backed by Culligan's resources. Our commitment to quality and care remains at the heart of everything we do. You can continue to trust our filters to remove virtually all total dissolved solids (99.9% of TDS) and reduce lead. We're proud to announce that we’re also certified to reduce total PFAS (forever chemicals), pharmaceuticals, and pesticides. For details on specific contaminant reductions, see our performance data sheet.

While standard filters only reduce a handful of contaminants, Culligan with ZeroWater Technology uses advanced deionization, a process that targets virtually all total dissolved solids (TDS) in your water. From minerals and metals to salts and inorganic compounds, our filters reduce the stuff you don’t want, leaving behind water that tastes crisper and clean.

Here’s what’s happening behind the scenes: As water flows through the filter, it’s pulled through a carefully engineered sequence of filtration materials, each one designed to tackle a specific type of contaminant. Larger particles get trapped first. Then, organic materials like chlorine and herbicides are reduced. After that, the magic of ion exchange begins, where unwanted ions (like lead, nitrate, and heavy metals) are captured and replaced with harmless ones. What’s left is clean, safer, better-tasting water with virtually no dissolved solids.