Why should I measure the TDS of water?

In the United States, EPA regulations recommend a maximum water contamination level of 500mg/L (or TDS level of 500 ppm). If this figure exceeds 1000 ppm, the water is generally considered unfit for human consumption.

The TDS meter is an excellent means by which you can regularly test your water supply, as well as your water purification system and its performance in cleaning your water. If you notice the TDS level beginning to show an increase in your reverse osmosis or other water purification system, then it is time to change the filters or cartridges. A high TDS from tap water could indicate the possibility of hard water, resulting from a build-up of scale in pipe delivery systems.

A high TDS figure represents water which could be undesirable in taste, with a salty, metallic or bitter tasting water. Remember, the EPA's recommended maximum TDS level is 500mg/L (or 500ppm).

How do I reduce the TDS reading of my water supply?