What are the terms “Parts Per Million” (PPM) and “Total Dissolved Solids” (TDS)?
A11: Parts Per Million (PPM) is a measure of concentration. When dealing with RO systems, PPM is important. Usually with salty water, the majority of the PPM numbers are from sodium and chloride (everyday salt). Along with other items in the salt water such as magnesium, calcium, potassium, —all of these become the Total Dissolved Solids (TDS) measured in PPM. Our Brackish MMP can handle 10,000 PPM of TDS per day. Our Sea Water MMP can handle up to 45,000 PPM of TDS per day. (Note: Typically about 38,000 PPM of the 45,000 PPM will be sodium and chloride ions—salt).
