An acronym for Parts Per Million, a measurement used to describe dilute concentrations of substances in water or soil.

Things you need to know

In terms of water treatment systems, the U.S Public Health Service recommends a fluoride concentration of 0.7 mg/L (parts per million [ppm]) to maintain caries prevention benefits and reduce the risk of dental fluorosis.

Also known as

Parts Per Million

Mentioned in

Bottled Water Delivery Cost