The Langelier Saturation Index (LSI) helps to determine the scaling potential of water and is based on the study of the carbonate equilibrium in water.

A suspension in a gaseous medium of solid particles, liquid particles or solid and liquid particles having negligible falling velocity.

A highly sensitive method for detecting polymorphisms in DNA.

A form of air treatment whereby temperature, humidity and air cleanliness are all controlled within limits determined by the requirements of the air-conditioned enclosure.

A small, usually aquatic, plant which requires light to grow, often found on exposed areas of cooling towers.

Protozoa able to alter shape as a result of movements of cell processes.

Substances in the blood which destroy or neutralise various toxins or components of bacteria known generally as antigens.

Anti-corrosive chemicals are also known as corrosion inhibitors

Any water system that has been constructed and does not occur naturally such as a hot water system.

See also legionella audits