A tank that is used to inject air into water.

A relatively coarse aperture filter, designed to retain a coat of filter medium on an extended surface.

This is the general term used to describe the accounting undertaken to measure the amount of greenhouse gas emissions (measured in carbon dioxide equivalent units) emitted or avoided being released into the atmosphere by a company’s activities.

A screen used for removing gross solids from domestic or industrial wastewater, with spaces between the bars at least 50mm wide.

Those suspended solids in wastewater that will settle over a certain period of time and are removed in that way.

A semi-solid residue, containing microoroganisms and their products, from any water treatment process.

Reverse seepage of water in a distribution system.

Water used for hotels, restaurants, office buildings and other commercial facilities.

A shallow pond where sunlight, bacterial action, and oxygen work to purify wastewater.

The process by which soluble materials in the soil, such as salts, nutrients, pesticide chemicals or contaminants, are washed into a lower layer of soil or are dissolved and carried away by water.