Abstract: In one embodiment the invention relates to a filter media for removal of contaminants from water comprising aluminium coated granular activated carbon and granular zeolite. Another embodiment relates to a method of producing aluminium coated granular activated carbon comprising exposing granular activated carbon to an aqueous solution comprising one or more aluminium salts which is acidified to a pH of between about 5 and about 6.8, removing the aqueous solution and washing and drying the aluminium coated granular activated carbon that is produced. Further embodiments relate to: a filter system for removal of contaminants from water comprising (i) a middle zone comprising granular activated carbon and granular zeolite and (ii) a lower barrier zone comprising screening material, wherein the system allows a flow rate of water there through of from about 0.5 Lsec-1 m?2 to about 10 Lsec?1m31 2; a cartridge containing the filter system and related methods of removing contaminants from water.

Abstract: A method of modelling a water harvesting and treatment system, the method comprising: receiving modelling data, the modelling data comprising a plurality of parameters relating to intended application of the water harvesting and treatment system; accessing rainfall data for a geographic region for a predetermined historical period, the rainfall data comprising data for a plurality of predetermined time increments over the historical period; and generating a model of the water harvesting and treatment system based on the rainfall data and the modelling data.