A platform for on-site quality water production, the deployable containerized water treatment plant has the capability to produce water “fit for purpose” from existing water resources such as groundwater. It is equipped with a range of water treatment systems to provide water softening, nitrate reduction, iron and manganese removal, sterilisation and desalination functionality. The independent and pre-installed water treatment system consists of modular components inside a modified shipping container. The container features waterproof flooring, insulation on ceiling and walls, doors for personnel access, overhead lighting, air conditioning and heating. For operation in remote locations an optional diesel generator is available. The 20` containerised plant can be trailer mounted for flexible transportability and rapid installation with low on-site footprint.