The River Test is home to endangered species of salmon and otter - Dukas/Universal Images Group EditorialWater from a chalk stream with protected status could be drawn to combat shortages despite concerns for endangered wildlife. Under normal regulations, Southern is restricted from drawing water from the River Test if flows fall below 355 megalitres per day (Ml/d). Without permission to do so, "the approximate 165,000 population of the Southampton West supply area could soon be significantly affected by a restricted water supply", the company said. It cannot be treated as a reserve water supply when water companies' resources are stretched. The chalk stream is a world-renowned destination for fly-fishing, attracting high-profile anglers including members of the Royal family and George H. W. Bush, the former US president.