For most contaminants, EPA sets an enforceable regulation called a maximum contaminant level maximum contaminant level The highest level of a contaminant that EPA allows in drinking water. MCLs ensure that drinking water does not pose either a short-term or long-term health risk. EPA sets MCLs at levels that are economically and technologically feasible. Some states set MCLs which are more strict than EPA's. (MCL) based on the MCLG. MCLs are set as close to the MCLGs as possible, considering cost, benefits and the ability of public water systems to detect and remove contaminants using suitable treatment technologies.
On 1 January 1901, federation of the colonies was achieved after a decade of planning, consultation and voting.  This established the Commonwealth of Australia as a dominion of the British Empire.   The Federal Capital Territory (later renamed the Australian Capital Territory ) was formed in 1911 as the location for the future federal capital of Canberra. Melbourne was the temporary seat of government from 1901 to 1927 while Canberra was being constructed.  The Northern Territory was transferred from the control of the South Australian government to the federal parliament in 1911.  In 1914, Australia joined Britain in fighting World War I, with support from both the outgoing Commonwealth Liberal Party and the incoming Australian Labor Party .   Australians took part in many of the major battles fought on the Western Front .  Of about 416,000 who served, about 60,000 were killed and another 152,000 were wounded.  Many Australians regard the defeat of the Australian and New Zealand Army Corps (ANZACs) at Gallipoli as the birth of the nation—its first major military action.   The Kokoda Track campaign is regarded by many as an analogous nation-defining event during World War II.