Peltier lives on the Unceded Anishinawbe Territory on Manitoulin Island in northern Ontario. She began her advocacy on behalf of water at the age of eight and was inspired by her great aunt, Josephine Mandamin.
Autumn Peltier is Anishinaabe-kwe and a member of the Wikwemikong First Nation and an internationally recognized advocate for clean water. She is a water protector and has been called a “water warrior”. Peltier addressed world leaders at the UN General Assembly on the issue of water protection at the age of thirteen in 2018.