Otisco Lake has been used as a source for public drinking water for residents in the southern and western half of Onondaga County since 1908. In 1909, lake levels were increased by an additional four feet (1.2 m) when the dam was raised to increase the lake's capacity. Today, the lake's use as a public water supply is managed by the Onondaga County Water Authority.[1] In 2011, Otisco Lake provided 17,280,000 US gallons (65,400,000 L) of water per day.[5]