How did Onondaga Lake become polluted?

Lake onondaga polluted
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How did Onondaga Lake become polluted?

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The water quality of Onondaga Lake has been impacted by more than a century of domestic and industrial pollution from the homes, businesses and industries in the lake watershed in and around Syracuse, N.Y. Although the condition of the lake has improved since the passage of the Clean Water Act of 1972 and the closure of Allied-Signal Inc.’s lakeside industrial operations in 1986, there are pollution issues remaining for the lake’s water quality, its aquatic life and bottom sediments. The major sources of the pollution can be divided into two main areas: those related to wastewater collection and treatment and those related to industrial operations and uses. Those pollution issues related to wastewater include ammonia and phosphorus which are released to the lake in the treated effluent from the Syracuse Metropolitan Wastewater Treatment Plant (Metro) and secondly, bacteria and floatables from combined sewer overflow discharges which enter the lake via three of the lake’s tributary stre

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