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Superstorm Sandy caused 11 billion gallons of partially or untreated sewage - the equivalent of Central Park stacked 41 feet high - to leak into rivers, lakes, and waterways, according to this report by Climate Central. New York City reported six sewage spills larger than 100,000,000 gallons, and 28 larger than 1 million gallons. New York authorities estimate it will cost nearly $2 billion to repair flood damaged sewage treatment facilities. Sewage overflow is common in the city, although not on this scale, and climate change will only make things worse, the group warns:
"Climate change is making sewage treatment plants more vulnerable to major failures and overflows due to rising seas, more intense coastal storms, and increasingly heavy precipitation events."