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Tier 1 Combined Sewer Overflow Outfalls - NYC by S.W.I.M. Coalition

When sewage loads exceed the capacity of the City's sewage treatment facilities urine, feces, trash, petroleum products and other nasties are expelled, untreated, into New York Harbor via 494 combined sewer overflow outfalls aka CSOs.  Just 15 of these 494 outfalls, identified as Tier 1, are responsible for spurting out over half the City's raw sewage.  A sewage overflow can be triggered by as little as a tenth of an inch of rain, which essentially means that every time it rains, your toilet flushes directly into New York Harbor.  In New York City a CSO event occurs once a week on average.  CSOs are the single largest impairment to the quality of New York City's waters.    

Tags: sewage CSO stormwater "water pollution"

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