The single most extensive soil unit mapped around Manhattan, NY is Urban land, till substratum, 0 to 3 percent slopes, covering about 2,449 acres of NY061.
The dominant mapped soils in Manhattan, NY (NY061) by acreage are Urban land, till substratum, 0 to 3 percent slopes; Urban land, till substratum, 3 to 8 percent slopes; Urban land-Flatbush complex, 0 to 3 percent slopes; Urban land, outwash substratum, 0 to 3 percent slopes.
About 62% of housing units in Manhattan, NY (2,228,774 of 3,620,774) were built before 1960, the era of galvanized steel supply lines and cast iron drains.
About 86% of housing units in Manhattan, NY (3,105,628 of 3,620,774) were built before 1980, the period when asbestos-containing materials and lead paint were still in use.
Public discussions about regional water quality note that 20 years into Superfund cleanup, advocates say Hudson River is still too toxic when municipal line overflows occur.
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