Blood, Trauma, and Biohazard Cleanup in Sparkill, NY

Sparkill, formerly known as Tappan Sloat, is a suburban hamlet and census-designated place in the Town of Orangetown in Rockland County, New York, just west of the Hudson River, south of Piermont and north of Palisades.

Sparkill had a population of 1,581 at the 2020 census, nearly unchanged from 1,565 in 2010, when the CDP counted about 500 households, all within an area of only about half a square mile.

Sparkill is home to St. Thomas Aquinas College, a private college founded in 1952 by the Dominican Sisters of Sparkill, who established it as a teacher-training college for the sisters before it opened to lay students in the 1960s.

The Dominican Sisters of Sparkill, whose motherhouse is in the hamlet, named the college for the medieval Dominican scholar Thomas Aquinas, and the college now offers more than 100 majors, minors, and specializations on a campus of about 72 acres.

Sparkill was once a stop on the Northern Branch of the Erie Railroad, whose trains served Depot Square until passenger service was discontinued in 1966.

In the early 19th century, John Moore, an African American miller, operated a sawmill and gristmill, and from 1810 to 1815 a caning mill, on Sparkill Creek below the present Route 9W viaduct.

The hamlet's Christ Episcopal Church on Valentine Avenue, designed by the Reverend Charles Babcock, was built in 1865 and is marked as one of Sparkill's historic sites.

Sparkill lies about three and a half miles south of the Tappan Zee Bridge and about 14 miles north of the George Washington Bridge, along U.S. Route 9W and New York State Route 340.