Pittwater

Pittwater
A view of the southern portion of Pittwater.
EtymologyWilliam Pitt the Younger
Location
CountryAustralia
StateNew South Wales
RegionGreater Metropolitan Sydney
MunicipalityNorthern Beaches Council
Physical characteristics
SourceMcCarrs Creek
  locationnorth of Church Point
  coordinates33°38′38.3994″S 151°16′55.2″E / 33.643999833°S 151.282000°E / -33.643999833; 151.282000
2nd sourceCahill Creek
  locationMona Vale
  coordinates33°39′59.3994″S 151°18′41.3994″E / 33.666499833°S 151.311499833°E / -33.666499833; 151.311499833
MouthBroken Bay
  location
West Head and Barrenjoey Head
  coordinates
33°34′47.9994″S 151°18′57.6″E / 33.579999833°S 151.316000°E / -33.579999833; 151.316000
Length10 km (6.2 mi)
Basin size50.8 km2 (19.6 sq mi)
Basin features
River systemHawkesburyNepean
Tributaries 
  leftBilgola Creek
  rightMcMahon's Creek, Careel Creek
IslandScotland Island

Pittwater is a semi-mature tide dominated drowned valley estuary, located about 40 kilometres (25 mi) north of the Sydney central business district, New South Wales, Australia; being one of the bodies of water that separate greater Metropolitan Sydney from the Central Coast.

Pittwater has its origin from the confluence of McCarrs Creek, to the west of Church Point and a number of smaller estuaries, the largest of which is Cahill Creek, that joins the Pittwater north of Mona Vale. The Pittwater is an open body of water, often considered a bay or harbour, that flows north towards its mouth into Broken Bay, between West Head and Barrenjoey Head, less than 1 kilometre (0.62 mi) from the Tasman Sea.

The total area of the Pittwater is 18.4 square kilometres (7.1 sq mi) and around ninety percent of the area is generally administered by the Hawkesbury–Nepean Catchment Management Authority, in conjunction with Northern Beaches Council.

The land adjacent to the Pittwater was occupied for many thousands of years by the Kuringgai peoples, an Aboriginal Australian grouping of uncertain origin. They used the river as an important source of food and a place for trade.

Pittwater was named Pitt Water in 1788 in honour of William Pitt the Younger, the then Prime Minister of the United Kingdom.