The Ku-ring-gai Local Government area spans three of Sydney's major catchments, encompassing 171km of creeks. The Pacific Highway and Mona Vale Road provide an approximate indication of the major catchment boundaries.
- Lane Cove river catchment to the south-west and the Middle Harbour to the east, drain into Sydney Harbour
- To the north, Cowan Creek catchment drains into the Hawkesbury Estuary.
A large proportion of the creeks remain in semi-natural to natural condition in private easements, parkland and bushland reserves. This includes natural banks, intact riparian vegetation and minimal hard engineering. This has a significant impact on the water quality, riparian ecosystems and the receiving environments of Sydney Harbour and the Hawkesbury Estuary.
Water Quality Monitoring
Council undertakes biannual water quality monitoring of these waterways to allow us to track condition and alert us to any influencing factors up stream.
In addition to our extensive waterway network, Ku-ring-gai also has two important wetland communities within the local area:
Both are endangered ecological communities and important natural features within Ku-ring-gai’s catchments.
View Ku-ring-gai Biodiversity and Riparian Lands study (pdf. 5MB)