Lower Hawkesbury - Sackville
Sackville is located 80 kilometres north west of the Sydney CBD, New South Wales, in the local government area of the Hawkesbury.
Students groups from the schools all over Sydney in conjuction with Brewongle Environment Education Centre carry out annual water quality testing in the Hawkesbury River at Sackville.
About the Hawkesbury River
The Hawkesbury River subcatchment lies on the agricultural and peri-urban fringe of urbanized North Western Sydney. The subcatchment extends from the Nepean River confluence with the Grose River near Yarramundi to the lower estuary of the Hawkesbury River at Webbs Creek near Wiseman’s Ferry.
The tidal influence in the Hawkesbury River extends into this subcatchment, reaching approximately 145km upstream from Broken Bay.