In 2005, the Breakfast Creek catchment area was rated the third highest polluting catchment out of the twenty-two catchments in the Blacktownlocal government area. Breakfast Creek is severely modified and has few significant natural values with regard to habitat and longitudinal connectivity. A 900 metres (3,000 ft) concrete channel bisects the creek and fish barriers are present every 300–500 metres (980–1,640 ft). There is little to no connectivity with the floodplain and riparian vegetation is scattered or non-existent. In-stream habitats are homogenous but both bed and bank are largely stable. There were no significant populations of noxious aquatic weeds identified during the assessment. Large carp were noted throughout the creek during the 2005 study. Breakfast Creek attributes include community usage and access, such as the Ashlar Golf Course. The cycle paths and proximity to sports facilities and schools throughout much of the creek have led to one of the most accessible watercourses within Blacktown.