For Raymond Diaz, the last straw came when his nephew cut himself on glass, swimming with Mr Diaz' children in the neighbourhood creek.
"I chucked on the mask and snorkel and it was pretty shocking, all therubbish in there," the Randwick Park resident recalls.
Help was at hand. Mr Diaz' friend and neighbour, Dave Tims, belongs to Urban Neighbours of Hope, a group that aims to inspire locals to help each other to smarten up their neighbourhoods.
Randwick Park is a prime candidate. In recent years, the eastern Manurewa suburb - it isn't really a park as such - has been in the headlines for the murder of liquor store owner Navtej Singh, P-lab busts, gang raids and hit-and-run accidents.
With Mr Tims' help, Mr Diaz organises volunteers each day to take on tasks to beautify their home turf. Today, he and a team are knee-deep in sodden grass on an empty section, shovelling barrowloads of churned-up bark to prepare the land for planting.