HOW WE CAN BEST PROTECT OUR FRESH WATER
WETLANDS GREEN ROOFS RAIN WATER TANKS WATERWAY PLANTING FARMING WASTEWATER TOILETS STORMWATERTER RAIN GARDEN PLANTING SHOWER POLLUTION WATER SOURCES
Less than 10% of original wetlands remain. Wetlands are the ‘kidneys’ of the land, filtering and slowing the flow of water, controlling flooding and reducing pollutants. In Auckland a green roof of 60mm depth will retain 72% of annual rainfall. They help reduce peak flows during rainfall by a huge 93%. At least 10m of riparian planting around all waterways These can be hooked up to your laundry or bathroom to provide ‘grey water’ systems – washing machines, toilets etc. Or simply reuse the water in your garden.
Low intensification farming
OUTSIDE THE HOME Around 70% of water that falls onto the city ends up in our piped stormwater system. Wastewater merges valuable sewage with pollutants and chemicals from things like shampoos, washing powders and chemicals we put down our sinks. It goes to the treatment plant.
! Composting, urine separating (pictured) or dual flush. Separating toilets, which only need to be flushed for ‘number 2s’, reduced water useage by 80%. Every time you flush your number ones you use between 3 and 6 litres.
IN THE HOME According to the Journal of Environmental Science and Technology, rain gardens can remove up to 99% of toxins whilst recharging groundwater and reducing runoff. Permeable paving and drain filters can also reduce this. Small pieces of plastic in your cleaners and moisturisers, known as ‘moisture’ or ‘cleansing beads’ or ‘exfoliating pearls’ are too small to be captured by most wastewater treatment plants. They enter the oceans, absorbing toxins on the way, where they can do major damage. Check your ingredients for polyethylene! 70% of stormwater pollutants come from vehicles Change your showerhead to one that is more efficient – save thousands of litres of water each year and dollars on your power bill by using less hot water. Every Aucklander uses on average 275 litres per day. Auckland’s water source is comprised of 60% from Hunua dams, 25% Waitakere dams, 10% from the Waikato River near Tuakau and 5% from bores and spring.