We’ve completed a major upgrade to our stormwater network at AKL – protecting the airport from heavy rainfall and helping care for the Manukau Harbour. We have 4.4km of new underground pipes and an innovative system for storing and treating runoff. New Zealand’s first ‘Coupled Wetland Biofilter’, it treats water from over 100 hectares (that’s 140 rugby fields!) within a 18,000sqm footprint. It has 20,000 native plants creating a living filter. This design treats more than three times the volume