Stormwater is the water that runs off surfaces such as roads, footpaths and rooftops and travels down gutters into sumps and then into a stormwater network.

Council manages 28 stormwater networks at Balfour, Browns, Colac Bay, Dipton, Edendale, Limehills-Centre Bush, Lumsden, Manapouri, Monowai, Mossburn, Nightcaps, Ohai, Orepuki, Otautau, Riversdale, Riverton, Stewart Island, Te Anau, Thornbury, Tokanui, Tuatapere, Waikaia, Waikawa, Wairio, Wallacetown, Winton, Woodlands and Wyndham.