Related by context. Frequent words. (Click for all words.) 58 stormwater drains 58 Murrumbidgee River 58 stormwater drain 56 Waimakariri River 56 Lake Rotoiti 56 Clutha River 54 Raw sewage 54 Manukau Harbour 53 sewage effluent 53 effluent 53 Haumoana 53 raw sewage 53 Effluent 53 effluent discharge 52 Patea 52 landslip 52 Hurunui 52 Tahuna 51 gasworks 51 Maketu 51 sewage 51 Lake Hawea 50 Coromandel Peninsula 50 Waimarama 50 silt 50 Watercare 50 Whitianga 50 Moerewa 50 weir 50 foreshore 49 catchment 49 Tarawera 49 Waikanae 49 Environment Waikato 49 outfall 49 Boy drowns 49 watercourse 49 Reporoa 49 Sewage Treatment Plant 49 Waitaki River 49 Mangawhai 48 Takaka 48 Hobsonville 48 Sewage 48 Lake Taupo 48 Pukerua Bay 48 Waikouaiti 48 Kaiapoi 48 Waitemata Harbour 48 ocean outfall 48 tar ponds 48 Ohau 48 Burpengary 48 Wairoa 48 sewage overflows 48 Great Dividing Range 48 Waikato Tainui 48 landslips 48 sewerage 48 sewage discharges 48 treated effluent 48 foreshores 48 pine plantation 48 North Stradbroke Island 48 Oakura 48 headworks 48 algal bloom 48 Wingecarribee 48 Hawea 48 Waipa 48 Bucklands Beach 48 Waitakere Ranges 48 coolstore 48 Tongariro 47 Wainuiomata 47 Horowhenua 47 Jindalee 47 Wainui 47 Castlecliff 47 Catchment 47 sewage lagoon 47 Lake Tekapo 47 Tolaga Bay 47 Rotoiti 47 Opua 47 Waimakariri 47 Fitzroy River 47 Kawakawa 47 Barwon Water 47 Whanganui River 47 polluted waterways 47 Paekakariki 47 watermains 47 creek 47 River Derwent 47 Petone 47 Clutha 46 Orakei 46 Rangitikei 46 Waiau 46 sewerage pipes