Related by context. Frequent words. (Click for all words.) 52 heavily polluted 50 Dongting Lake 49 waterways 49 Songhua river 49 Qiantang River 48 Taihu Lake 48 toxic benzene 48 Three Gorges reservoir 47 dangerously polluted 47 Xijiang River 47 Amur River 47 Bailong River 46 red sludge 45 rivers lakes 45 Poyang Lake 45 discharging pollutants 45 Songhua 45 Tangjiashan quake lake 44 Three Gorges Reservoir 44 contaminating groundwater 44 Yingde 44 navigational hazards 44 swollen creeks 44 Algae blooms 44 Tangjiashan 44 creeks rivers 44 Shen Hong 44 Qingchuan county 43 polluted rivers 43 Photo Gerald Herbert 43 stormwater discharges 43 contaminate drinking 43 Photo Wally Santana 43 faecal contamination 43 polluting groundwater 43 Photo Anjum Naveed 43 phosphorus pollution 43 Soil erosion 43 River Great Ouse 43 Turag 43 Neijiang 43 tributary rivers 43 freshwater habitats 43 desilted 42 Huludao 42 By Shara Tibken 42 sewage discharges 42 waterway 42 deplete oxygen 42 salination 42 Stormwater runoff 42 sediment runoff 42 toxic algae blooms 42 Yangtze river 42 southwestern Yunnan Province 42 navigable rivers 42 polluted 42 rivers 42 tidal creek 42 Fujian Xinhua 42 towpaths 41 pollute groundwater 41 lakeshores 41 oxbows 41 Swollen rivers 41 mighty Danube 41 Drought Relief Headquarters 41 river Jhelum 41 overflowing drains 41 shellfish harvesting 41 Toxic chemicals 41 Kotri Barrage 41 intermittent streams 41 writer Christopher Bodeen 41 Taihu 41 treacherous currents 41 By Anthony Harrup 41 harmful algae blooms 41 watercourse 41 ammonia nitrogen 41 nitrate contamination 41 rivers creeks 40 Septic tanks 40 Huaihe River 40 phosphorus runoff 40 Menai Strait 40 lakes rivers 40 polluting waterways 40 sunken barge 40 By Lilly Vitorovich 40 Sanmenxia 40 PCBs polychlorinated biphenyls 40 Cattaraugus Creek 40 tidal rivers 40 Bryansk region 40 polluted waterways 40 Dado Galdieri 40 Highly radioactive 40 inland bays 40 By Curt Thacker 40 Radiation leaks