Related by context. Frequent words. (Click for all words.) 64 polluted 61 waterways 58 polluted rivers 57 waterway 56 estuary 51 watersheds 51 Superfund site 50 shoreline 49 pollution 49 wetlands 49 Raw sewage 48 lakes 48 lagoon 48 tributary 48 polluted runoff 48 contaminated sediment 48 waterfront 48 rivers 48 freshwater lakes 47 silted 47 river 47 Superfund sites 47 estuaries 47 pollutants 47 raw sewage 47 nutrient pollution 47 outfalls 47 PCB contamination 47 outfall 47 wetland 46 superfund 46 headwaters 46 algal bloom 46 wetland habitat 46 aquatic habitat 46 Superfund cleanup 46 Gowanus Canal 46 riverside 46 polluting 46 creek 46 untreated sewage 45 fragile ecosystem 45 tributaries 45 parklands 45 aquatic ecosystems 45 sewage 45 lagoons 45 sewage overflow 45 marshland 45 watercourse 45 sewage treatment 45 contaminated 45 toxic waste 45 sewage overflows 45 mud flats 45 lake 45 contaminated groundwater 45 watershed 45 pollutant 45 stormwater runoff 45 canal 44 stormwater drains 44 sewage spills 44 dredged material 44 effluent 44 tourist attraction 44 canals 44 ponds 44 riverbanks 44 wildlife habitats 44 sewer overflows 44 shellfish beds 44 garbage dump 44 wetland restoration 44 stormwater pollution 44 watercourses 43 Polluted 43 contaminants 43 spawning habitat 43 drainage ditches 43 bird sanctuary 43 parkland 43 beaches 43 floodplain 43 toxic algae 43 biologically diverse 43 polychlorinated biphenyls PCBs 43 eyesore 43 mudflats 43 riverfront 42 toxic pollutants 42 Estuary 42 shorelines 42 Anacostia River 42 River tributary 42 eyesores 42 silt 42 marine ecosystem 42 fecal coliform bacteria 42 untreated wastewater 42 sediment