Related by context. Frequent words. (Click for all words.) 56 sewage discharges 55 Sheepscot River 55 flowage 55 Creek tributary 55 Presumpscot River 55 headwaters 54 effluent discharge 54 Conemaugh River 54 wastewater discharge 53 Esopus Creek 53 tidal wetlands 53 Anclote River 53 Kaskaskia River 53 tidal waters 53 wastewater effluent 53 watersheds 53 stormwater discharge 52 Neponset River 52 wetlands 52 waterways 52 unnamed tributary 52 estuary 51 Neshaminy Creek 51 lakes 51 Hammonasset 51 ponds 51 riverkeeper 51 Stormwater runoff 51 Pawcatuck River 51 Bushkill Creek 51 sewage effluent 51 Altamaha River 51 lagoons 51 dredge spoils 51 Penobscot River 51 tributary 51 Lake Lillinonah 50 contaminated sediments 50 wastewater 50 Watershed Alliance 50 creeks rivers 50 tailwaters 50 watershed 50 Altamaha 50 Edge Moor 50 Monocacy River 50 headwater 50 polluted groundwater 50 sediment runoff 50 bottomlands 50 groundwater 50 tributaries 50 tributary streams 49 waterway 49 effluent 49 wetland 49 clam flats 49 mainstem 49 sand dredged 49 Champlain Canal 49 tidal marshes 49 Cayuga Lake 49 Pend Oreille River 49 shallow aquifer 49 Aquarion Water Company 49 Owasco Lake 49 tidal marsh 49 trout stream 49 PCBs polychlorinated biphenyls 49 creek 49 Rotenone 49 groundwater withdrawals 49 river 49 native brook trout 49 Berners Bay 49 aquifer recharge 49 Albemarle Sound 49 Assabet River 48 Ogeechee River 48 discharging pollutants 48 watercourse 48 oxbow 48 Tombigbee River 48 Elevation normal 48 dischargers 48 River tributary 48 lake 48 Rancocas Creek 48 aquatic ecosystem 48 dumping raw sewage 48 downstream 48 mussel species 48 Hoosic River 48 Quabbin Reservoir 48 tidal rivers 48 Pond 48 Winooski River 48 riparian buffer 47 Yough River 47 lakeshores 47 DEP