Related by context. Frequent words. (Click for all words.) 58 sewage discharges 56 discharging pollutants 54 ballast water 53 oceangoing ships 51 Ballast Water 51 dumping raw sewage 50 wastewater discharge 48 discharges 48 wastewater effluent 48 stormwater discharge 47 Somali territorial waters 47 sonar exercises 46 wastewater discharges 46 viral hemorrhagic septicemia 46 infested waters 46 sewage effluent 46 Elimination System NPDES 46 ocean freighters 45 harmful contaminants 45 dischargers 45 lakes rivers 45 ships 45 single hulled tankers 45 navigable rivers 45 navigational hazards 45 Methyl bromide 45 creeks rivers 45 Clean Water Act 45 coastal waters 44 waterways 44 mussel species 44 effluent discharge 44 sanitary sewer overflows 44 aquatic nuisance 44 discharging 44 rivers lakes 44 navigable waterways 44 National Pollution Discharge 44 polybrominated diphenyl ethers 44 sulfur dioxide nitrogen oxide 43 Reverse Osmosis 43 hazardous substances 43 Recreational anglers 43 Somali pirates seize 43 sand dredged 43 shoreline erosion 43 Great Lakes basin 43 toxic substances 42 pollution 42 inland waters 42 invasive mussels 42 nearshore waters 42 effluent 42 saltwater 42 bilge 42 shipbreaking 42 Rotenone 42 effluents 42 cargo ships 42 untreated sewage 42 salties 42 transporting hazardous materials 42 navigable waters 42 Environmental Quality DEQ 41 toxic wastes 41 mercury PCBs 41 double hulled tankers 41 outfalls 41 dangerously polluted 41 deplete oxygen 41 Boundary Waters Treaty 41 unseaworthy 41 Oil Spill Prevention 41 toxic pollutants 41 contaminating groundwater 41 Great Lakes Compact 41 Great Lakes 41 cruise ships 41 GPCB 41 polluting 41 sludges 41 waters 41 Service NMFS 41 oceangoing vessels 41 Ronald J. Tenpas 41 Nawiliwili Harbor 41 additive MTBE 41 Concealed weapons 41 inland waterways 41 dissolved solids 41 ISPS Code 41 total dissolved solids 40 untreated wastewater 40 USEPA 40 desalinate 40 smokestack emissions 40 ecologically sensitive areas 40 tailings disposal 40 groundwater withdrawals 40 vessels 40 hazardous wastes