Related by context. Frequent words. (Click for all words.) 50 navigable waters 49 streambanks 48 polluting groundwater 48 discharging pollutants 47 Suisun Marsh 47 navigable waterways 46 riparian zones 46 coastal estuaries 46 deplete oxygen 46 discharging wastewater 45 contaminating groundwater 45 streambeds 45 polluting waterways 44 stormwater discharges 44 ecologically sensitive areas 44 seagrasses 43 waterways 43 aquatic habitats 43 forested wetlands 43 aquatic organisms 43 aquatic ecosystem 42 tidal wetlands 42 headwater streams 42 revegetated 42 inter tidal 42 Sedimentation 42 native brook trout 42 aquatic ecosystems 41 riparian vegetation 41 aquatic habitat 41 intermittent streams 41 Migratory Birds Convention 41 watercourse 41 tidal waters 41 salinization 41 settling ponds 41 groundwater aquifers 41 clam beds 41 polluted runoff 41 Conemaugh River 41 nonnative fish 41 coastal dune 41 Wissahickon Creek 41 intertidal 41 sediment runoff 41 Clean Water Act 41 contaminating 41 pollute waterways 40 Ignacia S. Moreno 40 Ronald J. Tenpas 40 seepages 40 creeks rivers 40 Cheakamus River 40 harvesting oysters 40 ponded 40 Invasive plants 40 freshwater marshes 40 Pollution Act 40 navigational hazards 40 groundwater depletion 40 freshwater habitats 40 Matlacha Pass 40 navigable waterway 39 Oil Spill Prevention 39 eelgrass beds 39 contaminate drinking 39 fragile ecology 39 Dunkard Creek 39 unfishable 39 brushland 39 mussel species 39 Biodiversity Conservation Act 39 embayment 39 Impoundment 39 creeks streams 39 toxic algae blooms 39 tidal rivers 39 befouling 39 dumping raw sewage 39 contaminate groundwater 39 Soil erosion 38 waterbodies 38 freshwater wetlands 38 oil sheens 38 threatened coho salmon 38 Ogeechee River 38 stormwater discharge 38 tailing ponds 38 cordgrass 38 sewage discharges 38 aquifer recharge 38 Berners Bay 38 Matagorda Bay 38 phosphorus runoff 38 recharge groundwater 38 ecologically fragile 38 radioactively contaminated 38 freshwater marsh 38 overharvested 38 Migratory Bird Treaty 38 grossly negligent manner