Related by context. Frequent words. (Click for all words.) 61 contaminating groundwater 54 tailing ponds 54 polluted waterways 54 polluting 53 contaminating 53 sediment runoff 53 pollute groundwater 53 pollution 52 polluted groundwater 51 sewage discharges 51 heavily polluted 51 toxic algae blooms 51 pollute 51 contaminate groundwater 51 polluted 51 wastewater discharge 50 contaminate drinking 49 waterways 49 dumping 49 toxic waste 48 Clean Water Act 48 polluted runoff 48 wetlands 48 Toxic chemicals 48 wastewater discharges 48 nutrient runoff 48 Dunkard Creek 48 contaminated 48 pollutants 48 ecologically sensitive areas 48 Polluting 48 effluent discharge 47 livestock manure 47 carcinogenic chemicals 47 toxic pollutants 47 polluters 47 contamination 47 environmentally unsound 47 pollutant 47 nutrient pollution 46 improperly disposing 46 Illegal dumping 46 toxic chemicals 46 hydropower dam 46 toxic substances 46 POLLUTION 46 tailings ponds 46 smokestack emissions 46 Environmental Protection 46 environmental 45 headwater streams 45 contaminants 45 environmentalists 45 suspected carcinogen 45 pollutions 45 harmful contaminants 45 freshwater mussels 45 Raw sewage 45 polluter 45 dischargers 45 sewage sludge 45 enviromental 45 bio solids 45 contaminate 45 Environment Protection Agency 45 phosphate mining 44 cattle carcasses 44 herbicides pesticides 44 mercury pollution 44 toxic algae bloom 44 wetland 44 environmentally destructive 44 contaminated soil 44 stormwater pollution 44 coal slurry 44 wildlife habitats 44 aquatic organisms 44 Polluted 44 creeks rivers 44 rivers lakes 44 sewage spills 44 overharvesting 44 landfills 44 flame retardant chemicals 44 sediment 44 aquatic ecosystem 44 hazardous waste 44 air pollution 44 rainforest destruction 44 groundwater contamination 44 effluent 43 Columbia Riverkeeper 43 emitting greenhouse gases 43 polluted rivers 43 environmentally damaging 43 Controlled burns 43 nutrient loading 43 Environmentalists 43 Environmental Protection Agency 43 pollutants emitted 43 animal droppings