Related by context. Frequent words. (Click for all words.) 68 ash byproduct 55 ash ponds 53 Radioactive waste 52 ash 50 contaminating groundwater 49 tailing ponds 49 slurry 49 TVA Kingston Fossil 48 settling ponds 48 coal slurry 48 evaporation ponds 46 coal ash 46 Kingston Fossil Plant 45 sediment 45 flyash 45 polluted groundwater 45 Dunkard Creek 44 water 44 feedwater 44 airborne particulates 44 Conemaugh River 44 toxin laden 44 polluting groundwater 44 rotting vegetation 44 sludge 43 harmful contaminants 43 fly ash 43 mussel species 43 sludges 43 silts 43 headwater streams 43 manure pits 43 methylene chloride 43 impoundments 43 effluent 42 Controlled burns 42 uranium tailings 42 groundwater 42 dissolved solids 42 Widows Creek 42 Highly radioactive 42 mill tailings 42 hydroelectric turbines 42 stormwater discharge 42 tailings pond 42 mountaintop removal mines 42 wastewaters 42 mine tailings 42 dewatered 42 sewage effluent 42 Exxon Valdez supertanker 41 Raw sewage 41 ultraviolet disinfection 41 Seepage 41 toxic byproducts 41 streambeds 41 silt 41 Wissahickon Creek 41 ammonia 41 toxic sediments 41 red sludge 41 Taum Sauk reservoir 41 wastewater effluent 41 Atchafalaya rivers 41 Ogeechee River 41 ponds 41 sumps 41 fracking fluid 41 THMs 41 Stormwater runoff 41 intermittent streams 41 Sulfuric acid 41 heap leach pads 41 dischargers 40 dredged material 40 downstream 40 Lake Tenkiller 40 fecal material 40 Rotenone 40 Sediment 40 Hydrogen sulfide 40 seawater 40 discharging pollutants 40 manure piles 40 poultry manure 40 Sulfur dioxide 40 dewatering 40 carbon tetrachloride 40 total dissolved solids 40 frac fluid 40 contaminants 40 fracturing fluids 40 reservoir 40 hydrofluoric acid 40 contaminate drinking 40 ammonia nitrogen 40 heavily polluted 40 saltwater disposal 39 Talmadge Creek 39 sulfuric acid 39 tidal waters