Related by context. Frequent words. (Click for all words.) 58 dumping raw sewage 54 sewage discharges 53 industrial effluents 53 polluted 53 heavily polluted 53 discharging 52 sewage effluent 52 dumping 52 effluents 51 untreated wastewater 51 discharges 50 ammonia nitrogen 50 effluent 50 contaminating 50 effluent discharge 50 untreated sewage 50 Toxic chemicals 49 Raw sewage 48 harmful contaminants 48 potassium permanganate 48 methylene chloride 48 stormwater discharge 48 contaminating groundwater 48 contaminated 47 Effluent 46 discharge 46 polluting 46 wastewater discharges 46 arsenic laced 46 raw sewage 46 contaminate groundwater 46 Discharging 45 suspected carcinogen 45 pollutions 45 contaminate 45 wastewater discharge 45 unnamed tributary 45 Coliform bacteria 44 indiscriminate dumping 44 settling ponds 44 dumped 44 carcinogenic chemicals 44 Stormwater runoff 44 dischargers 44 ammonia nitrate 44 toxic pollutants 44 sand quarrying 44 creeks rivers 44 Hydrochloric acid 44 sludge 44 sewage 44 PCBs polychlorinated biphenyls 44 purifies 44 improperly disposed 44 effluence 43 inhaling toxic 43 Residues 43 Polluting 43 toxic sludge 43 tailing ponds 43 toxic solvents 43 silts 43 Hydrogen sulfide 43 toxic chemicals 43 polluted waterways 43 waterbody 43 seeping 43 pouring bleach 43 wastewater 43 Songhua river 43 watercourse 43 Polluted 43 fecal coliform bacteria 43 urine feces 43 copper sulphate 43 chemicals 43 trichlorethylene TCE 43 milk powder tainted 43 evaporation ponds 43 Taihu Lake 43 fracturing fluids 43 toxic waste 43 wastewaters 43 polluted groundwater 42 sediment runoff 42 disgorging 42 manure pits 42 poisonous chemicals 42 petroleum distillates 42 sulfuric 42 sludges 42 backflow 42 groundwater extraction 42 suspended solids 42 human excreta 42 pollute 42 contaminates 42 pollutants 42 sewage spills 42 rotting vegetation 42 dripped onto