Related by context. Frequent words. (Click for all words.) 71 effluent 61 pollutants 59 untreated sewage 58 toxic wastes 58 toxic pollutants 56 hazardous wastes 55 leachate 54 sewage 54 suspended solids 54 fly ash 54 pollution 52 treated effluent 52 wastewater 52 Pollutants 52 CPCB 52 untreated wastewater 51 sludge 51 pollutant 51 contaminants 51 tanneries 51 raw sewage 50 wastewater discharge 50 waste incineration 50 Pollution Control Board 49 toxic substances 49 harmful gases 49 toxins 49 sponge iron 49 toxic chemicals 48 exhaust gases 48 harmful pollutants 48 siltation 48 discharges 48 toxic waste 47 turbidity 47 groundwater 47 stormwater drains 47 particulates 47 VOCs 47 sewage sludge 47 flue gas 47 outfall 47 wastes 47 gases 47 toxic gases 46 ammonia 46 hazardous waste 46 polluted 46 recyclable waste 46 potable 46 poisonous chemicals 46 hazardous chemicals 46 silt 46 sewerage 46 radioactive substances 46 polluted runoff 46 pollutant emissions 46 sedimentation 45 hydrogen sulphide 45 Sewage 45 desilting 45 eutrophication 45 polluting 45 sewage treatment 45 sediment 45 waste 45 contaminated groundwater 45 stormwater runoff 45 borewells 45 wastewater treatment 44 Tirupur 44 ballast water 44 harmful substances 44 septage 44 residues 44 methane 44 rivers lakes 44 harmful chemicals 44 chemicals 44 watercourses 44 tailings 44 impurities 44 leaching 44 solids 43 nutrient pollution 43 dioxins 43 waste disposal 43 hazardous substances 43 pollute 43 alkalinity 43 volatile organic compounds 43 sulfur dioxide 43 excreta 43 dissolved oxygen 43 rainwater 43 byproducts 43 sulphate 43 recirculation 43 chlorine 43 vinyl chloride 43 lagoons