Water PollutantsWater Pollutants, RadioactiveWaterWater Pollutants, ChemicalWaste WaterWaste Disposal, FluidAir PollutantsWater PurificationSewageWater SupplyIndustrial WasteEnvironmental PollutantsFresh WaterWater PollutionBody WaterBiological Oxygen Demand AnalysisWater MicrobiologyEnvironmental MonitoringBiodegradation, EnvironmentalWaste ManagementOzoneNitrogen DioxideAir PollutionSulfur DioxideSoil PollutantsWater MovementsFlocculationRiversEnvironmental ExposureParticulate MatterWaste ProductsRNA, Ribosomal, 16SBacteriaWater DeprivationVehicle EmissionsFiltrationDNA, RibosomalWater SofteningWater Pollution, ChemicalOrganic ChemicalsDrinkingHydrocarbons, ChlorinatedCitiesMetals, HeavyPhylogenyPolychlorinated BiphenylsEpidemiological MonitoringTemperatureSeawaterEnvironmental PollutionSeasonsSequence Analysis, DNAWater WellsCarbanilidesMedical WasteDNA, BacterialNitrificationAmmonia