Absorption Absorption bed Acid Rain Acidic Soil Adhesion Adsorption Aeration Aeration Zone Aerobic Aerobic Bacteria Aerobic Treatment Agricultural Land Agrochemical Algae Alkali Alluvial soils Altitude Ambient Temperature Ammonia Ammonium Ammonium Fixation Amoeba Anaerobic Anhydrous Ammonia Animal unit Aquaculture Aquatic Aquatic life Aquifer Arid Artesian Aquifer Artesian well Artesian zone Aseptic Assimilation atment Plant Atmosphere Atmospheric Deposition Atmospheric Pressure Atmospheric Transport Atom Atomic number Autotrophic Back Pressure Backflow Bacteria Baseflow Basin Bay Bedrock Benthic zone Best Management Practices Bicarbonates Bioaccumulation Bioavailability Biochemical Biocide Biodegradable Biodegradation Biogas Biological Contaminants Biological Control Biological Diversity Biological Growth Biological Integrity Biological Oxidation Biological Oxygen Demand Biomass Biosphere Biota Biotic Black Ice Black Water Bloom Blue-green Algae Bog Boulder Bound Water Brackish Ice Brackish Water Brine Brownian Movement Buffer Strips Buffer Zone Bulk Density Byproduct Detention-pond Evapotranspiration Hydraulic gradient Hydrologic Cycle Infiltration Ocean Discharge Waiver Odor Threshold Off-Site Facility On-Site Facility Oral Toxicity Organic contaminants Organic Matter Organism Organophosphates Organophyllic Osmosis Overdraft Overflow Rate Overland Flow Oxidant Oxidation Oxidation Pond Oxygen demand Palustrine Parasite, parasitic Particulate Pathogen Pathogenic Peak flow Peat Land Percolation Permeability pH Photic zone Photosynthesis Phytoplankton Plankton Planktonic Plume Point source pollution Pollutant Pollution Pollution Prevention Pond Pore water Porosity Porous Portal-of-Entry Effect Potable ppb ppm ppt Precipitation Primary Waste Treatment Pristine Product Water Profundal zone Protozoan Public Water System Qualitative Use Assessment Quality Assurance Raw Sewage Raw Water Reaeration Recarbonization Receiving waters Recharge Recharge Area Recharge Rate Reclaimed wastewater Reclamation Recommended Maximum Contaminant Level Recycle/Reuse Recycled water Reservoir Residence time Restoration Return flow Reverse osmosis Riparian Habitat Riparian zone Risk Assessment Risk Management River River Basin Runoff Safe Water Safe Yield Salinity Salt Water Intrusion Salts Salvage Sand Filters Sanitary Water Saturated Zone Saturation Secondary Treatment Sediment Yield Sedimentation Sedimentation Tanks Sediments Seepage Semi-Confined Aquifer Septic System Septic Tank Settleable Solids Settling Tank Sewage Sewage Sludge Sewer Sewerage Silt Silviculture Sink Site Assessment Program Slow Sand Filtration Sludge Slurry Smog Smoke Soil Adsorption Field Soil and Water Conservation Practices Soil Conditioner Soil Erodibility Soil Gas Soil Moisture Sole-Source Aquifer Solid Waste Solid Waste Disposal Solid Waste Management Tail Water Temporary Wetlans Terrace Terrain Thermal Pollution Threshold Tillage Topography Total Dissolved Phosphorous Total Dissolved Solids Total Suspended Particles Total Suspended Solids Toxic Pollutants Toxic Substance Toxic Waste Toxicity Transient Water System Transpiration Treated Wastewater Trickle Irrigation Trickling Filter Tundra Turbidity Ultraviolet Rays Unconfined Aquifer Underground Storage Tank Unsaturated Zone Urban Runoff Vadose Zone Vapor Pressure Vegetative Controls Viscosity Volatile Volatile Liquids Volatile Organic Compound Volatile Solids Waste Characterization Waste Generation Waste Minimization Waste Reduction