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Map
A
- A-Scale Sound Level
- Abandoned Well
- Abatement
- Abatement Debris
- Absorbed Dose
- Absorption
- Absorption Barrier
- Accident Site
- Acclimatization
- Acid
- Acid Aerosol
- Acid Deposition
- Acid Mine Drainage
- Acid Neutralizing Capacity
- Acid Rain
- Acidic
- Act
- Action Levels
- Activated Carbon
- Activated Sludge
- Activator
- Active Ingredient
- Activity Plans
- Acute Effect
- Acute Exposure
- Acute Toxicity
- Adaptation
- Add-on Control Device
- Adequately Wet
- Adjournment
- Administered Dose
- Administrative Order
- Administrative Order On Consent
- Administrative Procedures Act
- Administrative Record
- Adsorption
- Adulterants
- Adulterated
- Advanced Treatment
- Advanced Wastewater Treatment
- Adverse Effects Data
- Advisory
- Aerated Lagoon
- Aeration
- Aeration Tank
- Aerobic
- Aerobic Treatment
- Aerosol
- Affected Landfill
- Affected Public
- Afterburner
- Age Tank
- Agent
- Agent Orange
- Agricultural Pollution
- Agricultural Waste
- Agroecosystem
- AHERA Designated Person (ADP)
- Air Binding
- Air Changes Per Hour (ACH)
- Air Cleaning
- Air Contaminant
- Air Curtain
- Air Exchange Rate
- Air Gap
- Air Handling Unit
- Air Mass
- Air Monitoring
- Air Padding
- Air Permeability
- Air Plenum
- Air Pollutant
- Air Pollution
- Air Pollution Control Device
- Air Pollution Episode
- Air Quality Criteria
- Air Quality Standards
- Air Sparging
- Air Stripping
- Air Toxics
- Air/Oil Table
- Airborne Particulates
- Airborne Release
- Alachlor
- Alar
- Aldicarb
- Algae
- Algal Blooms
- Algicide
- Aliquot
- Alkaline
- Alkalinity
- Allergen
- Alluvial
- Alternate Method
- Alternative Compliance
- Alternative Energy
- Alternative Fibers
- Alternative Fuels
- Alternative Remedial Contract Strategy Contractors
- Alternative Transportation
- Ambient Air
- Ambient Air Quality Standards
- Ambient Measurement
- Ambient Medium
- Ambient Temperature
- Amendment
- Amprometric Titration
- Anaerobic
- Anaerobic Decomposition
- Ancient Forest
- Animal Dander
- Animal Studies
- Anisotropy
- Annular Space, Annulus
- Antagonism
- Antarctic "Ozone Hole"
- Anti-Degradation Clause
- Anti-Microbial
- Applicable Or Relevant And Appropriate Requirements (ARARs)
- Applied Dose
- Apportionment
- Appropriation
- Aquaculture
- Aqueous
- Aqueous Solubility
- Aquifer
- Aquifer Test
- Aquitard
- Architectural Coatings
- Area Of Review
- Area Source
- Arms Control
- Aromatics
- Arsenicals
- Artesian (Aquifer Or Well)
- Asbestos
- Asbestos Abatement
- Asbestos Assessment
- Asbestos Program Manager
- Asbestos-Containing Waste Materials (ACWM)
- Asbestosis
- Ash
- Assay
- Assessment Endpoint
- Assimilation
- Assimilative Capacity
- Association Of Boards Of Certification
- Asthma
- Atmosphere
- Atomic Energy
- Attainment Area
- Attenuation
- Attractant
- Attrition
- Availability Session
- Available Chlorine
- Avoided Cost
B
- Back Pressure
- Backflow/Back Siphonage
- Background Level
- Backwashing
- Backyard Composting
- BACT - Best Available Control Technology
- Bacteria
- Bactericide
- Baffle
- Baffle Chamber
- Baghouse Filter
- Bailer
- Baling
- Ballistic Separator
- Band Application
- Banking
- Bar Screen
- Barrel Sampler
- Barrier Coating(s)
- Basal Application
- Basalt
- Beach Closure
- Bean Sheet
- Bed Load
- BEN
- Bench-scale Tests
- Benefit-Cost Analysis
- Benthic/Benthos
- Bentonite
- Beryllium
- Best Available Control Measures (BACM)
- Best Available Control Technology (BACT)
- Best Demonstrated Available Technology (BDAT)
- Best Management Practice (BMP)
- Bill
- Billfish
- Bimetal
- Bioaccumulants
- Bioassay
- Bioavailabiliity
- Biochemical Oxygen Demand (BOD)
- Bioconcentration
- Biodegradable
- Biodiversity
- Biological Contaminants
- Biological Control
- Biological Integrity
- Biological Magnification
- Biological Measurement
- Biological Medium
- Biological Oxidation
- Biological Oxygen Demand (BOD)
- Biological Pesticides
- Biological Stressors
- Biological Treatment
- Biologically Effective Dose
- Biologicals
- Biomass
- Biome
- Biomonitoring
- Bioremediation
- Biosensor
- Biosphere
- Biosphere Reserve
- Biostabilizer
- Biota
- Biotechnology
- Biotic
- Biotic Community
- Biotransformation
- Birth Control
- Birth Defects
- Birth Rate
- Blackwater
- Bloc
- Blood Lead Levels
- Blood Products
- Bloom
- BOD5
- Body Burden
- Bog
- Boiler
- Boom
- Borehole
- Botanical Pesticide
- Bottle Bill
- Bottled Water
- Bottom Ash
- Bottom Land Hardwoods
- Bounding Estimate
- Brackish
- Breakpoint Chlorination
- Breakthrough
- Breathing Zone
- Brine Mud
- British Thermal Unit
- Broadcast Application
- Brownfields
- Bubble
- Bubble Policy
- Budget
- Budget Reconciliation
- Budget Resolution
- Buffer
- Buffer Strips
- Building Cooling Load
- Building Envelope
- Building Related Illness
- Bulk Sample
- Bulky Waste
- Burial Ground (Graveyard)
- Buy-Back Center
- By-product
- Bycatch
- Bycatch Reduction Device (Bdr)
C
- Cadmium (Cd)
- Cairo Plan
- Calendar
- Cancellation
- Cancer
- Cap
- Capacity Assurance Plan
- Capillary Action
- Capillary Fringe
- Capture Efficiency
- Carbon Absorber
- Carbon Adsorption
- Carbon Dioxide (Co2)
- Carbon Monoxide (CO)
- Carbon Tax
- Carbon Tetrachloride (CC14)
- Carboxyhemoglobin
- Carcinogen
- Carcinogens
- Carpooling
- Carrier
- Carrying Capacity
- CAS Registration Number
- Case Study
- Cask
- Catalyst
- Catalytic Converter
- Catalytic Incinerator
- Categorical Exclusion
- Categorical Pretreatment Standard
- Cathodic Protection
- Caucus
- Cavitation
- Cells
- Cementitious
- Central Collection Point
- Centrifugal Collector
- CERCLIS
- CFC
- Chamber
- Channelization
- Characteristic
- Characterization Of Ecological Effects
- Characterization Of Exposure
- Check-Valve Tubing Pump
- Chemical Case
- Chemical Compound
- Chemical Element
- Chemical Oxygen Demand (COD)
- Chemical Stressors
- Chemical Treatment
- Chemnet
- Chemosterilant
- Chemtrec
- Child Resistant Packaging (CRP)
- Chiller
- Chilling Effect
- Chisel Plowing
- Chlorinated Hydrocarbons
- Chlorinated Solvent
- Chlorination
- Chlorination Byproducts
- Chlorinator
- Chlorine
- Chlorine-Contact Chamber
- Chlorofluorocarbons (CFCs)
- Chlorophenoxy
- Chlorosis
- Cholinesterase
- Chromium
- Chronic Effect
- Chronic Exposure
- Chronic Toxicity
- Circle Of Influence
- Cistern
- Clarification
- Clarifier
- Class I Area
- Class I Substance
- Class II Substance
- Clay Soil
- Clayoquot Sound
- Clean Coal Technology
- Clean Fuel
- Clean Fuels
- Cleaner Technologies Substitutes Assessment
- Cleanup
- Clear Cut
- Clear Well
- Clearcutting
- Climate Change
- Climate Change (also Referred To As 'global Climate Change')
- Cloning
- Closed-Loop Recycling
- Closure
- Cloture
- Co-fire
- Coagulation
- Coal Cleaning Technology
- Coal Gasification
- Coastal Pelagic
- Coastal Zone
- Code Of Federal Regulations (CFR)
- Coefficient Of Haze (COH)
- Cogeneration
- Coke Oven
- Cold Temperature CO
- Coliform Index
- Coliform Organism
- Collector
- Collector Sewers
- Colloids
- Combined Sewer Overflows
- Combined Sewers
- Combustion
- Combustion Chamber
- Combustion Product
- Command Post
- Command-and-Control Regulations
- Comment Period
- Commercial Extinction
- Commercial Waste
- Commercial Waste Management Facility
- Commingled Recyclables
- Comminuter
- Comminution
- Common Sense Initiative
- Communities Of Color
- Community
- Community Relations
- Community Right-to-know
- Community Water System
- Compact Fluorescent Lamp (CFL)
- Compact Fluorescents
- Compaction
- Comparative Risk Assessment
- Complete Treatment
- Compliance Coal
- Compliance Coating
- Compliance Cycle
- Compliance Monitoring
- Compliance Schedule
- Composite Sample
- Compost
- Composting
- Composting Facilities
- Compressed Natural Gas (CNG)
- Concentration
- Condensate
- Condensate Return System
- Conditional Registration
- Conditionally Exempt Generators (CE)
- Conductance
- Conductivity
- Cone Of Depression
- Cone Of Influence
- Cone Penterometer Testing (CPT)
- Confidential Business Information (CBI)
- Confidential Statement Of Formula (CSF)
- Confined Aquifer
- Confluent Growth
- Congressional Record
- Consent Decree
- Conservation
- Conservation Easement
- Constituent(s) Of Concern
- Construction And Demolition Waste
- Construction Ban
- Consumptive Water Use
- Contact Pesticide
- Contaminant
- Contamination
- Contamination Source Inventory
- Contingency Plan
- Continuous Discharge
- Continuous Sample
- Contour Plowing
- Contour Strip Farming
- Contraceptive
- Contract Labs
- Control Technique Guidelines (CTG)
- Controlled Reaction
- Conventional Filtration
- Conventional Pollutants
- Conventional Site Assessment
- Conventional Systems
- Conventional Tilling
- Conveyance Loss
- Cooling Electricity Use
- Cooling Tower
- Cooperative Agreement
- Core
- Core Program Cooperative Agreement
- Corrective Action
- Corrosion
- Corrosive
- Cost Recovery
- Cost Sharing
- Cost-Effective Alternative
- Cost/Benefit Analysis
- Cover Crop
- Cover Material
- Cradle-to-Grave Or Manifest System
- Creek
- Criteria
- Criteria Pollutants
- Critical Effect
- Critical Mass
- Crop Consumptive Use
- Crop Dusting
- Crop Rotation
- Cross Contamination
- Cross-Connection
- Crumb Rubber
- Cryptosporidium
- Cubic Feet Per Minute (CFM)
- Cullet
- Cultural Eutrophication
- Cultures And Stocks
- Cumulative Ecological Risk Assessment
- Cumulative Exposure
- Cumulative Working Level Months (CWLM)
- Curb Stop
- Curbside Collection
- Cutie-Pie
- Cuttings
- Cyclone Collector
D
- Data Call-In
- Data Quality Objectives (DQOs)
- Day Tank
- DDT
- Dead End
- Deadmen
- Decant
- Decay Products
- Dechlorination
- Decomposition
- Decontamination
- Deep-Well Injection
- Deflocculating Agent
- Defluoridation
- Defoliant
- Degasification
- Degree-Day
- Delegated State
- Delist
- Demand Side Management (Dsm)
- Demand-side Waste Management
- Demersal
- Demineralization
- Denitrification
- Dense Non-Aqueous Phase Liquid (DNAPL)
- Density
- Depletion Curve
- Depressurization
- Dermal Absorption/Penetration
- Dermal Exposure
- Dermal Toxicity
- DES
- Desalination
- Desiccant
- Design Capacity
- Design Value
- Designated Pollutant
- Designated Uses
- Designer Bugs
- Destination Facility
- Destratification
- Destroyed Medical Waste
- Destruction And Removal Efficiency (DRE)
- Destruction Facility
- Desulfurization
- Detectable Leak Rate
- Detection Criterion
- Detection Limit
- Detention Time
- Detergent
- Development
- Development Effects
- Dewater
- Diatomaceous Earth (Diatomite)
- Diazinon
- Dibenzofurans
- Dicofol
- Diesel
- Diesel Engine
- Diffused Air
- Diffusion
- Digester
- Digestion
- Dike
- Diluent
- Dilution Ratio
- Dimictic
- Dinocap
- Dinoseb
- Dioxin
- Direct Discharger
- Direct Filtration
- Direct Push
- Direct Runoff
- Discharge
- Disinfectant
- Disinfectant By-Product
- Disinfectant Time
- Dispersant
- Displacement Savings
- Disposables
- Disposal
- Disposal Facilities
- Dissolved Oxygen (DO)
- Dissolved Solids
- Distillation
- Disturbance
- Diversion
- Diversion Rate
- DNA Hybridization
- Dobson Unit (DU)
- Domestic Application
- Dosage/Dose
- Dose Equivalent
- Dose Rate
- Dose Response
- Dose Response Curve
- Dose-Response Assessment
- Dose-Response Relationship
- Dosimeter
- DOT Reportable Quantity
- Double Hulled Tankers
- Downgradient
- Downstream Processors
- DP Hole
- Draft
- Draft Permit
- Drainage
- Drainage Basin
- Drainage Well
- Drawdown
- Dredge
- Dredging
- Driftnet
- Drilling Fluid
- Drinking Water Equivalent Level
- Drinking Water State Revolving Fund
- Drive Casing
- Drive Point Profiler
- Drop-off
- Dual-Phase Extraction
- Dump
- Dump Sites
- Duplicate
- Dustfall Jar
- Dystrophic Lakes
E
- Ecological Entity
- Ecological Exposure
- Ecological Impact
- Ecological Indicator
- Ecological Integrity
- Ecological Risk Assessment
- Ecological/Environmental Sustainability
- Ecologist
- Ecology
- Economic Poisons
- Ecosphere
- Ecosystem
- Ecosystem Structure
- Ecotone
- Edge Cities
- Efficiency
- Effluent
- Effluent Guidelines
- Effluent Limitation
- Effluent Standard
- Ejector
- Electric Vehicles
- Electrodialysis
- Electromagnetic Geophysical Methods
- Electrostatic Precipitator (ESP)
- Eligible Costs
- EMAP Data
- Emergency (Chemical)
- Emergency And Hazardous Chemical Inventory
- Emergency Episode
- Emergency Exemption
- Emergency Removal Action
- Emergency Response Values
- Emergency Suspension
- Emission
- Emission Cap
- Emission Factor
- Emission Inventory
- Emission Standard
- Emissions Cap
- Emissions Trading
- Emulsifier
- Encapsulation
- Enclosure
- End User
- End-of-the-pipe
- End-use Product
- Endangered Species
- Endangerment Assessment
- Endocrine Disruptors
- Endrin
- Energy Conservation
- Energy Efficiency
- Energy Management System
- Energy Recovery
- Enforceable Requirements
- Enforcement
- Enforcement Decision Document (EDD)
- Engineered Controls
- Enhanced Inspection And Maintenance (I&M)
- Enrichment
- Enrolled Bill
- Entrain
- Environment
- Environmental Assessment
- Environmental Audit
- Environmental Equity/Justice
- Environmental Exposure
- Environmental Fate
- Environmental Fate Data
- Environmental Impact Statement
- Environmental Indicator
- Environmental Justice
- Environmental Lien
- Environmental Medium
- Environmental Monitoring For Public Access And Community Tracking
- Environmental Response Team
- Environmental Site Assessment
- Environmental Sustainability
- Environmental Tobacco Smoke
- Environmental/Ecological Risk
- Epidemiology
- Epilimnion
- Episode (Pollution)
- Equilibrium
- Equity
- Equivalent Method
- Erosion
- Established Treatment Technologies
- Estimated Environmental Concentration
- Estuary
- Ethanol
- Ethylene Dibromide (EDB)
- Eugenics
- Eutrophic Lakes
- Eutrophication
- Evaporation Ponds
- Evapotranspiration
- Everglades
- Exceedance
- Exclusion
- Exclusionary Ordinance
- Executive Session
- Exempt Solvent
- Exempted Aquifer
- Exemption
- Exotic Species
- Experimental Use Permit
- Explosive Limits
- Exports
- Exposure
- Exposure Assessment
- Exposure Concentration
- Exposure Indicator
- Exposure Level
- Exposure Pathway
- Exposure Route
- Exposure-Response Relationship
- Extraction Procedure (EP Toxic)
- Extraction Well
- Extremely Hazardous Substances
- Exurbia
F
- Fabric Filter
- Facilities Plans
- Facility Emergency Coordinator
- Factory Farming
- Factory Ships
- Facultative Bacteria
- Family Planning
- Fauna
- Feasibility Study
- Fecal Coliform Bacteria
- Federal Implementation Plan
- Federal Land
- Federal Motor Vehicle Control Program
- Feedlot
- Feedlots
- Fen
- Ferrous Metals
- Fertility
- Fertility Rates
- FIFRA Pesticide Ingredient
- Fill
- Filling
- Filter Strip
- Filtration
- Financial Assurance For Closure
- Finding Of No Significant Impact
- Finished Water
- First Draw
- Fiscal Year
- Fisheries
- Fissile Material
- Fission
- Fix A Sample
- Fixed-Location Monitoring
- Flammable
- Flare
- Flash Point
- Floc
- Flocculation
- Floodplain
- Floor Sweep
- Flora
- Florida Bay
- Flow Rate
- Flowable
- Flowmeter
- Flue Gas
- Flue Gas Desulfurization
- Fluidized
- Fluidized Bed Incinerator
- Flume
- Fluoridation
- Fluorides
- Fluorocarbons (FCs)
- Flush
- Flux
- Fly Ash
- Fogging
- Food Chain
- Food Processing Waste
- Food Waste
- Food Web
- Forest Certification
- Forests
- Formaldehyde
- Formulation
- Fossil Fuel
- Fracture
- Free Product
- Freeboard
- Fresh Kills
- Fresh Water
- Friable
- Friable Asbestos
- Fuel Economy Standard
- Fuel Efficiency
- Fuel Switching
- Fugitive Emissions
- Fume
- Fumigant
- Functional Equivalent
- Fungicide
- Fungistat
- Fungus (Fungi)
- Furrow Irrigation
- Future Liability
G
- Game Fish
- Garbage
- Gas
- Gas Chromatograph/Mass Spectrometer
- Gasahol
- Gasification
- Gasoline
- Gasoline Volatility
- General Permit
- General Reporting Facility
- Generally Recognized As Safe (GRAS)
- Generator
- Genetic Engineering
- Genotoxic
- Geographic Information System (GIS)
- Geological Log
- Geophysical Log
- Geothermal
- Geothermal/Ground Source Heat Pump
- Germicide
- Giardia Lamblia
- Gillnets
- Glass Containers
- Global Warming
- Global Warming Potential
- Glovebag
- Golden Carrot
- Gooseneck
- Grab Sample
- Grain Loading
- Granular Activated Carbon Treatment
- Grasscycling
- Grassed Waterway
- Grassroots
- Gray Water
- Grazing
- Green Design
- Greenhouse
- Greenhouse Effect
- Greenhouse Gas
- Greenway
- Grinder Pump
- Gross Alpha/Beta Particle Activity
- Gross Power-Generation Potential
- Ground Cover
- Ground Water
- Ground Water Under The Direct Influence (UDI) Of Surface Water
- Ground-Penetrating Radar
- Ground-Water Discharge
- Ground-Water Disinfection Rule
- Groundfish
- Groundwater
- Growth Overfishing
- Gully Erosion
H
- Habitat
- Habitat Indicator
- Half-Life
- Halogen
- Halon
- Hammer Mill
- Hard Water
- Harpooning
- Hauler
- Hazard
- Hazard Assessment
- Hazard Communication Standard
- Hazard Evaluation
- Hazard Identification
- Hazard Quotient
- Hazard Ratio
- Hazardous Air Pollutants
- Hazardous Chemical
- Hazardous Ranking System
- Hazardous Substance
- Hazardous Waste
- Hazardous Waste Landfill
- Hazardous Waste Minimization
- Hazards Analysis
- Hazards Identification
- Haze
- Headspace
- Health Advisory Level
- Health Assessment
- Hearings
- Heat Island Effect
- Heat Pump
- Heavy Metals
- Heptachlor
- Herbicide
- Herbivore
- Heterotrophic Organisms
- High End Exposure (dose) Estimate
- High Intensity Discharge
- High Seas
- High-Density Polyethylene
- High-Level Nuclear Waste Facility
- High-Level Radioactive Waste (HLRW)
- High-Line Jumpers
- High-Risk Community
- High-to-Low-Dose Extrapolation
- Highest Dose Tested
- Highly Migratory Fish
- Holding Pond
- Holding Time
- Hollow Stem Auger Drilling
- Homeowner Water System
- Homogeneous Area
- Hood Capture Efficiency
- Host
- Household Hazardous Waste
- Household Hazards
- Household Waste (Domestic Waste)
- Human Equivalent Dose
- Human Exposure Evaluation
- Human Health Risk
- Hydraulic Conductivity
- Hydraulic Gradient
- Hydrocarbons (HC)
- Hydroelectric
- Hydrofluorocarbons
- Hydrogen Sulfide (H2S)
- Hydrogeological Cycle
- Hydrogeology
- Hydrologic Cycle
- Hydrology
- Hydrolysis
- Hydronic
- Hydrophilic
- Hydrophobic
- Hydropneumatic
- Hydropower
- Hypersensitivity Diseases
- Hypolimnion
- Hypoxia
- Hypoxia/Hypoxic Waters
I
- ICPD
- Identification Code Or EPA I.D. Number
- Ignitable
- IM240
- Imhoff Cone
- Immediately Dangerous To Life And Health (IDLH)
- Imminent Hazard
- Imminent Threat
- Immiscibility
- Impermeable
- Imports
- Impoundment
- In Situ
- In Vitro
- In Vivo
- In-Line Filtration
- In-Situ Flushing
- In-Situ Oxidation
- In-Situ Stripping
- In-Situ Vitrification
- Incident Command Post
- Incident Command System (ICS)
- Incineration
- Incineration At Sea
- Incinerator
- Incinerators
- Incompatible Waste
- Indemnification
- Indicator
- Indirect Discharge
- Indirect Source
- Indoor Air
- Indoor Air Pollution
- Indoor Climate
- Industrial Pollution Prevention
- Industrial Process Waste
- Industrial Sludge
- Industrial Source Reduction
- Industrial Waste
- Industrialized Countries
- Inert Ingredient
- Inertial Separator
- Infectious Agent
- Infectious Waste
- Infiltration
- Infiltration Gallery
- Infiltration Rate
- Inflow
- Influent
- Information Collection Request (ICR)
- Information File
- Inhalable Particles
- Initial Compliance Period (Water)
- Injection Well
- Injection Zone
- Innovative Technologies
- Innovative Treatment Technologies
- Inoculum
- Inorganic Chemicals
- Insecticide
- Insecticides
- Inspection And Maintenance (I/M)
- Institutional Waste
- Instream Use
- Integrated Exposure Assessment
- Integrated Pest Management (IPM)
- Integrated Waste Management
- Interceptor Sewers
- Interface
- Interfacial Tension
- Interim (Permit) Status
- Internal Dose
- International Conference On Population And Development
- International Planned Parenthood Federation (Ippf)
- Interstate Carrier Water Supply
- Interstate Commerce Clause
- Interstate Waters
- Interstitial Monitoring
- Intrastate Product
- Inventory (TSCA)
- Inversion
- Ion
- Ion Exchange Treatment
- Ionization Chamber
- Ionizing Radiation
- IRIS
- Irradiated Food
- Irradiation
- Irreversible Effect
- Irrigation
- Irrigation Efficiency
- Irrigation Return Flow
- Irritant
- Isoconcentration
- Isopleth
- Isotope
- Isotropy
J
K
L
- Laboratory Animal Studies
- Lagoon
- Lakes
- Land Application
- Land Ban
- Land Disposal Restrictions
- Land Farming (of Waste)
- Land Use
- Landfill
- Landfills
- Landings
- Landscape
- Landscape Characterization
- Landscape Ecology
- Landscape Indicator
- Langelier Index (LI)
- Large Quantity Generator
- Large Water System
- Laser Induced Fluorescence
- Latency
- Lateral Sewers
- Laundering Weir
- Law
- LC 50/Lethal Concentration
- LD 50/ Lethal Dose
- Ldlo
- Leachate
- Leachate Collection System
- Leaching
- Lead
- Lead (Pb)
- Lead Poisoning
- Lead Service Line
- Least-cost Planning
- Legionella
- Lethal Concentration 50
- Lethal Dose 50
- Leukemia
- Level Of Concern (LOC)
- Life Cycle Assessment
- Life Cycle Of A Product
- Lifetime Average Daily Dose
- Lifetime Exposure
- Lift
- Lifting Station
- Light Non-Aqueous Phase Liquid (LNAPL)
- Light Pollution
- Light-Emitting Diode
- Limestone Scrubbing
- Limit Of Detection (LOD)
- Limited Degradation
- Limiting Factor
- Limnology
- Lindane
- Liner
- Lipid Solubility
- Liquefaction
- Liquid Injection Incinerator
- List
- Listed Waste
- Lithology
- Litter
- Littoral Zone
- Local Education Agency (LEA)
- Local Emergency Planning Committee (LEPC)
- Logging
- Longlines
- Low Density Polyethylene (LOPE)
- Low Emissivity (low-E) Windows
- Low NOx Burners
- Low-emission Vehicles
- Low-impact Camping
- Low-Level Radioactive Waste (LLRW)
- Lower Detection Limit
- Lower Explosive Limit (LEL)
- Lowest Acceptable Daily Dose
- Lowest Achievable Emission Rate
- Lowest Observed Adverse Effect Level (LOAEL)
- Lumber
- Lung Diseases
- Lymphoma
M
- Macropores
- Magnetic Separation
- Major Modification
- Major Stationary Sources
- Majority Leader
- Majors
- Malthusian
- Mammal
- Man-Made (Anthropogenic) Beta Particle And Photon Emitters
- Managed Growth
- Management Plan
- Managerial Controls
- Manatee
- Mandatory Recycling
- Manifest
- Manifest System
- Manual Separation
- Manufacturer's Formulation
- Manufacturing Use Product
- Marbled Murrelet
- Margin Of Exposure (MOE)
- Margin Of Safety
- Marine Mammal
- Marine Sanitation Device
- Mark-up
- Marsh
- Mass Transit
- Material Category
- Material Safety Data Sheet (MSDS)
- Material Type
- Materials Recovery Facility (MRF)
- Maximally (or Most) Exposed Individual
- Maximum Acceptable Toxic Concentration
- Maximum Available Control Technology (MACT)
- Maximum Contaminant Level
- Maximum Contaminant Level Goal (MCLG)
- Maximum Exposure Range
- Maximum Residue Level
- Maximum Tolerated Dose
- Measure Of Effect/ Measurement Endpoint
- Measure Of Exposure
- Mechanical Aeration
- Mechanical Separation
- Mechanical Turbulence
- Medfly
- Media
- Medical Surveillance
- Medical Waste
- Medium-size Water System
- Megalopolis
- Meniscus
- Mercury (Hg)
- Mesotrophic
- Metabolites
- Metalimnion
- Methane
- Methanol
- Method 18
- Method 24
- Method 25
- Method Detection Limit (MDL)
- Methoxychlor
- Methyl Bromide
- Methyl Orange Alkalinity
- Microbial Growth
- Microbial Pesticide
- Microclimate
- Microenvironmental Method
- Microenvironments
- Million-Gallons Per Day (MGD)
- Minimization
- Mining
- Mining Of An Aquifer
- Mining Waste
- Minor Source
- Minority Leader
- Minors
- Minuteman
- Miscellaneous ACM
- Miscellaneous Materials
- Miscible Liquids
- Missed Detection
- Mist
- Mitigation
- Mixed Funding
- Mixed Glass
- Mixed Liquor
- Mixed Metals
- Mixed Municipal Waste
- Mixed Paper
- Mixed Plastic
- Mobile Incinerator Systems
- Mobile Source
- Model Plant
- Modified Bin Method
- Modified Source
- Moisture Content
- Molecule
- Molten Salt Reactor
- Monitoring
- Monitoring Well
- Monoclonal Antibodies (Also Called MABs And MCAs)
- Monomictic
- Montreal Protocol
- Moratorium
- Morbidity
- Mortality
- Most Probable Number
- Muck Soils
- Mudballs
- Mulch
- Multi-Media Approach
- Multiple Chemical Sensitivity
- Multiple Use
- Multistage Remote Sensing
- Municipal Discharge
- Municipal Sewage
- Municipal Sludge
- Municipal Solid Waste
- Mutagen/Mutagenicity
N
- National Ambient Air Quality Standards (NAAQS)
- National Emissions Standards For Hazardous Air Pollutants (NESHAPS)
- National Environmental Performance Partnership Agreements
- National Estuary Program
- National Municipal Plan
- National Oil And Hazardous Substances Contingency Plan (NOHSCP/NCP)
- National Pollutant Discharge Elimination System (NPDES)
- National Priorities List (NPL)
- National Recreation Areas
- National Response Center
- National Response Team (NRT)
- National Secondary Drinking Water Regulations
- Navigable Waters
- Necrosis
- Negotiations (Under Superfund)
- Nematocide
- Nephelometric
- Netting
- Neutralization
- New Source
- New Source Performance Standards (NSPS)
- New Source Review (NSR)
- Nitrate
- Nitric Oxide (NO)
- Nitrification
- Nitrilotriacetic Acid (NTA)
- Nitrite
- Nitrogen Dioxide (NO2)
- Nitrogen Oxide (NOx)
- Nitrogen Oxides
- Nitrogenous Wastes
- Nitrophenols
- No Further Remedial Action Planned
- No Observable Adverse Effect Level (NOAEL)
- No Till
- No-Observed-Effect-Level (NOEL)
- Noble Metal
- Noise
- Noise Pollution
- Non-Aqueous Phase Liquid (NAPL)
- Non-Attainment Area
- Non-Binding Allocations Of Responsibility (NBAR)
- Non-Community Water System
- Non-Compliance Coal
- Non-Contact Cooling Water
- Non-Conventional Pollutant
- Non-Degradation
- Non-Ferrous Metals
- Non-ionizing Electromagnetic Radiation
- Non-Methane Hydrocarbon (NMHC)
- Non-Methane Organic Gases (NMOG)
- Non-Point Sources
- Non-potable
- Non-Road Emissions
- Non-Transient Non-Community Water System
- Nondischarging Treatment Plant
- Nonfriable Asbestos-Containing Materials
- Nonhazardous Industrial Waste
- Notice Of Deficiency
- Notice Of Intent To Cancel
- Notice Of Intent To Deny
- Notice Of Intent To Suspend
- Nuclear Energy
- Nuclear Power
- Nuclear Reactor
- Nuclear Reactors And Support Facilities
- Nuclear Tests
- Nuclear Winter
- Nuclide
- Nutrient
- Nutrient Pollution
O
- Oceanography
- Oil
- Oil Spills
- Old Growth Forests
- Omnibus Spending Bill
- Over-development
- Over-fishing
- Over-grazing
- Ozone
- Ozone Depletion
- Ozone Hole
P
- Packaging
- Packed Bed Scrubber
- Packed Tower
- Packer
- Palatable Water
- Pandemic
- Paper
- Paper Mills
- Paper Processor/Plastics Processor
- Paper Products
- Parameter
- Paraquat
- Parshall Flume
- Part A Permit, Part B Permit
- Participation Rate
- Particle Count
- Particulate
- Particulate Loading
- Particulate Pollution
- Particulates
- Partition Coefficient
- Parts Per Billion (ppb)/Parts Per Million (ppm)
- Passive Smoking/Secondhand Smoke
- Passive Solar
- Passive Treatment Walls
- Pathogens
- Pathway
- Pay-As-You-Throw/Unit-Based Pricing
- Peak Electricity Demand
- Peak Levels
- Pelagic Species
- Percent Saturatiuon
- Perched Water
- Percolating Water
- Percolation
- Performance Bond
- Performance Data (For Incinerators)
- Performance Standards
- Periphyton
- Permeability
- Permissible Dose
- Permissible Exposure Limit
- Permit
- Persistence
- Persistent Pesticides
- Personal Air Samples
- Personal Measurement
- Personal Protective Equipment
- Pest
- Pest Control Operator
- Pesticide
- Pesticide Regulation Notice
- Pesticide Tolerance
- Pesticides
- PETE (Polyethylene Terepthalate)
- Petroleum
- Petroleum Derivatives
- PH
- Pharmacokinetics
- Phenolphthalein Alkalinity
- Phenols
- Phosphates
- Phosphogypsum Piles (Stacks)
- Phosphorus
- Phosphorus Plants
- Photochemical Oxidants
- Photochemical Smog
- Photosynthesis
- Physical And Chemical Treatment
- Phytoplankton
- Phytoremediation
- Phytotoxic
- Phytotreatment
- Picocuries Per Liter PCi/L)
- Piezometer
- Pilot Tests
- Plankton
- Plasma-Arc Reactor
- Plasmid
- Plastics
- Plate Tower Scrubber
- Plug Flow
- Plugging
- Plume
- Plutonium
- PM-10/PM-2.5
- PM10
- Pneumoconiosis
- Point Source
- Point-of-Contact Measurement Of Exposure
- Point-of-Disinfectant Application
- Point-of-Use Treatment Device
- Poison
- Poison Runoff
- Pollen
- Pollutant
- Pollutant Pathways
- Pollutant Standard Index (PSI)
- Polluted Runoff
- Pollution
- Pollution Prevention
- Polonium
- Polychlorinated Biphenyls
- Polyelectrolytes
- Polymer
- Polyvinyl Chloride (PVC)
- Population
- Population At Risk
- Porosity
- Portal-of-Entry Effect
- Post Consumer Waste
- Post-Chlorination
- Post-Closure
- Post-Consumer Materials/Waste
- Post-Consumer Recycling
- Potable Water
- Potential Dose
- Potentially Responsible Party (PRP)
- Potentiation
- Potentiometric Surface
- Power Plants
- Pre-Consumer Materials/Waste
- Pre-Harvest Interval
- Precautionary Principle
- Prechlorination
- Precipitate
- Precipitation
- Precipitator
- Precursor
- Preliminary Assessment
- Prescriptive
- Pressed Wood Products
- Pressure Sewers
- Pressure, Static
- Pressure, Total
- Pressure, Velocity
- Pretreatment
- Prevalent Level Samples
- Prevalent Levels
- Prevention Of Significant Deterioration (PSD)
- Primacy
- Primary Drinking Water Regulation
- Primary Effect
- Primary Standards
- Primary Treatment
- Primary Waste Treatment
- Principal Organic Hazardous Constituents (POHCs)
- Prions
- Prior Appropriation
- Probability Of Detection
- Process Variable
- Process Verification
- Process Wastewater
- Process Weight
- Producers
- Product Level
- Product Water
- Products Of Incomplete Combustion (PICs)
- Project XL
- Propellant
- Proportionate Mortality Ratio (PMR)
- Proposed Plan
- Proteins
- Protocol
- Protoplast
- Protozoa
- Public Comment Period
- Public Estate
- Public Health
- Public Health Approach
- Public Health Context
- Public Hearing
- Public Land
- Public Notice
- Public Transportation
- Public Water System
- Publicly Owned Treatment Works (POTWs)
- Pulp
- Pumping Station
- Pumping Test
- Purging
- Putrefaction
- Putrescible
- Pyrolysis
Q
R
- Radiation
- Radiation Standards
- Radio Frequency Radiation
- Radioactive
- Radioactive Decay
- Radioactive Substances
- Radioactive Waste
- Radioactivity
- Radioisotopes
- Radionuclide
- Radius Of Influence
- Radius Of Vulnerability Zone
- Radon
- Radon Daughters/Radon Progeny
- Radon Decay Products
- Rainbow Report
- Rainforest
- Ranking Member
- Rasp
- Raw Agricultural Commodity
- Raw Sewage
- Raw Water
- Re-entry
- Reactivity
- Reaeration
- Real-Time Monitoring
- Reasonable Further Progress
- Reasonable Maximum Exposure
- Reasonable Worst Case
- Reasonably Available Control Measures (RACM)
- Reasonably Available Control Technology (RACT)
- Recarbonization
- Receiving Waters
- Receptor
- Recess
- Recharge
- Recharge Area
- Recharge Rate
- Reclamation
- Recombinant Bacteria
- Recombinant DNA
- Recommended Maximum Contaminant Level (RMCL)
- Reconstructed Source
- Reconstruction Of Dose
- Record Of Decision (ROD)
- Recovery Rate
- Recycle/Reuse
- Recycling
- Recycling And Reuse Business Assistance Centers
- Recycling Economic Development Advocates
- Recycling Mill
- Recycling Technical Assistance Partnership National Network
- Red Bag Waste
- Red Border
- Red Tide
- Redemption Program
- Reduce
- Reduction
- Reentry Interval
- Reference Dose (RfD)
- Reformulated Gasoline
- Refrigerants
- Refueling Emissions
- Refuse
- Refuse Reclamation
- Regeneration
- Regional Response Team (RRT)
- Registrant
- Registration
- Registration Standards
- Regulated Asbestos-Containing Material (RACM)
- Regulated Medical Waste
- Relative Ecological Sustainability
- Relative Permeability
- Relative Risk Assessment
- Release
- Remedial Action (RA)
- Remedial Design
- Remedial Investigation
- Remedial Project Manager (RPM)
- Remedial Response
- Remediation
- Remote Sensing
- Removal Action
- Renewable Energy
- Renewable Energy Production Incentive (REPI)
- Repeat Compliance Period
- Reportable Quantity (RQ)
- Repowering
- Representative Sample
- Reregistration
- Reserve Capacity
- Reservoir
- Residential Use
- Residential Waste
- Residual
- Residual Risk
- Residual Saturation
- Residue
- Resistance
- Resolution
- Resource Recovery
- Response Action
- Responsiveness Summary
- Restoration
- Restricted Entry Interval
- Restricted Use
- Restriction Enzymes
- Retrofit
- Reuse
- Reverse Osmosis
- Reversible Effect
- Ribonucleic Acid (RNA)
- Rider
- Rill
- Ringlemann Chart
- Riparian
- Riparian Habitat
- Riparian Rights
- Risk
- Risk (Adverse) For Endangered Species
- Risk Assessment
- Risk Characterization
- Risk Communication
- Risk Estimate
- Risk Factor
- Risk For Non-Endangered Species
- Risk Management
- Risk-based Targeting
- Risk-Specific Dose
- River Basin
- Rodenticide
- Rotary Kiln Incinerator
- Rough Fish
- Route Of Exposure
- Rubbish
- Run-Off
- Running Losses
S
- Sacrifical Anode
- Safe
- Safe Water
- Safe Yield
- Safener
- Sagebrush Rebellion
- Salinity
- Salt Water Intrusion
- Salts
- Salvage
- Salvage Logging
- Sampling Frequency
- Sanctions
- Sand Filters
- Sanitary Landfill
- Sanitary Sewers
- Sanitary Survey
- Sanitary Water (Also Known As Gray Water)
- Sanitation
- Saprolite
- Saprophytes
- Saturated Zone
- Saturation
- Science Advisory Board (SAB)
- Scrap
- Scrap Metal Processor
- Screening
- Screening Risk Assessment
- Scrubber
- Second-growth Forests
- Secondary Drinking Water Regulations
- Secondary Effect
- Secondary Materials
- Secondary Standards
- Secondary Treatment
- Secure Chemical Landfill
- Secure Maximum Contaminant Level
- Sediment
- Sediment Yield
- Sedimentation
- Sedimentation Tanks
- Sediments
- Seed Protectant
- Seepage
- Selective Pesticide
- Semi-Confined Aquifer
- Semivolatile Organic Compounds
- Senescence
- Septic System
- Septic Tank
- Serp (Super Efficient Refrigerator Program)
- Service Connector
- Service Line Sample
- Service Pipe
- Set-Back
- Settleable Solids
- Settling Chamber
- Settling Tank
- Sewage
- Sewage Lagoon
- Sewage Sludge
- Sewer
- Sewerage
- Shading Coefficient
- Sharps
- Shock Load
- Short-Circuiting
- Sick Building Syndrome
- Signal
- Signal Words
- Significant Deterioration
- Significant Municipal Facilities
- Significant Non-Compliance
- Significant Potential Source Of Contamination
- Significant Violations
- Silos
- Silt
- Silviculture
- Single-Breath Canister
- Sink
- Sinking
- Sip (State Implementation Plan)
- SIP Call
- Site
- Site Assessment Program
- Site Inspection
- Site Safety Plan
- Siting
- Skimming
- Slbm (Submarine Launched Ballistic Missile)
- Slow Sand Filtration
- Sludge
- Sludge Digester
- Slurry
- Small Quantity Generator (SQG-sometimes Referred To As "Squeegee")
- Smelter
- Smog
- Smoke
- Soft Detergents
- Soft Water
- Soil Adsorption Field
- Soil And Water Conservation Practices
- Soil Conditioner
- Soil Erodibility
- Soil Gas
- Soil Moisture
- Soil Sterilant
- Solar Energy
- Solder
- Sole-Source Aquifer
- Solid Waste
- Solid Waste Disposal
- Solid Waste Management
- Solidification And Stabilization
- Solubility
- Soot
- Sorption
- Source Area
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