AA Adverse action; advices of allowance; assistant administrator; associate administrator; atomic absorption
ABLES Adult Blood Lead Epidemiology and Surveillance
ACGIH American Conference of Governmental Industrial Hygienists
ACSM American Congress on Surveying and Mapping
AAEE American Academy of Environmental Engineers
AAPCO American Association of Pesticide Control Officials
AATSR Advanced Along Track Scanning Radiometer
ABEL EPA’s computer model for analyzing a violator’s ability to pay a civil penalty
ABES Alliance for Balanced Environmental Solutions
ABWR Advanced Boiling Water Reactor
AC Actual commitment; advisory circular, alternating current
A&C Abatement and control
A-C Asbestos-cement
ACA American Conservation Association
ACAQ Advisory Committee on Air Quality
ACAVC Advisory Committee on Agricultural and Veterinary Chemicals
ACE Alliance for Clean Energy
ACEEE American Council for an Energy Efficient Economy
ACER Advisory Committee on Environmental Resources
ACL Alternate concentration limit; analytical chemistry laboratory
ACM Asbestos containing material, Association for Computing Machinery
ACP Agricultural control program (water quality management)
ACQUIRE Aquatic Information Retrieval
ACS American Chemical Society
ACSM American Congress of Survey and Mapping
ACT Action
ACVEN Advisory Committee on Vehicle Emissions and Noise
ACWA American Clean Water Association
ADABA Acceptable data base
ADAMAS Aquatic Database Management System
ADB Applications data base
ADI Acceptable daily intake
ADMATCH Address Matching Software (GIS)
ADP Automated data processing
ADQ Audits of data quality
ADR Alternate dispute resolution
ADT Abstract Data Type
AEA Atomic Energy Act
AEC Associate Enforcement Counsels, Atomic Energy Commission
AEE Alliance for Environmental Education
AEERL Air and Energy Engineering Laboratory
AERE Association of Environmental and Resource Economists
AERP Aquatic Effects Research Program
AES Auger electron Spectrometry
AFOS Automation of field operations and services
AGA American Gas Association
AH Allowance holders
AHC Animal Health Committee
AHERA Asbestos Hazard Emergency Response Act
AI Aggressiveness Index, artificial intelligence
AIEE American Institute of Electrical Engineers
AIHA American Industrial Hygiene Association
AIHC American Industrial Health Council
AIR RISC Air Risk Information Support Center
AIRS Aerometric Information Retrieval System
AIS Address information system (GIS) , automated information security
AL Acceptable level; action level
ALT Altimeter, altitude
ALARA As low as reasonably achievable
ALJ Administrative law judge
ALMS Atomic line molecule spectroscopy
AMCL Alternate maximum contaminant level
AMD Acid mine drainage
AMEDAS Automated Meteorological Data Acquisition System
AMPS Automatic mapping and planning system
AMS Automated meteorological station
AMSA Association of Metropolitan Sewer Agencies
AMWA Association of Metropolitan Water Administrators
ANC Acid neutralizing capacity
ANPR Advanced notice of proposed rulemaking
ANSI American National Standards Institute
AOC Abnormal operating conditions; assimilable organic carbon; Army Operations Center, Pentagon
AOML Atlantic Oceanographic and Meteorological Laboratory
APA Administrative procedures act
APDS Automated procurement documentation system
APF Assigned protection factor
APHA American Public Health Association
API American Petroleum Institute
APTIC Air Pollution Technical Information Center
APWA American Public Works Association
AQ7 Non-reactive pollutant modeling
AQA Approved quality assurance
AQCDs Air quality criteria documents
AQS Air quality subsystem
ARA Assistant regional administrator; associate regional administrator
ARAR Applicable or relevant and appropriate standards, limitations, criteria, and requirements
ARC American Red Cross
ARCC American Rivers Conservation Council
AREAL Atomospheric Research and Exposure Assessment Laboratory
ARES Amateur Radio Emergency Services
ARRL American Radio Relay League
ARWO Aerial reconnaissance weather officer
ASCE American Society of Civil Engineers
ASCII American Standard Code for Information Interchange
ASDWA Association of State Drinking Water Administrators
ASIWCPA Association of State and International Water Pollution Control Administrators
ASF Atmospheric stabilization framework
ASHAA Asbestos School Hazard Abatement Act
ASHARA Asbestos School Hazard Abatement Reauthorization Act
ASHTO Association of State and Territorial Health Officers
ASL Above sea level
ASLE American Society of Lubrication engineers
ASMD Atmospheric Sciences Modeling Division
ASME American Society of Mechanical Engineers
ASOS Automated surface observing systems
ASPRS American Society for Photogrammetry & Remote Sensing
ASSE Association of State Sanitary Engineers
AST Advanced secondary [wastewater] treatment
ASM American Society for Microbiology
ASTM American Society for Testing and Materials
ATF Automatic transmission fluid
ATSDR Agency for Toxic Substances and Disease Registry
ASTER Assessment tools for the evaluation of risk
ATSR Along track scanning radiometer
ATT Alpha-1-antiryspin
ATTIC Alternative Technology Treatment Information Center
AVHRR Advanced Very High Resolution Radiometer (satellite system)
AWIPS Advanced Weather Interactive Processing System
A/WPR Air/water pollution report
AWRA American Water Resources Association
AWT Advanced wastewater treatment
AWWA American Water Works Association
AWWARF American Water Works Association Research Foundation