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Some links on this page are pointers to other hosts and locations on the Internet.  This information is provided as a service; however, the Indiana Department of Environmental Management does not endorse, approve or otherwise support these sites.

N

AcronymAcronym MeaningAdditional Information
N/ANot Available
N/ANot Applicable
neEffective Porosity
N2ONitrous Oxide
NAU.S. National Archives Exit IDEM
NANonattainment
NAANonattainment Area
NAAECNorth American Agreement on Environmental Cooperation Exit IDEM
NAAQMNational Ambient Air Quality Monitoring Exit IDEM
NAAQSNational Ambient Air Quality Standards Exit IDEM
NACANational Agricultural Chemicals Association Exit IDEM
NACEPTNational Advisory Council for Environmental Policy and Technology
NACWANational Association of Clean Water Agencies Exit IDEM
NAFSMANational Association of Flood & Stormwater Management Agencies Exit IDEM
NALMNorth American Lake Management
NALMSNorth American Lake Management Society Exit IDEM
NAMANational Air Monitoring Audits
NAMSNational Air Monitoring Stations Exit IDEM
NAPAPNational Acid Precipitation Assessment Program Exit IDEM
NAPD/NTNNational Atmospheric Deposition Program/National Trends Network Exit IDEM
NAPLNon-Aqueous Phase Liquid
NAPSNational Air Pollution Surveillance Exit IDEM
NARNational Asbetos Registry
NARANational Agrichemical Retailers Association
NARANational Air Resources Act
NARAU.S. National Archives and Record Administration Exit IDEM
NARTSONorth American Research Strategy for Tropospheric Ozone Exit IDEM
NASNational Academy of Sciences Exit IDEM
NASDANational Association of State Departments of Agriculture Exit IDEM
NATICHNational Air Toxics Information Clearinghouse Exit IDEM
NCAMPNational Coalition Against the Misuse of Pesticides Exit IDEM
NCEANational Center for Environmental Assessment Exit IDEM
NCEPINational Center for Environmental Publications and Information Exit IDEM
NCPNational Contigency Plan
NCWSNon-Community Water System
NEDRESNational Environmental Data Referral Service (NOAA) Exit IDEM
NEDSNational Emissions Data System
NEERINational Environmental Engineering Research Institute Exit IDEM
NEHANational Environmental Health Association Exit IDEM
NEPANational Environmental Policy Act Exit IDEM
NEPINational Environmental Policy Institute Exit IDEM
NEPPSNational Environmental Performance Partnership System Exit IDEM
NESHAPNational Emission Standard for Hazardous Air Pollutants Exit IDEM
NESHTANational Environmental, Safety, and Health Training Organization Exit IDEM
NETNational Environmental Testing
NETANational Environmental Training Association Exit IDEM
NFANo Further Action
NFRAPNo Further Remedial Action Planned
NGFU.S. EPA National Functional Guidelines for Organic and Inorganic Data Review
NGVDNational Geodetic Vertical Datum
NGWANational Ground Water Association Exit IDEM
NICTNational Incident Coordination Team
NIEHSNational Institute for Environmental Health Sciences Exit IDEM
NIMBYNot In My Backyard
NIOSHNational Institute of Occupational Safety and Health Exit IDEM
NIRPCNorthwest Indiana Regional Plan Commission Exit IDEM
NISACNational Industrial Security Advisory Committee
NISTNational Institute of Standards and Technology Exit IDEM
NLMNational Library of Medicine
NMFSNational Marine Fisheries Service Exit IDEM
NMHCNonmethane Hydrocarbons
NMOCNon-Methane Organic Component
NMSWLFNon-Municipal Solid Waste Landfill Facility
NMVOCNon-methane Volatile Organic Chemicals
NONitric Oxide
NOANotice of Arrival
NOAANational Oceanographic and Atmospheric Agency Exit IDEM
NOACNature of Action Code
NOAELNo Observable Adverse Effect Level
NODNotice of Decision
NODNotice of Deficiency
NODNatural Oxygen Demand
NOELNo Observable Effect Level
NOINotice of Intent
NOICNotice of Intent to Cancel
NOISNotice of Intent to Suspend
NonMSWLFNon-Municipal Solid Waste Landfill Facility
NOPHNotice of Public Hearing
NORNotice of Receipt
NORMNaturally Occurring Radioactive Material
NOVNotice of Violation
NOxNitrogen Oxides
NPCANational Pest Control Association Exit IDEM
NPDNonrule Policy Document
NPDESNational Pollutant Discharge Elimination System (Federal) Exit IDEM
NPDESNational Pollutant Discharge Elimination System (State)
NPDWRNational Primary Drinking Water Regulation Exit IDEM
NPHAPNational Pesticide Hazard Assessment Program
NPIRSNational Pesticide Information Retrieval System Exit IDEM
NPLNational Priorities List Exit IDEM
NPMPNational Pesticide Monitoring Program
NPPRNational Pollution Prevention Roundtable Exit IDEM
NPSU.S. National Park Service Exit IDEM
NPSNonpoint Source
NPTNNational Pesticide Telecommunications Network Exit IDEM
NRCNational Recycling Coalition Exit IDEM
NRCNational Response Center
NRCU.S. Nuclear Regulatory Commission Exit IDEM
NRCSNatural Resources Conservation Service Exit IDEM
NRDNatural Resource Damage Exit IDEM
NRDANational Recourse Damage Assessment
NRDCNatural Resources Defense Council Exit IDEM
NRMDNational Resources Management Division
NRONorthern Regional Office
NRWANational Rural Water Association
NSDWRNational Secondary Drinking Water Regulations Exit IDEM
NSECNational System for Emergency Coordination
NSEPNational System for Emergency Preparedness
NSMPNational Soils Monitoring Program
NSPENational Society for Professional Engineers Exit IDEM
NSPSNew Source Performance Standards Exit IDEM
NSRNew Source Review
NSWMANational Solid Waste Management Association Exit IDEM
NTINational Toxics Inventory
NTISNational Technical Information Service Exit IDEM
NTNCWSNon-Transient Non-Community Water System
NTPNational Toxicology Program Exit IDEM
NTUnephelometric turbidity units Exit IDEM
NWNorthwest
NWANational Water Alliance
NWFNational Wildlife Federation Exit IDEM
NWRONorthwest Regional Office
NWSNational Weather Service Exit IDEM

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