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DISCLAIMER 
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.
| Acronym | Acronym Meaning | Additional Information |
|---|---|---|
| I&M | Vehicle Inspection & Maintenance | |
| I/A | Innovative/Alternative | |
| I/M | Inspection/Maintenance | |
| I/SW | Industrial/Special Waste (IDEM) | |
| IA | Integrated Assessment | |
| IA | Interagency Agreement | |
| IAAC | Interagency Assessment Advisory Committee | |
| IAC | Indiana Administrative Code | |
| IACT | Indiana Association of Cities and Towns | |
| IADN | Integrated Atmospheric Deposition Network | |
| IAEA | International Atomic Energy Agency | |
| IAG | Interagency Agreement | |
| IAP | Incentive Awards Program | |
| IAP | Indoor Air Pollution | |
| IAQ | Indoor Air Quality | |
| IARC | International Agency for Research on Cancer | |
| IATDB | Interim Air Toxics Data Base | |
| IBSIN | Innovations in Building Sustainable Industries | |
| IBT | Industrial Biotest Laboratory | |
| IC | Indiana Code | |
| IC | Internal Combustion | |
| ICAIR | Interdisciplinary Planning and Information Research | |
| ICAP | Inductively Coupled Argon Plasma | |
| ICB | Information Collection Budget | |
| ICBN | International Commission on the Biological Effects of Noise | |
| ICCP | International Climate Change Partnership | |
| ICE | Internal Combustion Engine | |
| ICE | Industrial Combustion Emissions Model | |
| ICFAR | Indiana Center for Advance Research, Inc. | |
| ICP | Inductively Coupled Plasma | |
| ICR | Information Collection Request | |
| ICRE | Ignitability, Corrosivity, Reactivity, Extraction | |
| ICRP | International Commission on Radiological Protection | |
| ICRU | International Commission on Radiation Units and Measurements | |
| ICS | Intermittent Control System | |
| ICS | Intermittent Control Strategies | |
| ICS | Institute for Chemical Studies | |
| ICs | Institutional Controls | |
| ICS | Incident Command System | |
| ICWM | Institute for Chemical Waste Management | |
| ID | Inner Diameter | |
| IDEM | Indiana Department of Environmental Management | |
| IDETS | Indiana Department of Employee Training Services | |
| IDHS | Indiana Department of Homeland Security | |
| IDLH | Immediately Dangerous to Life and Health | |
| IDNR | Indiana Department of Natural Resources | |
| IEB | International Environment Bureau | |
| IEHA | Indiana Environmental Health Association | |
| IEI | Indiana Environmental Institute | |
| IEMP | Integrated Environmental Management Project | |
| IERC | Indiana Emergency Response Commission | |
| IERC | Indiana Emergency Response Coordination | |
| IES | Institute for Environmental Studies | |
| IESA | Electronic Subscriber Agreement | |
| IFB | Invitation for Bid | |
| IFCAM | Industrial Fuel Choice Analysis Model | |
| IFCS | Intergovernmental Forum on Chemical Safety | |
| IFES | Indiana Forum Environmental Safety | |
| IFIS | Indiana Facility Information System | |
| IFIS | Industry File Information System | |
| IFMO | Indiana Fire Marshall Office | |
| IFMS | Integrated Financial Management System | |
| IFPP | Industrial Fugitive Process Particulate | |
| IFRS | Indiana Facility Registry System (IDEM) | |
| IG | Indiana Geologists | |
| IGCC | Integrated Gasification Combined Cycle | |
| IGCI | Industrial Gas Cleaning Institute | |
| IGCN | Indiana Government Center North | |
| IGCS | Indiana Government Center South | |
| IGIC | Indiana Geographic Information Council | |
| IGISI | Indiana Geographic Information System Initiative | |
| IGS | Indiana Geological Survey | |
| IINERT | In-Place Inactivation and Natural Restoration Technologies | |
| IIOA | Indiana Industrial Operators Association | |
| IIS | Inflationary Impact Statement | |
| IJC | International Joint Commission (on Great Lakes) | |
| IKE | Improving Kids’ Environment | |
| IMA | Indiana Manufacturers’ Association | |
| IMM | Intersection Midblock Model | |
| IMPACT | Integrated Model of Plumes and Atmosphere in Complex Terrain | |
| IMPROVE | Interagency Monitoring of Protected Visual Environment | |
| IN | Indiana | |
| IN | Incinerator | |
| INAAP | Indiana Army Ammunition Plant | |
| INAWDAC | International Agency Water Data Committee | |
| INDOT | Indiana Department of Transportation | |
| INPUFF | Gaussian Puff Dispersion Model | |
| INT | Intermittent | |
| IOB | Iron Ore Beneficiation | |
| IOC | Inorganic Chemicals | |
| IOSHA | Indiana Occupational Safety and Health Administration | |
| IOU | Input/Output Unit | |
| IP | Inhalable Particles | |
| IPCC | Intergovernmental Panel on Climate Change | |
| IPCS | International Program on Chemical Safety | |
| IPECA | Indiana Petroleum Equipment Contractors Association | |
| IPM | Inhalable Particulate Matter | |
| IPM | Integrated Pest Management | |
| IPM | Integrated Pest Management | |
| IPP | Inter-media Priority Pollutant (document) | |
| IPP | Independent Power Producer | |
| IPP | Integrated Plotting Package | |
| IPP | Implementation Planning Program | |
| IR | Indiana Register | IDEM's Guide for Citizen Participation |
| IRATS | Indiana RCRA Activity Tracking System | |
| IRG | Interagency Review Group | |
| IRIS | Integrated Risk Information System | |
| IRIS | Instructional Resources Information System | |
| IRLG | Interagency Regulatory Liaison Group (Composed of EPA, CPSC, FDA, and OSHA) | |
| IRM | Intermediate Remedial Measures | |
| IRMC | Inter-Regulatory Risk Management Council | |
| IRP | Installation Restoration Program | |
| IRPTC | International Register of Potentially Toxic Chemicals | |
| IRR | Institute of Resource Recovery | |
| IRRF | Indianapolis Resource Recovery Facility | |
| IRS | International Referral Systems | |
| IS | Interim Status | |
| ISAM | Indexed Sequential File Access Method | |
| ISBH | Indiana State Board of Health (Department of Health) | |
| ISBN | International Standard Book Number | |
| ISC | Industrial Source Complex | |
| ISCL | Interim Status Compliance Letter | |
| ISCLT | Industrial Source Complex Long Term Model | |
| ISCO | In-Situ Chemical Oxidation | |
| ISCST | Industrial Source Complex Short Term Model | |
| ISD | Interim Status Document | |
| ISDH | Indiana State Department Health | Board of Health  |
| ISE | Ion-specific electrode | |
| ISM | Indiana Scoring Model | |
| ISMAP | Indirect Source Model for Air Pollution | |
| ISO | International Organization for Standardization | |
| ISO | International Standard Organization | |
| ISPF | (IBM) Interactive System Productivity Facility | |
| ISPLS | Indiana Society of Professional Land Surveyors | |
| ISS | Interim Status Standards | |
| I-STEPS | Indiana State Emissions Processing System | |
| IT | Information Technology | |
| ITC | Interagency Testing Committee | |
| ITC | Innovative Technology Council | |
| ITRC | Interstate Technology Regulatory Coordination | |
| ITRC | Interstate Technology Regulating Commission | |
| ITRD | Innovative Treatment Remediation Demonstration | |
| IUP | Intended Use Plan | |
| IUR | Inventory Update Rule | |
| IW | Industrial Waste (IDEM) | |
| IWC | In-Stream Waste Concentration | |
| IWEA | Indiana Water Environment Association | |
| IWPCA | Indiana Water Pollution Control Association | |
| IWPP | Industrial Wastewater Pretreatment Permits | |
| IWRA | Indiana Water Resources Association | |
| IWRA | Indiana Water Resources Association | |
| IWS | Ionizing Wet Scrubber |
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