Ignitable
Capable of burning or causing a fire.

Incineration
The destruction of solid, liquid, or gaseous wastes by controlled burning at high temperatures.

Incinerator
A furnace for burning waste under controlled conditions.

Indoor Air Pollution
Chemical, physical, or biological contaminants in indoor air.

Indoor Air
The breathing air inside a habitable structure or conveyance.

Industrial Waste
Unwanted materials from an industrial operation; may be liquid, sludge, solid, or hazardous waste.

Inertial Separator
A device that uses centrifugal force to separate waste particles.

Inorganic Chemicals
Chemical substances of mineral origin, not of basically carbon structure.

Insecticide
A pesticide compound specifically used to kill or prevent the growth of insects.

Integrated Waste Management
Using a variety of practices to handle municipal solid waste; can include source reduction, recycling, incineration, and land filling.

Inversion
A layer of warm air preventing the rise of cooling air and pollutants trapped beneath it. Can cause an air pollution episode.

IPC
Integrated Pollution Control.

IPPC
Integrated Pollution Prevention and Control

IR
Infrared.

ISO
International Standards Organisation.

Isokinetic Sampling
Sampling velocity equal to local gas velocity.