Industrial categorization criteria *
CategoryOutputsScaleProcessOperation /IntensityPossible examples **
Class I
  • Noise: Sound not audible off property
  • Dust and/or Odour: Infrequent and not intense
  • Vibration: No ground borne vibration on plant property
  • No outside storage
  • Small scale plant or scale is irrelevant in relation to all other criteria for this Class
  • Self contained plant or building which produces/stores a packaged product. Low probability of fugitive emissions
  • Daytime operations only
  • Infrequent movement of products and/or heavy trucks
  • Electronics manufacturing and repair
  • Furniture repair and refinishing
  • Beverages bottling
  • Auto parts supply
  • Packaging and crafting services
  • Distribution of dairy products
  • Laundry and linen supply
Class II
  • Noise: Sound occasionally audible off property
  • Dust and/or Odour: Frequent and occasionally intense
  • Vibration: Possible groundborne vibration, but cannot be perceived off property
  • Outside storage permitted
  • Medium level of production allowed
  • Open process
  • Periodic outputs of minor annoyance
  • Low probability of fugitive emissions
  • Shift operations permitted
  • Frequent movement of products and/or heavy trucks with the majority of movements during daytime hours
  • Magazine printing
  • Paint spray booths
  • Metal command
  • Electrical production manufacturing
  • Manufacturing of dairy products
  • Dry cleaning services
  • Feed packing plant
Class III
  • Noise: sound frequently audible off property
  • Dust and/or Odour: Persistent and/or intense
  • Vibration: Ground-borne vibration can frequently be perceived off property
  • Outside storage of raw and finished products
  • Large production levels
  • Open process
  • Frequent outputs of major annoyances
  • High probability of fugitive emissions
  • Continuous movement of products and employees
  • Daily shift operations permitted
  • Manufacturing of paint and varnish
  • Organic chemicals manufacturing
  • Breweries
  • Solvent recovery plants
  • Soaps and detergent manufacturing
  • Manufacturing of resins and costing
  • Metal manufacturing

Note: Emissions may be point source or fugitive.

* Note: This Table should not be considered a comprehensive list but is to be used to provide examples of industrial categories.

** Note: The following examples are not limited to the Class indicated on the Table. The categorization of a particular industry will vary with the specifics of the case.

Source: The criteria for categorizing industries into Class I, II or III are derived from Ministry experience and the investigation of complaints related to industrial facilities.