2012 Nutrient Management Tables for Ontario Regulation 267/03 Made under the Nutrient Management Act, 2002

Table 3. NASM Odour Category Table

OC 1 - NASM that are less than 500 odour units

  • Leaf and yard waste, including leaf and yard waste that has been composted but does not meet the requirements for Category AA or A compost in Part II of the Compost Standards or the criteria in subsection 1(1.1) of this regulation.
  • Washwater, including materials containing food-grade cleaners, from cleaning the equipment and processing area of,
    • a bakery,
    • a confectionery processing facility,
    • a cereal and grain processing facility,
    • a snack food manufacturing facility, or
    • a brewery or distillery
  • Fruit and vegetable processing water that contains no chemicals other than food-grade chemicals
  • Liquid anaerobically digested sewage biosolids from a municipal sewage treatment plant or its off-site storage facility
  • Compost that meets the requirements for Category B compost in Part II of the Compost Standards

OC 2 - NASM that are equal to or greater than 500 odour units but less than 1500 odour units

  • Culled fruit and vegetables, including cole crops and onions that have been processed
  • Peels and pomace produced from fruits and vegetables, including cole crops and onions
  • Organic waste matter that contains no meat or fish and is derived from food processing at,
    • a bakery,
    • a confectionery processing facility,
    • a cereal and grain processing facility,
    • a snack food manufacturing facility, or
    • a brewery or distillery
  • Washwater, including materials containing food-grade cleaners, from cleaning the equipment and processing area of a fish processing facility 
  • Cooked pet food manufacturing waste
  • Pulp and paper biosolids that are primary or combined solids
  • Liquid aerobically digested sewage biosolids from a municipal sewage treatment plant or its off-site storage facility
  • Washwater, including materials containing food-grade cleaners, from cleaning the equipment and processing area of a facility for processing,
    • meat,
    • eggs, or
    • dairy products
  • Paunch manure
  • Organic waste matter derived from the production of biodiesel
  • Sewage biosolids which have been dewatered by means other than a centrifuge operated at more than 2000 revolutions per minute (rpm)and stored less than 30 days after dewatering is completed1.

OC 3 - NASM that are equal to or greater than 1500 odour units but less than 4500 odour units

  • Organic waste matter from grease traps and interceptors
  • Organic waste matter produced in a dissolved air flotation process used for the treatment of wastewater from food and feed processing or preparation facilities
  • Waste products from animal feeds listed in Classes 1, 2, 3, 4 and 5 of Part 1 of Schedule IV to the Feeds Regulations, 1983 (SOR/83-593) made under the Feeds Act (Canada) that may contain an animal product
  • Organic waste matter from the processing of fish
  • Sewage biosolids which have been dewatered by a centrifuge operated at 2000 or higher revolutions per minute (rpm)
  • Sewage biosolids which have been dewatered and stored for 30 days or more after the dewatering process is completed

1 It is recognized that the rpm of centrifuge is not the only contributing factor to odour. Centrifuges operated to produce high shear forces will produce more odourous cake.


For more information:
Toll Free: 1-877-424-1300
E-mail: ag.info.omafra@ontario.ca
Author: OMAFRA Staff
Creation Date: 25 July 2012
Last Reviewed: 25 July 2012