2009 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 completed

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

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.

Note: This table, which may be amended from time to time, is to be used in conjunction with the NASM Odour Guide, dated February 23, 2011 and prepared by the Ministry of Agriculture, Food and Rural Affairs and the Ministry of the Environment for the purposes of the Regulation.


For more information:
Toll Free: 1-877-424-1300
E-mail: ag.info.omafra@ontario.ca
Author: OMAFRA Staff
Creation Date: 14 September 2009
Last Reviewed: 14 September 2009