Amendments to the Phosphorus Concentration Regulations (SOR/89-501) will come into effect on July 1, 2010. These amendments lower the concentration of phosphorus permitted in household laundry detergent and dishwashing compound to not more than 1.1% by weight expressed as phosphorus pentoxide or .5% by weight expressed as elemental phosphorus. The amendments also introduce equivalent limits for other household cleaning products. Concentrations for commercial or industrial detergent remains at 5% expressed as phosphorus pentoxide and 2.2% expressed as elemental phosphorus, by weight. The concentrations must be determined by an accredited laboratory and manufacturers and importers must maintain records confirming compliance for five years. See Canada Gazette, June 28, 2009.