New/Updated Screening Levels for the Air Contaminants Benchmarks (ACB) List

On April 27, 2018 the MECP expanded and updated the screening levels on the Air Contaminants Benchmarks (ACB) list from some 1,300 contaminants to over 4,500 contaminants.

The list is a reference tool used by the government and the regulated community to assess air contaminants for their potential to cause adverse effects including compliance under s.9 of the EPA and O. Reg. 419.

For more information on checking your compliance status with these new standards please contact:  Fardia Dehghan, ext. 110, fdehghan[at]