5df75927_r_Batch_7___Environment_Canada__Response
[Comment] There is a lack of environmental media monitoring data and mandatory reporting of environmental isophorone levels to arrive at a meaningful conclusion. [Response] 
There is recent Canadian data on isophorone levels in drinking water, indoor air and agricultural soil, and this information has been incorporated in the final screening assessment.
Summary of Public Comments received on the Challenge substance Isophorone (CAS 78-59-1) Draft Screening Assessment Report for Batch 7 - Environment Canada
Response