The data on hazard and risk are based on previous environmental information on Fass.se. Environmental information is missing on fass.se (2019-03-11). It is voluntary for manufacturers to provide information about environmental impact on fass.se.
In Scientific discussion for Siklos (hydroxycarbamide) from 2014, https://www.ema.europa.eu/en/documents/scientific-discussion/siklos-epar-scientific-discussion_en.pdf: "The environmental risk assessment (ERA) has been calculated, and the PEC value is less than 0.01ug/l. Siklos is unlikely to represent a risk for the environment following its prescribed usage. No phase II environmental effect analysis has been submitted for this marketing authorization."
Author: Health and Medical Care Administration, Region Stockholm