The T-value in the PBT index refers to acute toxicity.
Terbutaline is reaching the aquatic environment, but the concentrations found in Sweden are not expected to be high enough to provide environmental impact. However, good studies on environmental effects are lacking.
The risk classification insignificant, according to Fass.se, is based on total sold amount (kg) of the substance in Sweden during the year 2015 and the toxicity of the substance.
Author: Health and Medical Care Administration, Region Stockholm