diff --git a/caimira/apps/calculator/form_data.py b/caimira/apps/calculator/form_data.py
index 73974dc0..dd122664 100644
--- a/caimira/apps/calculator/form_data.py
+++ b/caimira/apps/calculator/form_data.py
@@ -347,12 +347,6 @@ def infected_present_interval(self) -> models.Interval:
             breaks=breaks,
         )
 
-    def population_present_interval(self) -> models.Interval:
-        state_change_times = set(self.infected_present_interval().transition_times())
-        state_change_times.update(self.exposed_present_interval().transition_times())
-        all_state_changes = sorted(state_change_times)
-        return models.SpecificInterval(tuple(zip(all_state_changes[:-1], all_state_changes[1:])))
-
     def exposed_present_interval(self) -> models.Interval:
         if self.specific_breaks != {}: # It means the breaks are specific and not predefined
             breaks = self.generate_specific_break_times(breaks_dict=self.specific_breaks, target='exposed')