diff --git a/apps/enp/views.py b/apps/enp/views.py
index eed9f4f9..2b5e0782 100644
--- a/apps/enp/views.py
+++ b/apps/enp/views.py
@@ -20,7 +20,7 @@ class DrainViewSet(CustomModelViewSet):
     """
     queryset = Drain.objects.all()
     serializer_class = DrainSerializer
-    filterset_fields = ['type', 'cate', 'mgroup']
+    filterset_fields = ['type', 'cate', 'mgroup', 'level']
     select_related_fields = ['mgroup']
 
     def get_serializer_class(self):