diff --git a/src/Model/Pollutants/Pollutants.py b/src/Model/Pollutants/Pollutants.py
index 958a0d49e7a2043e3670ffd8c84afb9456888067..f2ca9e60dfa20fbf1f2b0653b660e4b950c8b5e6 100644
--- a/src/Model/Pollutants/Pollutants.py
+++ b/src/Model/Pollutants/Pollutants.py
@@ -47,6 +47,8 @@ class Pollutants(SQLSubModel):
         self._name = str(name)
         self._enabled = True
 
+        self._characteristics = []
+
         Pollutants._id_cnt = max(
             Pollutants._id_cnt + 1, self.id)
 
@@ -69,6 +71,22 @@ class Pollutants(SQLSubModel):
           )
         """)
 
+        execute("""
+          CREATE TABLE Pollutants_characteristics(
+            id INTEGER NOT NULL PRIMARY KEY,
+            type INTEGER NOT NULL,
+            diametre REAL NOT NULL,
+            rho REAL NOT NULL,
+            porosity REAL NOT NULL,
+            cdc_riv REAL NOT NULL,
+            cdc_cas REAL NOT NULL,
+            apd REAL NOT NULL,
+            ac REAL NOT NULL,
+            bc REAL NOT NULL,
+            FOREIGN KEY(pollutant) REFERENCES Pollutants(id)
+          )
+        """)
+
         return cls._create_submodel(execute)
 
     @classmethod
@@ -96,12 +114,28 @@ class Pollutants(SQLSubModel):
                     status=status
                 )
 
+                new_data = []
+                table = execute(
+                    "SELECT * " +
+                    "FROM Pollutants_characteristics " +
+                    f"WHERE pollutant = {id}"
+                )
+
+                if table is not None:
+                    for t in table:
+                        new_data.append(t)
+
+                new_pollutant._characteristics = new_data
+
                 new.append(new_pollutant)
 
         return new
 
     def _db_save(self, execute, data=None):
 
+        execute(f"DELETE FROM Pollutants WHERE id = {self.id}")
+        execute(f"DELETE FROM Pollutants_characteristics WHERE pollutant = {self.id}")
+
         sql = (
             "INSERT INTO " +
             "Pollutants(id, name " +
@@ -113,6 +147,16 @@ class Pollutants(SQLSubModel):
 
         execute(sql)
 
+        for d in self._characteristics:
+            sql = (
+                "INSERT INTO " +
+                "Pollutants_characteristics(type, diametre, rho, porosity, " +
+                "cdc_riv, cdc_cas, apd, ac, bc) " +
+                f"VALUES ({d[1]}, {d[2]}, {d[3]},{d[4]}, {d[5]}, "
+                f"{d[6]}, {d[7]}, {d[8]}, {d[9]}, {self.id})"
+            )
+            execute(sql)
+
         return True
 
     @property