Update app.py

app.py

@@ -400,7 +400,15 @@ class AccurateAirQualityMapper:
             })
         
         df = pd.DataFrame(table_data)
-        return df.sort_values('AQI', ascending=False)
+        
+        # Convert AQI column to numeric for proper sorting, keeping 'N/A' as 0
+        df['AQI_numeric'] = pd.to_numeric(df['AQI'], errors='coerce').fillna(0)
+        
+        # Sort by AQI (air quality first, then meteorological)
+        df_sorted = df.sort_values(['AQI_numeric', 'Parameter'], ascending=[False, True])
+        
+        # Drop the helper column
+        return df_sorted.drop('AQI_numeric', axis=1)
 
 # Initialize mapper
 mapper = AccurateAirQualityMapper()