diff --git a/waternsw_grabber/waternsw_grabber.py b/waternsw_grabber/waternsw_grabber.py
index 5bb1959..4d10ab9 100644
--- a/waternsw_grabber/waternsw_grabber.py
+++ b/waternsw_grabber/waternsw_grabber.py
@@ -464,15 +464,27 @@ def extract_records(input_dir, output_dir, clean_up=False):
         # Get basin ID
         basin_code = sites.loc[bore_id, 'Basin code']
 
+        # Make copy of original dataframe
+        df_all = df.copy()
+
+        # Get quality columns
+        q_idx = ['Quality' in col for col in df.columns]
+
         # Resample if necessary
         for period in periods:
             if period == 'daily':
                 # Resample to daily timestamps
-                df = df.resample('1d').mean()
+                df = df_all.resample('1d').mean()
+                # Get first quality code for each period, as mean doesn't work
+                q_val = df_all.loc[:, q_idx].resample('1d').first()
+                df.loc[:, q_idx] = q_val
 
             elif period == 'weekly':
                 # Resample to weekly timestamps
-                df = df.resample('1w').mean()
+                df = df_all.resample('1w').mean()
+                # Get first quality code for each period, as mean doesn't work
+                q_val = df_all.loc[:, q_idx].resample('1w').first()
+                df.loc[:, q_idx] = q_val
 
             # Add specific borehole details
             df['Site'] = sites.loc[bore_id, 'Site']