diff --git a/src/troute-nwm/src/nwm_routing/output.py b/src/troute-nwm/src/nwm_routing/output.py
index 824e79129..9d46886de 100644
--- a/src/troute-nwm/src/nwm_routing/output.py
+++ b/src/troute-nwm/src/nwm_routing/output.py
@@ -70,7 +70,7 @@ def _parquet_output_format_converter(df, start_datetime, dt, configuration, pref
     # Prepare the location_id with prefix
     df.index.name = 'location_id'
     df.reset_index(inplace=True)
-    location_ids = prefix_ids + '-' + df['location_id'].astype(str)
+    location_ids = prefix_ids + df['location_id'].astype(str)
 
     # Flatten the dataframe using NumPy
     num_locations = df.shape[0]