diff --git a/waternsw_grabber/waternsw_grabber.py b/waternsw_grabber/waternsw_grabber.py
index 5102c06..8f73f2d 100644
--- a/waternsw_grabber/waternsw_grabber.py
+++ b/waternsw_grabber/waternsw_grabber.py
@@ -9,6 +9,7 @@ import shutil
 import logging
 import warnings
 import requests
+import numpy as np
 import pandas as pd
 from tqdm import tqdm
 from selenium import webdriver
@@ -299,7 +300,10 @@ def extract_definitions(input_dir, output_dir):
         site_data = meta['Sites:'][0]
         lat = float(re.search(r'(?<=Lat:)\S+', site_data).group())
         lon = float(re.search(r'(?<=Long:)\S+', site_data).group())
-        elev = float(re.search(r'(?<=Elev:).+(?=m)', site_data).group())
+        try:
+            elev = float(re.search(r'(?<=Elev:).+(?=m)', site_data).group())
+        except AttributeError:
+            elev = np.nan
         address = re.search(r'(?<=\d\.\d\.\d - ).+(?=\sLat)',
                             site_data).group()
         bore_id = re.search(r'^\S+', site_data).group()