diff --git a/main.py b/main.py
index 6ebe104..c7a2de8 100644
--- a/main.py
+++ b/main.py
@@ -19,7 +19,9 @@ CACHE_MAX_SIZE = 100
 POLLEN_MAX_INDEX = 12.0
 POLLEN_PERCENTAGE_SCALE = 100
 HTTP_TIMEOUT = 10.0
-DEFAULT_ZIP_CODE = "01970"  # salem, ma
+
+# Location constants
+DEFAULT_ZIP_CODE = "01970"  # Salem, MA
 DEFAULT_LATITUDE = "42.3554334"
 DEFAULT_LONGITUDE = "-71.060511"