diff --git a/R/whatNWISData.r b/R/whatNWISData.r
index 8c15573495ec7d8d729d963452ef67a3af4f3ce5..eb15e93ed3abdded98143f57155790b9729ae59f 100644
--- a/R/whatNWISData.r
+++ b/R/whatNWISData.r
@@ -77,6 +77,7 @@ whatNWISdata <- function(siteNumbers,service="all",parameterCd="all",statCd="all
   
   comment(SiteFile) <- headerInfo
   attr(SiteFile, "url") <- urlSitefile
+  attr(SiteFile, "queryTime") <- Sys.time()
   
   return(SiteFile)