Searched for http://www.calwater.com/your_district/index.php?District=ela&Zip=&Submit=Click+to+show+your+district 
Note: This calendar view maps the number of captures of http://www.calwater.com/your_district/index.php?District=ela&Zip=&Submit=Click+to+show+your+district, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.