Can organic kale just be rinsed?

I'm making some baby food for my 8-month-old using organic kale that we got at Whole Foods. I've read that it's best to wash in a sink full of cold water to get it completely clean, but our sink doesn't have a stopper at the moment, so I just rinsed the leaves off as best I could. Should that be sufficient? Just want to make sure I'm not giving my baby anything potentially harmful!