I use a filter and salt in my home for filteration, but I water my girls with the well water that is unfiltered from the outside faucet. Actually the other day I fed them with some lake water. I would say go ahead and use it and then you will find out if you get any symptoms. I think you will be ok. You can also have your water tested to know exactly what's in it. I don't think you need it, but the info that you will get from the test can only help you.