This shampoo does not lather well in hard water, but it doesn't mean it isn't working! We took it camping and it lathered very well, but at our house where we have hard water we get about a quarter of the lather a normal shampoo would have. This is because it has no foaming agents (SLS, etc) in it. It still cleanses your hair and scalp though! This shampoo works great for my psoriasis. It used to be really red, scaly and extremely itchy.