Short of getting an extremely good quality water filter for your home, you still end up showering in it even if you change your regular drinking water.

We ought to have discussions about this on this sub.

One article I've just read suggests that an activated carbon filter can remove some phthalates, but not necessarily all. A nano-filtration system would be more expensive but also more effective. Carbon filters, at least, are commonly available for showerheads.

When you think about it, that's going to make its way into the foods you consume as well.

Growing your own food and raising livestock could mitigate this, unless phthalates can make their way into rainwater (which I can't find any information on).

Eating organic food could also help reduce some exposure.