Shower being the top hygiene priority, never changes its importance. As you were asking, a good shower filter is mandatory especially in certain areas where the contaminations are a too much.
These are harmful for hair and skin. Good quality shower should not be compromised in my opinion. Setup a good shower room, consider good shower products (check http://behindtheshower.com ), for your shower.
A well begun day is very important. And everyone deserves it!