Wee and poo are a LOT different to lead, chlorine and fluoride! If I had my time over I would absolutely filter the bath water for my newborn baby too. Chlorine ruins your body's flora. A newborn baby is trying to establish gut flora. The two are not compatible. Mum's poo and wee are naturally occurring and assist in creating that gut flora.

Can you birth in your bore water Sara? The idea of birthing in mineral rich spring water sounds like perfection to me. Water as nature made it, not how humans ruined it!