I have clear pictures of bub making her exit underwater so I know the water was clear then (I didn't poop during labour/birth) but then remember noticing the water pretty murky after DH cut the cord. I didn't tear, but bub had pooped in transit, and I didn't birth the placenta until out of the bath. So I guess it must have been bleeding after the birth like Alan said, that made it murky. Hadn't really thought about that part of it until this thread!