Is this from our WATER TANKS or BILGES ? [E5]

After some time living on Squalo we inspected the water tanks and what we found was not at all impressive. I wish we had done that sooner. We couldn't believe we were drinking such filthy water! Maria authorities has asked us to move. Apart from the sea trial when we were shown the boat, we didn't really have a chance to manoeuvre her ourselves. It is known that, being a long fin keel boat reversing can be tricky, she can decide to go wherever she feels like on the day. You just have to go with it :) Although we didn't go too far, see how it went for us.