@Isewein In rivers about that depth, I've seen clear waters, especially in tropical or low-pollution regions.
I'd just like to point out there is not a single outhouse in Hommlet - this may have some implications for that river...
Really? In a river approximately five meters deep, you can see all the way to the ground? I'm impressed by the cleanliness of your areas, then. Unthinkable here in England. Anyway, I'm glad my nitpicking brought out Sitra Achara's comedy gold comment.