The first time I noticed it, I didn't realise it was "famous" - and it was on the cover of Ally Condie's Atlantia:
Human Voices Wake Us,
And We Drown
however I'm currently about halfway through The Fault in Our Stars by John Green and lead female character Hazel has been quoting the whole poem and when she used the lines mentioned above I got googling.
So I've learnt something. Plus I knew Val McDermid had borrowed the title The Mermaids Singing from Eliot but I hadn't realised it was this poem.