The flip side of churches with an unreported web presence is those church sites, as congregations report to the Unitarian Universalist Association for uua.org, that no longer exist. But that's not the same as saying they don't have one.
Seven congregational websites have thrown a 404 or other error on three occasions in recent days, and have never worked. In two cases, it was as simple as the servers don't support secure HTTPS, but use HTTP. One letter difference. I found Facebook pages for others. That leaves two congregations unaccounted for.
Website on recond,Congregation,City,State,Use this one
"http://uufellowship. homestead.com/ UUFellowship.html",UU Fellowship of Porterville Inc.,Porterville,CA,https://www.facebook.com/ pages /Unitarian-Universalist-Fellowship-of-Porterville/ 162339087121352
http://macomb.com/~uuf,UU Fellowship of Macomb ,Macomb,IL,
http://www.uubrockton.org/,UU Church ,Brockton,MA,http://uubrockton.com/
"http://www.uuum.org/ 567683",UU Congregation at First Church in Roxbury,Roxbury,MA,
https://www.littlefallsuu.org/,St Paul's Universalist Church,Little Falls,NY,http://www.littlefallsuu.org/
http://www.nfuuf.org/,North Fork UU Fellowship,Jamesport,NY,https://www.facebook.com/ pages /North-Fork-Unitarian-Universalist-Fellowship-NFUUF /89653344099
https://www.newriveruu.org/,New River UU Fellowship,Beckley,WV,http://www.newriveruu.org/