How deep could a human swim with SCUBA apparatus?
As far as I can find the current world record for "scuba" diving is 1,090 ft 4.5 in set in 2014.

The previous record was 1,044 ft set in 2005 so (as with most human endurance &amp; physical achievement records nowadays) we're most likely at the limit of the possible there.

Barring a few more feet (or even just inches) of course.

Howsoever, that's only normal scuba diving equipment

Deep diving using hydrox and trimix has reached depths of 1,644 ft (1977) &amp; 1,752 ft (1988).

So the answer depends on if you're asking about with normal commercial scuba gear using bog standard compressed air or if you want to include breathing mixes etc to help alleviate the bends.