Aldon Smith Being Transferred to Substance Abuse Facility

NFL star Aldon Smith is being transferred from county jail to an inpatient substance abuse facility after officials say his blood alcohol level registered at .40.

TMZ Sports spoke with San Francisco District Attorney spokesperson Alex Bastian who said Smith is currently being moved. We're told the facility is located in California. Officials believe Smith clearly suffers from alcoholism.

No word on how long Smith is expected to stay in the facility. His next court hearing is May 3.

As we previously reported, Smith was arrested on domestic violence charges stemming from a March 3 incident with his then-fiancee.

As part of his bail, the judge ordered Smith to stay completely sober and wear a SCRAM alcohol monitoring device.

But, things went sideways last Friday when the device showed his B.A.C. was at .40 ... which is an alarmingly high number. In fact, many studies show a .40 could lead to a coma or even death.