I found this:

"The fleet of balloons are designed to stay in the air for 150 days at a stretch, and the record for one of Loon's balloons has been 223 days in flight. The company hopes to increase the longevity further by improving the control systems to avoid high-speed stratospheric winds. The project has backing from international banks, tech firms, and a major telecommunications company. It still needs approval from Peru's Ministry of Transport and Communications, and the hope is to begin providing service in 2020."

In the segment just prior to the segment covering the LOON story, toward the end of the article about Martian development mediated with biological extraction of iron.

Thanks!