[1]NELHA also administers a small site, 4 acres (1.6 ha), in Puna on the eastern side of the Island of Hawaii for geothermal research.

Its administration offices are located in the HOST Park Keahole Point in the North Kona District.

The main administration office is in the 4 acre research campus at the end of the road along the coastline on Keahole Point.

The adjacent Science and Technology Park was merged into the facility, expanding it to 877 acres (355 ha).

[4] In 2002, 50 acres (20 ha) were leased to a commercial company which filters and bottles the water for sale in Japan.