Hi Roy,

Great question! Here's TerViva's response to questions about pongamia as an invasive species:

Pongamia has been in Hawaii for 150 years, and has not become a "Noxious Pest" or "Noxious Weed" according to Hawaii Dept of Ag.

UH has assessed pongamia's risk potential for invasiveness, and given pongamia a WRA (weed risk assessment) score of 7. That is not on a scale of 1-10, it is a limitless scale, with higher scores being undesirable. 
Here are some other WRA scores for contrast: 
Sunflower (Maui plantings) WRA: 10.5
Eucalyptus (hamakua coast) WRA: 11
Jatropha (Big Island trials) WRA: 17
Castor (pervasive around the islands) WRA: 21

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