According to Hawaii News Now, a sample from the stream, located in the town of Waipio on the island of Oahu, showed "as much as 1.2 per cent of the water was alcohol" and "about .04 per cent of its content" was sugar.
Paradise Beverages does not yet know what caused the alcohol spill and is working with local authorities to figure it out.
"Right now, we've had the Department of Transportation come in with their representatives and we're dealing with them and we've also been contacted by the Department of Health," said Anthony Rowe, the company's director of operations, quoted by Hawaii News Now.
"It may be coming from us so that's why we're working with the proper authorities."