"In 2007, TTB relaxed the US absinthe ban, and approved several brands for sale.[63] These brands must pass TTB testing, which is performed by the Gas Chromatography-Mass Spectrometry method[64] and TTB considers a product to be thujone-free if the FDA’s test measures less than 10ppm (equal to 10mg/kg) thujone.[65] A US distillery also began producing and selling absinthe, the first US company to do so since 1912. [66]"
-per wiki with links to FDA regulations. no wormwood in the us.
The stuff you have probably has southern wormwood and not grande wormwood.