If it is labeled "Hatch" it should be from that area. I think you are thinking of Chimayo chile. It comes from the village of Chimayo in Northern New Mexico. Their peppers are great and I think their red chile is the best you can buy. The flavor of the red has a unique earthiness to it rendering the best red chile sauces I've ever tasted.
Here's a link to the powder....you won't regret it.
http://www.chimayotogo.com/pc-67-7-rancho-de-chimayo-red-chile-powder-579.aspx
The green peppers from Chimayo are similar to the Sandia peppers you can get from Hatch (they are the hot ones, the medium to mild are the NuMex Big Jim peppers).