Some Hatch chiles are mild with heat levels on the Scoville scale similar to the Anaheim or poblano peppers around 1,000 – 1,500 Scoville heat units (SHU) others can meet the heat of a serrano 8,000+ SHU. The mediums are near equal heat levels of jalapeño peppers, somewhere in the 2,000 – 4,000 SHU range. It is always a good idea to wear gloves, like latex gloves when handling hot chile peppers or you might learn the hard way as it can burn your skin or irritate your eyes!