Facilities with a refrigeration system and/or chillers requiring 50 pounds or more of a high-GWP refrigerant are required to register their facility, keep records of their refrigerant usage, and report that information to the Department. This information is used by the Department to calculate emissions from maintenance of and leaks from these sources. 

A high-GWP refrigerant is any compound or blend of compounds with a 100-year GWP value equal to or greater than 150. The Department maintains a list of high-GWP refrigerants and their 100-year GWP values, for informational purposes.