Gristedes is one of the most common and well-known supermarket chains across New York City, with 19 store locations primarily in Manhattan. Gristedes, together with D’Agostino’s, another common NYC grocer, are privately owned by Red Apple Group, a conglomerate with subsidiaries in real estate, media, and the petroleum industry.3 Gristedes has a history of ridiculing4 and violating New York City’s plastic bag ban.5 To our knowledge, neither Red Apple Group nor Gristedes have made public commitments or goals to reduce HFCs or other greenhouse gases. Gristedes does not make public any information about its refrigerant management practices or leak rates, nor is there any information regarding the company taking steps to adopt more climate-friendly technologies6 to replace HFCs.Our team detected refrigerant concentrations ranging from 2 to 13 parts per million (ppm) in and around refrigeration equipment in the stores. Detection of any concentration 2 ppm or greater is considered a potentially major refrigerant leak. The concentration of gas detected is not necessarily indicative of the size of a leak. Even detection of low concentrations can be indicative of very large leaks, since the gas can be dispersed throughout a large volume of air in the supermarket, and leaks can continue over a long period of time.