In this Friday, Jan. 4, 2018 photo, Green Roads CBD-oil spikes coffee, beer, and other beverages for an extra $2 at Colada in Fort Lauderdale, Fla.

The New York City Department of Health is planning to step up its campaign against restaurants that sell CBD-laced food and drinks by issuing violations "subject to fines" to companies that continue to offer the cannabis compound.

Starting Oct. 1, 2019, the health department will begin doling out infractions to food service establishments for offering food or drink containing cannabidiol, according to an email regulators sent to local business owners this week that was obtained and confirmed by CNBC. The regulators' email to businesses said that in addition to fines the violations could affect a restaurant's letter grade, but the department did not immediately confirm that part of the email to CNBC.

Bars, cafes and restaurants around the city have been adding cannabidiol to cocktails, coffee and food. The compound, which comes from the family of cannabis plants, promises to deliver the calming benefits of marijuana without the psychoactive high that comes from THC.

Despite any supposed health benefits, the health department has started cracking down on eateries in the city, citing safety concerns. In January it banned restaurants, cafes and other establishments from adding CBD to food and drinks. The department inspected some restaurants and asked them not to use the products, though it did not ask them to throw out or destroy the products.