There are currently 4 food businesses with hygiene ratings in Gwernymynydd. These ratings are given by local authority inspectors following visits to restaurants, takeaways, pubs, cafes, and other food premises.

The Food Hygiene Rating Scheme (FHRS) rates businesses from 0 (urgent improvement necessary) to 5 (very good) based on three criteria: how hygienically food is handled, the condition of the building, and how well the business manages food safety.

In Gwernymynydd, the average hygiene rating is 4.8/5. Ratings are updated following inspections by the local council and may change over time.