Blacktown, Sydney, Canterbury-Bankstown, Cumberland and Parramatta councils were home to the greatest number of NSW food safety law breaches in the past six months.

From failing to prevent pests, leaving food open to contamination and neglecting to adequately clean and maintain equipment; a combination of bakeries, seafood stores and restaurants found themselves on the NSW Food Authority "Name and Shame" register, now in its ninth year.

In the 30-day period, 22 businesses were the subject of 35 food safety offences in the three council areas.

A further 54 businesses were the subject of 82 offences in council areas including Mosman, Liverpool, Fairfield, Central Coast and Willoughby.