Google has been involved in pooling data from all its sites to create more targeted advertising which regulators view as a 'high risk' to user privacy.
According to French data protection authority, Commission nationale de l'informatique et des libertés (CNIL), the company not yet implemented modifications in its privacy terms as demanded by the regulators.
"Google did not provide any precise and effective answers," CNIL said.
"In this context, the EU data protection authorities are committed to act and continue their investigations.
"Therefore, they propose to set up a working group, led by the CNIL, in order to coordinate their reaction, which should take place before summer."
The authorities said that the company was given a four month deadline to comply with the European data protection regulation and to implement the G29's recommendations.
The EU has asked Google to to reinforce users consent, provide a centralised opt out tool on data being collected from users' and deploy tools that limit information use for authorised requirements.