Ofsted, which inspects children's social care including child protective services, said more needs to be done to address "incompetent and ineffective" leadership in children's services.
Some managers do not have a "firm understanding" of what constitutes good practice, the watchdog said.
In its first stand-alone social care annual report, Ofsted said that children's services need "strong and stable leadership" to improve the services that provide help, care and protection to children at risk of abuse or neglect.
Inspectors found that in the weakest places many "basic acceptable practices" were not in place and some authorities were criticised for poor coordination with health workers, police and schools.
More top news
The decision represents something of a victory for the president who will now be able to enforce most of his controversial 90-day ban.
Cool in the north, warmer air to the south
Police have warned the drug, known locally as "pink champagne", could be deadly.