It’s been nearly two months since the industry’s largest-ever product recall, and enforcement remains uncertain.

Pool and spa service contractors, in many cases, are being asked to identify and replace hundreds of thousands of drain covers that were deemed potentially hazardous by the U.S. Consumer Product Safety Commission in late May.

But local and state health departments, which typically ensure compliance for the nation’s public pools and spas, are finding they have little authority to carry out the CPSC’s recommendation that facilities be closed until recalled covers are replaced.