As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO PHX DUE TO ALL TOILETS WERE INOPERATIVE. THE AIRCRAFT LANDED SAFELY AT PHX WITHOUT FURTHER INCIDENT. AFTER SERVICING OF THE LAVATORY SYSTEM MAINTENANCE ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK WITH NO ISSUES NOTED.