What was found
ENROUTE, JUST PRIOR TO NUCAR INTERSECTION, BAGGAGE DOOR SEAL, CAS MESSAGE ILLUMINATED, FOLLOWED BY CABIN ALTITUDE, CAS MESSAGE SHORTLY THEREAFTER. RAN BOTH ABNORMAL PROCEDURES AND INITIATED AN EMERGENCY DECENT. DECLARED AN EMERGENCY WITH ATC. WE MADE THE DECISION TO DIVERT. LANDED WITHOUT FURTHER INCIDENT. INSPECTED BAGGAGE DOOR SEAL, CHECK GOOD. RAN APU AND PERFORMED BAGGAGE COMPARTMENT ISOLATION SYSTEM FUNCTIONAL CHECK, CHECK GOOD. FOUND NO BAGGAGE DOOR SEAL LEAKS. DISCONNECTED BAGGAGE DOOR SEAL LINE AT DOOR. CONNECTED SERVICE AIR, FOUND EXCESSIVE WATER IN SYSTEM. PURGED AND EVACUATED SYSTEM. OPS CHECK GOOD. COMPLIED WITH BAGGAGE COMPARTMENT ISOLATION SYS FUNCTIONAL CHECK. NO FAULT FOUND.