Interiors of 1,022 low-income apartments in north-central Florida were sampled with sticky traps to determine severity of infestations of German cockroach, Blattella germanica (L.). Median catches were 28.3 cockroaches per trap per night ( x _bar, 42.3); 9.4% of apartments had catches of > 100 cockroaches per trap per night. Heaviest infestations were found next to the garbage container (median nightly trap catches = 36.0). Half of all apartments contained >13,000 cockroaches. Although apartment complexes under monthly pest control service (PCS) agreements exhibited median trap catches below the overall median of all complexes, levels were not below those of all complexes without monthly service, and populations were still above levels commonly considered tolerable. Examination of population levels over time suggested that seasonal increases in numbers of German cockroaches can be prevented by monthly PCS. Current control technologies commonly used in apartment complexes are not sufficient to maintain populations at acceptable levels.