Most arrests were for cocaine sale or possession (51,462 arrests); marijuana was second (34,191); and heroin was third (16,543). There were 12,158 arrests for all other illegal or illegally obtained drugs. Reported drug quantities seized include 59 tons of marijuana, 16,769 pounds of cocaine/crack, and 482 pounds of heroin. Some of the cities reported only the arrests and seizures made by narcotics branches rather than the police department as a whole. In some cities, 90 percent of arrests were drug related. This report presents a statistical breakdown of drug arrests and seizures for each of the cities and narrative descriptions of drug enforcement efforts and patterns of drug use. In some cases, statistics indicate the value as well as the amount of drugs seized for a city.