According to DEA, recent testing has found purity levels ranging between 33 percent and 67 percent at the ounce level, although some ounce exhibits had purities as low as 8 to 9 percent. According to federal, state, and local law enforcement officials, heroin distribution in Los Angeles has changed little over the last 5 years. Mexican trafficking organizations remain fully entrenched in all aspects of the heroin trade including importation and wholesale and retail distribution of Mexican black tar and Mexican brown powdered heroin. Seizures of SA heroin made in the Los Angeles area in 1999 may constitute a trend that bears watching. User patterns in Los Angeles have remained stable over the past 5 years as well.
Most users continue to use Mexican black tar heroin.
Injection remains the primary method of administration, although the use of other methods is gradually increasing. Longtime addicts continue to make up most of the users in Los Angeles. End Notes 10 . Home Page End of page.