Purity

On the street, heroin purity and price often reflect the drug's availability. High purities and low prices, for example, indicate that heroin supplies are readily available. DEA's Domestic Monitor Program (DMP), a retail heroin purchase program, tracks urban street-level heroin purity and price. The most recent data available show that, in 2000, the nationwide average purity for retail heroin from all sources was 36.8 percent. This number is significantly higher than the average of 7 percent reported two decades ago and higher than the 26 percent recorded in 1991. The significant rise in average purity corresponds to the increased availability of high-purity SA heroin, particularly in the northeastern United States.
Moreover, the DMP indicated that the retail purity of SA heroin was the highest for any source, averaging 48.1 percent in 2000. SWA heroin followed with a 34.6 percent average and Mexican heroin averaged 20.8 percent. Heroin purity at the street level generally remained highest in the northeastern United States, where most of the nation's user population lives. In 2000, Philadelphia recorded the DMP's highest heroin purity average of 74.0 percent. Over the last several years, Philadelphia has ranked consistently at or near the top in DMP retail heroin purity levels. In addition, New York City continues to be one of the major importation and distribution centers for SA and SEA heroin.