What's in the last 100 samples sold as cocaine?

How often are drug types found together in confirmed drug checking results?

A given drug sample can have multiple positive results. On way to examine these results is to look at how often things occur together. In the heatmaps below, we present the percentage of samples testing positive for the pair of drugs or drug categories listed, in the most recent 100 samples sold as cocaine (which means the percentage is the number of samples with that pair). The diagonal (where the column name and row name are the same) represents those samples testing positive for only that drug category (these samples may have tested positive for a drug category not listed here). The rows and columns are ordered from largest to smallest share of drug checking samples, alone or in combination. For more details on drug categories named, click here.

For example, if you mouse over the row marked Cocaine and the column marked Methamphetamine, you can see that one sample was positive for meth and for cocaine. The two other samples sold as cocaine but positive for meth are in the Methamphetamine alone cell (Methamphetamine row and Methamphetamine column). The Cocaine alone cell indicates that 90% of recent samples were positive for cocaine and no other category here. If you move along the Cocaine row (or column) you can see the share of all samples that tested positive for cocaine itself and that other drug type. Three samples were positive for no drug category in the matrix.

Data notes

Drug testing sites can do little about potential cross-contamination: The container a client used may or may not have been used before. Therefore, any unusual combination may be due to cross-contamination and not represent drugs actually sold together. Results represent a snapshot of the last 100 samples with confirmatory testing results as of 10:45AM PST 4 February 2025.

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