New standards would allow more contaminants in marijuana

The state proposed new standards Friday for measuring contaminants in medical marijuana, paving the way for widening access to the drug.

The new protocols, to take effect next spring, would revise existing limits on the amount of heavy metals, solvents, and hydrocarbons allowed in medical marijuana sold in licensed dispensaries.

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The proposal would allow higher levels of most contaminants, but also require labels making it clear the product is safe only up to a certain amount.

Existing…