A urine test can detect THC for up to 30 days after use. THC is detectable in blood for the shortest time, up to 12 hours, but can stay longer in heavy users. Hair tests show THC use for the longest ...

DENVER (KDVR) — Two batches of marijuana sold at six dispensaries across Colorado were recalled after they were found to be “contaminated.” On Tuesday, the Colorado Department of Revenue and the ...

Arizona dispensaries are required to test cannabis products for potency and contaminants. Testing regulations, implemented in 2020, cover potency and contamination from microbials, heavy metals and ...

Getting your Trinity Audio player ready... Colorado’s health department and the Marijuana Enforcement Division will collect samples from dispensaries around the state in a one-time spot-check for ...

This article was produced for ProPublica’s Local Reporting Network in partnership with The Denver Gazette. Sign up for Dispatches to get our stories in your inbox every week. Colorado marijuana ...