USDA THC Testing Guidelines
For states that grew hemp in 2018, identify their rate of failure for hemp samples testing above the 0.3% THC concentrate limit.
- In 2017, 135 hemp samples were tested within the state and 14 tested above 0.3% THC
- In 2018, about 400 samples were tested and 38 came back positive.
- Thus, around 10% of samples are testing as "hot hemp," the term used to describe hemp over the 0.3% limit.
- The average rate of failure by testing over 0.3% THC for hemp samples in Colorado is 30%.
- Washington State was using a different process to test hemp up until October 31, 2019. The state tested the entire plant, instead of just a top clipping like other states do. With testing the entire plant, state officials said virtually everyone passed. One sample did fail, but was retested at a different lab and passed.
- Farmers in Washington are concerned that more people will fail with the new rules, which also decrease the testing time frame from 30 days prior to harvest to 15 days.
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