Marijuana Use in Past Month, by Grade Level

Year(s): 2017-2019

Contra Costa CountyPercent
Grade Level0 Days1 Day2 Days3-9 Days10-19 Days20-30 Days
Grade 798.1%0.7%0.4%0.3%0.2%0.2%
Grade 992.1%2.8%1.2%1.8%0.9%1.3%
Grade 1182.3%4.5%3.2%4.3%2.1%3.5%
Non-Traditional58.6%5.6%3.4%7.5%4.3%20.6%