PLACERVILLE, Calif. (CBS13) — Parents of Placer County students can now buy discounted drug tests from high schools, a tactic that county officials hope will help cut down on what appears to be a rising drug use rate.

The inventive anti-drug campaign comes on the heels of a recent survey from a Placer County high school that found “half of the students” use marijuana.

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The Placer County Sheriff’s Department is making the $40 drug tests available for just $10 for parents in response to concerns over drugs in schools. The 10-panel urine test checks for methamphetamines, cocaine, marijuana, ecstasy and other drugs, officials said.

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A simple $2 test to check for alcohol is also available, said Deputy Laurie Bettencourt.

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Parents can buy the tests on campus from the school’s resource officers or at the sheriff’s offices.