Weld County has begun a “Marijuana Is Not Harmless” campaign, but it appears to rely on federal data that differ from the state’s findings on marijuana use.

The Denver Post reports that this summer, the county saw data suggesting that youth use of marijuana and vaping devices was increasing, along with car crashes.

“We wanted to get out there that there are consequences to heavy marijuana use and certainly when you get behind the wheel and drive,” said Eric Aakko of the Weld County Department of Public Health and Environment, according to The Post.

The county pointed to the findings of the 2019 report from the federally-funded Rocky Mountain High Intensity Drug Trafficking Area, which has published Colorado-focused reports every year since marijuana became legal in 2013.

This year’s report used the results of the National Survey on Drug Use and Health from 2016 and 2017 to disclose that marijuana use in the past month increased 58% for those age 12 and older since 2013. However, a 2019 Colorado Department of Public Safety report found “no significant change in past 30‐day use of marijuana between 2013 (19.7%) and 2017 (19.4%).”

The state relies on the NSDUH survey — which has “many fewer respondents” — as well as the Healthy Kids Colorado Survey. The former survey had 512 respondents, and the latter had nearly 54,000.