An arrow chart compares heroin detection rates among fentanyl users in western U.S. states for 2024. The data compares 2024 rates for January to June and July to November across states like Alaska (17.2% to 34.7%) and Arizona (6.1% to 30%). Notable increases are seen in Alaska and Utah. Montana is the only state that saw a decrease from 6.9% to 6.3%