Colorado’s fentanyl death toll climbed 17% over the past year even as the national rate fell 21%, a stark divergence that cost an estimated 1,620 excess lives and $18.3 billion in societal value, according to a new analysis.
The fentanyl epidemic has been the deadliest drug crisis in U.S. history, but recent data suggested a potential turning point. Nationwide, overdose deaths from synthetic opioids finally began to decline, dropping 21% as interventions took hold. In this landscape of slow progress, Colorado stands out for a devastating reason: its death rate surged in the opposite direction.
A Common Sense Institute Colorado report reveals that fentanyl-caused deaths in the state increased by 17% over the last year, making Colorado one of only five states—alongside Arizona (26.3%), New Mexico (21%), Montana (13.7%), and South Dakota (12.5%)—where synthetic opioid overdose deaths rose. The national downward trend continued unabated, highlighting a state-level failure with profound human and economic consequences.
The Anomaly in Data
The Common Sense Institute Colorado report quantifies the divergence with stark precision. Had Colorado simply mirrored the national 21% decline, the state would have avoided approximately 1,620 deaths. This gap represents not just a statistical deviation, but a massive shortfall in public health outcomes.
Tracing the recent trajectory, the state’s synthetic opioid death rate peaked at 1,213 in November 2023. It then fell to 803 one year later—a promising drop. However, after November 2024, the trend reversed, climbing to 957 deaths by August 2025, while most of the country continued its decline. This U-shaped pattern in Colorado suggests a specific, recent erosion of previous gains.
Policy Crossroads: From Misdemeanor to ‘Knowingly Possessing’
The report points directly to legislation as a potential driver. In 2019, Colorado lawmakers downgraded possession of four grams or less of fentanyl and other drugs from a felony to a misdemeanor—a move intended to reduce incarceration and treat addiction as a public health issue. But as the overdose crisis deepened, the state reversed course in 2022, increasing penalties for fentanyl possession.
crucially, the 2022 law included a “knowingly possessing” clause, requiring prosecutors to prove the defendant was aware they had the drug. This created a higher legal barrier that may have reduced successful prosecutions. A 2025 bill sought to strike this clause but failed to advance in the Legislature, leaving the contested standard in place.
The Mounting Toll: Lives and dollars
The impact is measured in both lives and dollars. Using the federal Value of Statistical Life of $13.4 million per person—a metric used to quantify the benefit of reducing mortality risk—the report estimates $18.3 billion in lost value from the excess deaths in Colorado.
“If we just followed the national trend, 1,600 people would still be alive in Colorado, and that is a lot of families that have been devastated by this deadly poison,” said Paul Pazen, a former Denver Police chief and a Common Sense Institute Public Safety Fellow who authored the report. His statement underscores how the anomaly translates into tangible, widespread grief.
Why the Divergence?
The report establishes the “what” and “how many” with clarity, but the “why” remains a critical question. Colorado’s geographic position as a crossroads for interstate drug trafficking may play a role, as could lingering effects of the 2019 policy shift that was only partially reversed in 2022. The persistence of the “knowingly possessing” requirement may create enforcement gaps that other states without such a clause do not face.
Whatever the combination of factors, the data is unequivocal: Colorado’s approach to fentanyl is failing to protect its residents at a time when the nation is finally seeing progress. The state now bears the grim distinction of being a national outlier in rising synthetic opioid mortality.
The Common Sense Institute Colorado report serves as both a diagnostic and a warning. It documents a massive loss of life that appears preventable based on national trends, and it ties that loss directly to policy choices. With over 1,600 excess deaths in just one year, the urgency for legislative and enforcement recalibration in Colorado cannot be overstated.
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