Dr. Carl Johnson was Jefferson County's public health director when he began investigating plutonium contamination and cancer around Rocky Flats. His controversial research reported higher cancer incidence in areas with greater measured contamination, and his work became entangled with development, property values and his removal from office. Decades after his death, Johnson is increasingly remembered as an important Rocky Flats whistleblower whose questions about public heal

Rocky Flats Downwinders is seeking independent researchers in epidemiology, biostatistics, environmental health, research methodology, health policy and public-health communication to evaluate both CDPHE's Rocky Flats cancer studies and how their findings have been communicated. The objective is not to predetermine whether Rocky Flats caused disease. It is to determine what the existing evidence can—and cannot—establish and ensure that Colorado communicates those distinctions

Existing cancer-registry studies provide useful information about people diagnosed while living near Rocky Flats—but that is not the same as following the people who lived there during historically relevant periods. RFD is advocating for independent research that considers residential history, migration, latency, exposure-informed geography and long-term health outcomes.

Rocky Flats Downwinders is launching the Truth & Transparency Campaign to ask Colorado for clearer disclosure about what existing Rocky Flats cancer studies can—and cannot—tell us, greater data transparency, independent technical review, and research designed to address the health experiences of people who actually lived near Rocky Flats during historically relevant periods.

CDPHE says decades of cancer monitoring have not found elevated rates among residents living near Rocky Flats. But who was actually studied: people present during potential exposure or people living nearby when diagnosed? Our exchange with Colorado’s cancer registry examines this critical distinction

Randy Stafford spent months reviewing decades of Rocky Flats contamination and health studies for the Jefferson Parkway Advisory Committee. His 26-page analysis identified contradictions in study methods, risk models and conclusions—raising a larger question: what would it take to finally conduct the kind of health research Rocky Flats communities need?

A systematic review of 41 studies found that living with chronic environmental contamination can affect anxiety, stress, depression, and trauma symptoms. The research also shows that institutional dismissal of community concerns may deepen the harm.

The Union of Concerned Scientists explains how ionizing radiation can affect the body immediately or contribute to illnesses that emerge years later. Learn why this research matters to communities connected to the nuclear-weapons life cycle, including Rocky Flats.

One of the most significant contamination events in Rocky Flats history did not begin with a fire or explosion. It began with drums of plutonium-contaminated waste oil stored outdoors. A 1996 study published in Health Physics reconstructed the release of plutonium from an area of the Rocky Flats Plant known as the 903 Pad. The research was conducted as part of a Colorado Department of Public Health and Environment effort to reconstruct historical contaminant releases and esti

The discovery of Rocky Flats-derived plutonium in air-filter samples collected along Indiana Street has renewed concerns about plans to expand the Rocky Mountain Greenway trail system near the former nuclear weapons plant. The Rocky Mountain Greenway Project began in 2016 as an effort to connect three national wildlife refuges—Rocky Mountain Arsenal, Two Ponds and Rocky Flats—through a regional trail network. Plans include an underpass connecting the Rocky Flats National Wild

In 2012, LeRoy Moore and Robert Del Tredici published “Plutonium is forever,” an opinion piece raising concerns about residual plutonium contamination, the Jefferson Parkway and public recreation at Rocky Flats. More than a decade later, the article offers a historical perspective on questions about soil disturbance, public access and long-term stewardship that continue to surround Rocky Flats today.

A 2024 joint submission to the Colorado State Board of Health calls for renewed scrutiny of Rocky Flats, including independent review, air monitoring, additional health research and greater public disclosure.

In a 2018 position paper, Jefferson Parkway Advisory Committee member Randy Stafford examined decades of soil studies, health research and historical records to argue that disturbing soil along Indiana Street could create additional public-health risks. His paper brings together important evidence—and competing interpretations—at the center of the Jefferson Parkway debate.