CDPHE’s cancer studies provide limited geographic comparisons, but they did not identify exposed residents, reconstruct residential histories, measure individual exposure, or follow people over time. Without that information—and with questions about the study boundaries and Denver metro comparison population—the health effects of Rocky Flats remain unresolved.

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