The Colorado Health Access Survey (CHAS), a program of The Colorado Trust and administered by the Colorado Health Institute, is the only statewide survey that focuses on Coloradans’ health insurance status, access to care, usage of health care services, and affordability. The CHAS data are categorized into 21 Colorado Health Statistics Regions. The 2011 CHAS found that an increasing number of Coloradans (more than 1.5 million) are uninsured or underinsured. Click here to visit the CHAS website and download more information, reports, and briefings.