The ACHA-National College Health Assessment II (ACHA-NCHA II) is a national research survey organized by the American College Health Association (ACHA) to assist college health service providers, health educators, counselors, and administrators
in collecting data about their students' habits, behaviors, and perceptions on the most prevalent health topics.
ACHA initiated the original ACHA-NCHA in 2000 and the instrument was used nation wide through the spring 2008 data collection period. The ACHA-NCHA now provides the largest known comprehensive data set on the health of college students, providing
the college health and higher education fields with a vast spectrum of information on student health. A revised survey, the ACHA-NCHA-II, has been in use since the fall 2008 data collection period.