The Drowning Prevention Coalition of Arizona appreciates the continued support of Timothy J. Flood, M.D. and the Arizona Department of Health Service in the creation of this annual report. For an electronic version of this report go to: https://www.azdhs.gov/preparedness/public-health-statistics/index.php#publications This annual report provides statistical information about drownings and nonfatal drownings occurring in Arizona, with a focus on incidents occurring in Maricopa county. Starting with data for 2016 we analyze Arizona hospitalization data, called the Hospital Discharge Database (HDD). The national switch in late 2015 to ICD-10-CM diagnostic coding allows a robust analyses of admissions to emergency departments and to the inpatient setting. In 2016, 2017, 2018, and 2019 the HDD recorded 419, 454, 431, and 410 statewide admissions (incidents) among persons of all ages. Young children (0-4 years of age) comprised 952 of these admissions statewide. For the 4-year period, a...