A premature death is defined as one occurring before the age of 75, and researchers measure longevity by figuring the number of years that are lost when death occurs before that age, according to the University of Wisconsin Population Health Institute, which estimates the rates in collaboration with the Robert Wood Johnson Foundation.
According to the estimates, Marin County had the fewest years lost with 3,100 per 100,000 people. That was followed by San Mateo County at 3,500 and Santa Clara County at 3,600.
Here’s how the counties rank by the Years of Potential Life Lost measure.
1. Marin County — 3,1002. San Mateo County — 3,5003. Santa Clara County — 3,6004. San Francisco — 4,4005. Alameda County — 4,5006. Napa County — 4,5007. Contra Costa County — 4,6008. Contra Costa County — 4,6009. Solano County — 6,100 Statewide, the average number of years lost is 5,300 per 100,000 residents. The region with the highest number of years lost is Lake County, with 11,600 per 100,000 residents.
In a statement, Marin County’s public health officer, Dr. Matt Willis, said, “We have great access to green space and opportunities for physical activity, nutritious local foods, and high-quality health care. All of these things contribute to health and longevity.”