"In the report, Ren and his colleagues first set out to estimate how much power California data centers had consumed in recent years, then to forecast how much they would use in the coming ones. To determine that, they looked at figures and forecasts from reports issued last year by Lawrence Berkeley National Laboratory and the Electric Power Research Institute.
Using Berkeley Labs’ national numbers and calculating California’s from them by tapping the ratio of the state’s usage to the national number in the EPRI report, the researchers determined that California data centers consumed 5.5 terawatt hours of electricity in 2019. They estimated that amount rose steadily in ensuing years, hitting 10.82 terawatt hours in 2023.
Ren and his team split the difference between Berkeley Lab and ERPI’s wildly different forecasts, estimating that data center energy usage in California would rise between 8.4% and 18.5% a year from 2023 to 2028. Based on that, they calculated that such power consumption by 2028 would grow to between 16.2 and 25.3 terawatt hours.
Those projections represent as much as one-fourth of all commercial power consumption in the state last year, according to the California Energy Commission, and up to 8.9% of electricity usage across California as a whole.
(...)
All told, the on- and off-site pollutants emitted in California as a result of data centers resulted in $44.7 million in health-related costs in 2019, according to the Next10 study. That amount rose to $155.4 million in 2023. That jump was largely due to the large growth in the number of data centers over that period, according to the report. In all, health-care expenditures cost Californians $409 billion in 2023, according to the state Office of Health Care Affordability.
The study forecast that the growth in costs would slow in coming years, increasing to between $167.1 million and $266.6 million in 2028."
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San Francisco Examiner
Study: Data centers’ environmental impacts rising
Related emissions, water use, health costs all increasing







