The 2020 census data dropped this week and with it we get a view of how our County has been growing and changing. The Comicle lists the numbers for San Mateo County as shown below; with the Change column added by me because that is what any numerate person would be interested in seeing without having to calculate it themselves.
2010 2020 Change
Population 718,451 764,442 +45,991
% Age 16+ 77.8% 79.8% +2.0%
Then there is the constant need to highlight Ethnicity
White 42.3% 36.1% -6.2%
Hispanic 25.4% 25% -0.4%
Black 2.6% 1.9% -0.7%
Asian 24.5% 29.8% +5.3%
Other 5.2% 7.2% +2.0%
Now a bit of analysis. The ten-year growth in population is 6.4% which equates to a Compound Annual Growth Rate (CAGR) of 0.622%. That is a little more than half the growth rate of Alameda County (11.4%) and a shade below our southern neighbor Santa Clara County at 8.7%. I'm not sure I trust the SF County number of 8.5% given the exodus accelerated after the start of the census.
Given that we have the exact same water storage capacity as we had ten years ago, I would have to conclude that any "crisis"-driven move to add lots more high-density housing on top of the massive amount that is already approved and/or being built is misguided. There is more data to come soon on how much more efficient we are getting in our water usage, but taking 6.4% up to 8.7% or 11.4% without a comprehensive plan is crazy.


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