Your source doesn't support that (no comparison with other places), and other sources don't seem to back it up. See the "Local Life Expectancies by Income" char

Your source doesn't support that (no comparison with other places), and other sources don't seem to back it up. See the "Local Life Expectancies by Income" chart here: https://www.healthinequality.org/ https://www.healthinequality.org/. It seems generally that high income people have comparable life expectancies across the country, whereas there is much higher variability among lower incomes.