Seeing a state-vs-state comparison is interesting, but it really doesn't mean all that much to say that people making under $25,000/year take in 24.7% of the country's income, at least not unless you tell us how many people make up that "under $25k" demographic.
You're reading it backwards. 24.7% of households (not people) take in under $25k each; the infographic doesn't say what this adds up to as a fraction of total national household income.
Unfortunately, your GitHub link is wrong (404). (edit: fixed)