Since I have already answered a similar question on Data Science StackExchange site, plus some related ones, I will mention all of them here and let you decide, if you find them helpful:
on data science project ideas, including those with social impacton data science project ideas, including those with social impact;
on working as a data scientist for a non-profit companyon working as a data scientist for a non-profit company;
on using data science in political campaignson using data science in political campaigns.
