IMPACT100 Macomb is an organization of women in philanthropy and collectively funds high-impact grant Impact100 Macomb County is a nonprofit organization comprised of 100+ women, each donating $1,000 annually for a shared purpose: to make a difference in our community. Money is used to fund high-impact grants and creates a rare opportunity for nonprofit organizations and allows members to have a significant, positive impact in the county. The number and amount of grants are determined each year by the number of women who join Impact100 as members.