All areas within the State of South Carolina are eligible for assistance under the Hazard Mitigation Grant Program.
Your best resource is actually FEMA directly.
We do have many homeowners using HMGP Elevation for the declared 2016 and 2017 disasters the state of Louisiana suffered. I want to be sure everyone in North Carolina as well as all those in the 117 disasters after DR-4277 understand that you can and should mitigate after each disaster even if your area was not impacted.
You should have a state flood plan manager or even a city, county or parish planner that can advise you.
Call your state representatives if you seem to run into a brick wall.
If you are using the HMGP and would like to share your story please use the contact page to send a brief summary with your location. We will follow up with our Recovery email address so you can submit pictures and your story as you are mitigating or after you have completed your hazard mitigation.