From the USCG Website:

To find out if your school qualifies for BLUE 21, call your local recruiter or click here Search For Schools, Colleges and Libraries. Follow the link to your school and click on "college overview." Read through the stats on college enrollment to see if your school has at least a 25 percent minority enrollment (not including international students).

Blue-21's goal is to attract underrepresented minorities into CG aviation, that's why this is an unwaiverable requirement. You can check to see if ERAU qualifies.

UNITED STATES COAST GUARD: has a lot of information as well as the necessary forms you need to fill out.

This forum: Coast Guard OCS :: OCS Foundation Portal has a TON of info also.

Good luck.