H-E-B and Carter BloodCare celebrate 15th annual ‘H-E-B Challenge’; Mexia event July 7 Sat, 06/30/2018 - 12:00am This summer marks the 15th annual “H-E-B Challenge” blood drive in Central Texas. The grocery chain prioritizes blood donation in ...PLEASE LOG IN FOR PREMIUM CONTENT. Our website requires visitors to log in to view the best local news. Not yet a subscriber? Subscribe today! Read more about H-E-B and Carter BloodCare celebrate 15th annual ‘H-E-B Challenge’; Mexia event July 7