On May 15th, 2014 the Ministry of Health, Republic of South Sudan formally declared cholera outbreak based on laboratory confirmation of stools samples done on the 6th of May. As of August 2nd, 5,536 cholera cases including 121 deaths (CFR 2.2%) had been reported throughout South Sudan, especially Central Equatoria, Eastern Equatoria and Upper Nile States. ACF played a key role as an emergency partner and has significantly strengthened the overall response amongst WASH partners. The purpose of this real-time evaluation was to capture learning from the response to the cholera epidemic and to strengthen it. Although not a primary focus, ultimately this evaluation also informs future rapid-onset emergency responses.