MWSS and its partners held a joint commemoration of 113th Philippine Independence day on 12 June 2011 in a historic first since the partnership between MWSS and the two concessionaires started in 1997. The brief ceremony started with an invocation followed by a flag ceremony (singing of National Anthem and reciting of Panatang Makabayan), a brief backgrounder on the history of Philippine Independence and finally, messages from the heads of MWSS, MWCI and MWSI.