The newly-constructed Maha Oya Water Treatment Plant funded by the Government of Japan was ceremonially handed over to the National Water Supply and Drainage Board under the patronage of President  Maithripala Sirisena and Japanese Ambassador Kenichi Suganuma, at Maha Oya on October 19, 2016. The Government of Japan provided Rs. 6,300 million towards the construction of Maha Oya Water Treatment Plant in Ampara District under the Eastern Province Water Supply Development Project. The project aims to benefit around 210,000 people in the Ampara District