Water Supply Sewerage Construction and Investment Joint Stock Company (Waseco) is a Vietnam-based construction company. It constructs water supply and sewerage systems and water plants, as well as non-residential and manufacturing buildings. The Company also provides engineering and surveying services for water supply and sewerage system construction. It is engaged in real estate operations through the development and leasing of office, apartment and commercial buildings. In addition, the Company imports and trades supplies for the water industry, including steel products for water system construction, pumps, water treatment equipment and water quality testing instruments.