From the perspective of construction technology, this project was extremely complicated. Raw water will be pumped to the water treatment plant from Mustajõe, which is about 26 kilometres away, and the water will flow downstream through the entire treatment process until it reaches clean water reservoirs. Due to this downstream flow, was it necessary to set up many systems of filters and channels at different levels in the building, and on the other hand, having the water running downstream set up additional requirements with regard to the precision of work. The maximum capacity of the plant is 20,500 m³/d and is implemented a technology that enables local residents to be supplied with potable water which meets Estonian and European standards. The technology was selected based on pre-conducted pilot tests so to find a technology that would be most suitable for treating the raw water taken from the Narva River.