The main subject of activity of TopolWater, ltd. at present is the production and sale of facilities for the treatment of domestic, municipal and industrial wastewater. The production and sale of domestic wastewater treatment plants called TOPAS has the principal ratio within this activity. The technology for the domestic TOPAS wastewater treatment plants was developed by TopolWater, ltd. and is protected by international patent No. 282 411. It is delivered for capacities 5 to 150 EO in the form of compact plastic containers. These are characterized by their high efficiency, low price and reliable operation without any requirements for servicing. The main objective of TopolWater, ltd. is the provision of comprehensive services from the creation of the project up to the implementation of the work and ensuring trial operation up to the conclusion of the resulting contract for the operation of the wastewater treatment plant.