On the Polish - Ukrainian border there are transboundary groundwater reservoirs, which are of key 
importance in shaping the strategic groundwater resources. Both neighboring countries are obliged to 
undertake joint actions for the sustainable use of their resources. Transboundary groundwater resources 
between Poland and Ukraine are largely uncharacterized due to the lack of data to date and limited 
institutional cooperation. The key challenge is the internationally balanced abstraction of groundwater that 
does not disturb the environmental balance and secures sufficient transboundary flows. Achieving this effect 
is possible by optimizing consumption and eliminating distribution losses, unregistered consumption or 
consumption without permission. On both sides of the border, groundwater is mainly used to supply the 
population with drinking water. The results of the EU-Waterres project show that the problem of unregistered 
abstraction occurs on both sides of the border and can be an important factor in the emergence of cross￾border drawdown cones and mutual capture of resources. In Ukraine in the border areas, the percentage of 
the population connected to the public water supply network does not exceed 10%. Without the expansion 
and modernization of the public water supply system, it will not be possible to conduct controlled use of 
groundwater, taking into account environmental limits. This project is dedicated to this challenge.
The overriding goal of the project is to establish a sustainable interstate exploitation of transboundary 
groundwater resources by optimizing the water supply system. In particular, the objective is to expand the 
public water supply system in the town of Lubaczów and the commune of Horyniec-Zdrój and 18 towns in the 
Lviv region. The expected changes that the project will provide are related to increasing the access of the 
population of border areas to public water supply and optimizing cross-border impacts due to groundwater 
abstraction.
The project will create 4 main product groups: 
1. modernized technological installation of the hydrophore plant and water intake of the public 
water supply system in Horyniec-Zdrój; 
2. modernized hydrophore installation, one new and 2 modernized treated water tanks along with 
the extension of 2 water supply networks for the city of Lubaczów; 
3. new public water supply systems in 18 schools in the Lviv region; 
4. solutions for sustainable groundwater abstraction and development of new intakes in selected 
areas.