The article discusses how reducing water usage in households in Central and Eastern European countries since the 1990s has affected the quality of domestic sewage. By analyzing water consumption trends from 1950 to 2019 and the content of total suspended solids in sewage, researchers found that as water usage decreases, the concentration of solids in sewage increases. This suggests that lower water consumption in homes may be influencing the quality of wastewater discharged to treatment plants.