The construction of the Reno-Setta feeder channel, in 2010, was a fundamental measure for the Bologna area, the substantial results of which can now be quantified. As requested by the Regional Government of Emilia-Romagna among the offsetting measures for the construction of the Variante di Valico, the feeder channel conveys part of the water from the Reno river to the Sasso Marconi drinking water plant, in order to supplement the abduction from the Setta torrent, increasing the volumes of drinking water purified from surface sources and thus reducing groundwater withdrawals from well fields in the plains. The analysis of past data on the water table levels in the Bolognese plain (average static levels of the 5 stations of Borgo, Tiro, S. Vitale, Mirandola, and Fossolo) and the monthly volumes taken from the water table, from 2002 to 2018, shows an increase in the water table level after 2010 and a substantial decrease in volumes withdrawn. In particular, the analysis shows that before 2010 the average static level was about -50 m below ground level, while from 2010 to 2018 the average is around -42/-43 m, with an average increase of 7-8 m. As regards the volumes before and after 2010, the difference is on average 531,000 m3 /month less water drawn from groundwater (6,370,000 m3 /year). It is therefore possible to estimate that about 50 million m3 less groundwater has been withdrawn in well over 8 years. This volume is equivalent to about 7 months of total production of the primary system. This is a decisive contribution from an environmental point of view of the circular economy of the water resource that benefits both the environment (reduction of subsidence) and the service (increase in groundwater storage).