Original sentence: In the Middle Ages, the Roman aqueduct had fallen into ruins and residents once again took their water from the Seine or from wells
Edited sentence: All of the fountains were on the Right Bank;  the water table was close to the surface there, and it was easy to dig wells, while on the Left bank the water table was deep underground,  and there were no working aqueducts;  almost all water had to be carried from the Seine.As a result, the Left Bank had hardly grown since the time of Philip II.By 1498, when Louis XII of France became King, the water supply of Paris was controlled jointly by  the merchants of the city, led by the Prévot des Marchands, and the King.In the Middle Ages, the Roman aqueduct of Arcueil had fallen into ruins and residents once again took their water from the Seine or from wells.The water supply of Paris was still very limited;  by the end of the 15th century, there were only seventeen fountains providing water in Paris, including five outside the walls.They decided how water would be distributed, and were responsible for building public fountains