According to Lydec, surveys show that more than 90% of its customers have noticed improvements: shorter waiting time at customer centers, simplified procedures, quicker repairs, more reliable billing and less inundations. In particular, Lydec built the Western collector, a 4.7 km underground stormwater drain with a capacity of 40 m3/s. Also, the company says that it saved 25 million cubic meters of drinking water in 2002 compared to the situation before the concession.[7]