The contract concerns the monitoring of the water quality of abstractions and different natural environments, especially watersheds Ribou and La Rucette. It aims to monitor and analyze the physical, chemical and biological water quality and sediment of different measurement points. The market is a good market order, passed for a period of notification until 31.12.2016, renewable 3 times by express agreement, by 1 year. It may vary by period, within the following limits: minimum annual amount: 45 000 EUR (including VAT); Annual maximum amount: 180 000 EUR (incl.).