Perrier is facing a new warning. Nestlé has been forced to halt production of its famous sparkling mineral water due to a malfunction in its wastewater treatment facility and abnormal discharges into the Vistre, the river that runs alongside its Vergèze plant in southern France, Le Monde learned, confirming information reported by Radio France. The prefecture of Gard sent a formal notice to the food industry giant on December 10 following an inspection by the Regional…