Overview
PRE EN PAIL 2 is an advanced wastewater treatment plant in Pré-en-Pail-Saint-Samson, Pays de la Loire, France, serving 1,827 people with a designed capacity of 2,700 m³/day.
PRE EN PAIL 2 is a municipal wastewater treatment facility located in Pré-en-Pail-Saint-Samson, within the Mayenne department of Pays de la Loire, France. The plant serves a population of approximately 1,827 residents, classifying it as a small agglomeration under French and EU regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 2,700 m³/day and a current discharge volume of 325.93 m³/day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Loire River basin and then into the Atlantic Ocean. The plant's advanced treatment helps protect downstream water quality and supports the ecological health of the region's rivers and estuaries.
Environmental context
The plant discharges into the Mayenne River system, a tributary of the Maine River, which flows into the Loire River and eventually reaches the Bay of Biscay in the Atlantic Ocean. The Loire basin is ecologically significant, supporting diverse aquatic life including migratory fish species. Advanced treatment at this plant helps reduce nutrient loading and protects downstream habitats.
Frequently asked questions
PRE EN PAIL 2 is located at Rue des Tesnières, Le Bois Yottin, Pré-en-Pail, in the commune of Pré-en-Pail-Saint-Samson, Mayenne, Pays de la Loire, France.
The plant serves a population of 1,827 people, classifying it as a small agglomeration under French wastewater regulations.
The treated wastewater is discharged into the local watershed, which flows into the Mayenne River system, part of the Loire River basin that drains into the Atlantic Ocean.
PRE EN PAIL 2 provides advanced treatment, which exceeds the secondary treatment standard required by the EU Urban Waste Water Treatment Directive for agglomerations of this size.
The plant has a designed capacity of 2,700 m³ per day, with a current average discharge volume of 325.93 m³ per day, indicating significant spare capacity.
Nearby plants