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Monthey CIMO is a major wastewater treatment plant in Monthey, Valais, Switzerland, serving a population of over 292,000. It operates under Swiss water protection regulations, discharging treated effluent into the Rhône River basin.
Regional ARA Visp is a major wastewater treatment plant serving over 238,000 people in Visp, Valais, Switzerland. It operates under Swiss water protection regulations, ensuring treated effluent meets strict standards before discharge into the local w