## A Step Forward for **Water Quality** In response to the requirements of the Swiss Water Protection Ordinance, ARA Altenrhein has adopted a cutting-edge system combining ozonation and granular activated carbon, ensuring the removal of over 80% of targeted micropollutants. ## Benefits for **Health** and the **Environment** - Amélioration de la qualité de l’eau pour les habitants - Contribution à la santé publique et à la qualité de vie - Solution économique et durable pour répondre aux réglementations strictes ![Visual showing the city of Altenrhein on the map of Switzerland](/sites/g/files/dvc4206/files/image/2025/07/map-altenrhein-suisse-604x302.png) Over **80%** of 12 targeted micropollutants removed, including pesticides Treatment capacity: **120,000** population equivalent **First wastewater treatment plant in the world to use this technological combination** ![pharmaceuticals cosmetics pictogram](/sites/g/files/dvc4206/files/styles/default/public/image/2025/08/picto-produits-pharmaceutiques-cosmetiques-604_0.png.webp?itok=bOj5q_-B) ## Key figures ![Background (Codant Veolia)](/sites/g/files/dvc4206/files/styles/crop_freeform/public/image/2025/03/background.png.webp?itok=uD4W93Mt) - Discover how Veolia innovates to **protect water resources** [Download the full case study](/en/ecological-transformation-case-studies-full-brochure) ![Pictogramme icon étude de cas case studies](/sites/g/files/dvc4206/files/styles/default/public/image/2025/03/Case%20study%20-%20icon.png.webp?itok=sWYmTNRI) #### Download the full brochure ![Icon pictogramme téléchargement download](/sites/g/files/dvc4206/files/styles/default/public/image/2025/03/Te%CC%81le%CC%81chargement%20libre_0.png.webp?itok=RAVn1d7f) **By downloading the brochure, you will have access to the full case studies, including:** • **Specific technologies** implemented • Exclusive **key figures**... Don't miss this opportunity to learn more about the concrete solutions offered by Veolia to support the ecological transformation of your city! [Download the full brochure](/en/ecological-transformation-case-studies-full-brochure) ![Cover brochure - Achieving the successful ecological transformation of your city together](/sites/g/files/dvc4206/files/styles/default/public/image/2025/07/Cover%20brochure%20-%20Achieving%20the%20successful%20ecological%20transformation%20of%20your%20city%20together.png.webp?itok=jRFypRuj) ![Paysage urbain](/sites/g/files/dvc4206/files/styles/crop_freeform/public/image/2025/03/couverture%20illustration.png.webp?itok=qsGMMYbU) You may also be interested in these case studies [ ![Refinery in Kaohsiung, Taiwan](/sites/g/files/dvc4206/files/styles/content_push_teaser/public/image/2025/07/taiwan-depolluer-raffinerie-320x245.jpg.webp?itok=D0AjmWWt) ](/en/cities/kaohsiung-taiwan-cleaning-old-refinery-sustainable-industrial-conversion "In Kaohsiung") Taiwan [In Kaohsiung](/en/cities/kaohsiung-taiwan-cleaning-old-refinery-sustainable-industrial-conversion "In Kaohsiung") Cleaning Up an Old Refinery for 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