Present in the region since 2019, Stereau Suisse supports municipalities and industrial companies in the design, construction, and modernization of water treatment facilities. As a subsidiary of Stereau, a recognized specialist for over 60 years, we put our expertise and capacity for innovation at the service of your facilities: drinking water production plants and wastewater treatment plants. Stereau Suisse is developing adapted solutions: Drinking water • Increasingly complex treatments, compliant with strict standards in force. • Solutions designed to ensure health safety and operational reliability. Wastewater • Elimination of emerging micropollutants (pesticides, drug residues, plastics, PFAS, etc.). • Energy optimization and reduction of operating costs. • Transformation of effluents into recoverable resources. Our local presence allows us to develop relationships of trust and responsiveness, while benefiting from the international support and expertise of Stereau and the Saur group. 📍 Stereau Suisse SA Rue Galilée 6 – CEI3, 1400 Yverdon-les-Bains 📞 024 564 01 30 | ✉️ info.ch@stereau.com 🌐 www.stereau.com

Sanitary engineering Reservoirs are important infrastructural facilities that supply drinking water to the population. The majority are made of concrete, as the material is exceptionally well suited to receiving and storing drinking water without having a negative effect on its taste or composition. However, experience shows that brown patches can occur on clean mortar surfaces in tanks after only a few years of use. This can be the result of ionic currents. Corrosion protection is also a very important consideration in pumping stations or waste water treatment plants. Combining a tailormade corrosion protection concept with an active corrosion protection system extends the operating life of all structures and optimises the associated maintenance costs. Sanitary engineering – our services include: - Corrosion protection consultancy - Protection against brown patches - Earthing concepts - Concepts for personal protection - Cathodic protection systems

About Techfina We have been around for 60 years - long enough to make this brief. We are contractors in the environmental sector, specialising in municipal and industrial waste water and sludge treatment. Our broad experience ranges planning and delivering of special subsystems to the comprehensive project planning and realisation of turnkey sewage treatment plants. We are always customer-oriented and provide extensive consultation so that optimum solutions can be found in collaboration with all our partners. We only use high-quality key components. Combined with our in-depth knowledge of the wastewater treatment processes, this guarantees our customers highly reliable systems and plants. Our detailed planning and our experience in building waste water treatment plants allow us to execute our projects flawlessly within shortest construction time. Our project managers take over responsibility from the planning stage until handover to the operator, and continue to serve our customers throughout the warranty period and far beyond. Our company has three locations: Winterthur Switzerland Active in German-speaking Switzerland, Germany and Eastern Europe Geneva Switzerland Active in French-speaking Switzerland Metz France Active in France and throughout the French-speaking region

Upwater, a spin-off of the ETH Water Research Institute (Eawag), offers two innovative measurement methods for wastewater treatment plants. The "Notos" measurement system enables high-resolution determination of greenhouse gases in the exhaust air from wastewater treatment tanks. The data can be used to optimize processes or create a carbon footprint. This system is currently in use at eight wastewater treatment plants in Switzerland and three in Europe, with additional plants under construction. In addition to greenhouse gas measurement, upwater also offers monitoring of the wastewater treatment tank microbiome. The composition of microorganisms in the sewage sludge is regularly determined in the laboratory using DNA sequencing. This approach enables a better understanding of biological processes and helps identify and resolve problems at an early stage. The application of these two technologies not only contributes to reducing greenhouse gas emissions produced in the form of nitrous oxide during biological processes, but also enables a better understanding of the treatment processes. This helps meet increasing demands for water quality.

Vogt Technik GmbH was founded in 2019 with its headquarters in Siebnen SZ. Our many years of experience in the construction industry, as well as supply and disposal, generally in the water and gas sector, make us a previous partner. Today we operate in our four core competencies welding technology, plastic shaft construction, press rings and construction pumps and believe in our customer relationships and flexible. Through our partner we can sell you products products that have been on the market since their first success. We are proud that we have permanent national representation of various interest groups. We are happy to be available to our customers and enjoy each and every "unsolvable task".

We are Watertec PRO, your partner for professional water treatment and innovative technologies. As specialists, we develop tailor-made solutions in a wide range of areas (Industry, commerce, household) that are tailored to the individual needs of our B2B customers. Whether you need process optimisation, problem solving, retrofitting or new construction for your plant, we are happy to provide you with professional advice based on our experience so that you can implement optimal solutions for your water treatment projects. Watertec is part of the internationally active Pollet Water Group. We have set ourselves the goal of improving the quality of life through a network of specialised water treatment companies. #Water treatment #Drinking water #Process water #Filtration #Softening #Reverse osmosis #Valves #Filtermedia #UV