Wastewater Treatment Plants

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Wastewater treatment plant suppliers design, manufacture, and install systems that remove contaminants from municipal and industrial wastewater through mechanical, biological, and chemical treatment stages. The suppliers below range from plant manufacturers to engineering firms that plan and commission treatment facilities across Europe.

  • Western & Central Europe
  • Northern Europe & Baltics
  • Southern Europe
  • Eastern Europe
  • Ireland & Northern Ireland
  • EEA (Non-EU)
  • DACH Region
  • Western Europe
  • Northern Europe & Baltics
  • Central & Eastern Europe
  • Southern Europe
  • Nearshore Markets (Non-EEA)
  • Global Sourcing
  • Other
  • Core Certifications & Sustainability Proofs
  • Supplier Conduct & Compliance Documents
  • Industry-Specific Quality & Compliance Standards
  • Health, Safety & Social Compliance Standards
  • Cybersecurity & Information Security Standards
  • Global Quality & Compliance Standards
  • EU Market Compliance & Safety Standards
  • Sustainable Product Certifications
  • Export Compliance & Product Safety Standards
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    What Wastewater Treatment Plants suppliers provide

    Suppliers in this category cover complete wastewater treatment plants as well as individual process stages, including screening, sedimentation, biological treatment, and sludge handling. Plant sizes range from compact systems for smaller municipalities or industrial sites to large-scale municipal facilities. Core competence lies in matching treatment technology to influent characteristics, discharge requirements, and available space. Many suppliers also provide engineering, installation, and commissioning services, alongside operation and maintenance support once a plant is running. Distinguish this category from Pumping Stations, which move water without treating it, and from Water Treatment & Disinfection, which focuses on potable and process water quality rather than wastewater. In the pre-selection phase, compare which plant sizes and industries each supplier specialises in, and confirm their experience with your specific influent type before shortlisting.

    Relevant standards

    Municipal wastewater treatment in the EU is governed by the Urban Wastewater Treatment Directive (91/271/EEC), which sets collection and treatment requirements based on population equivalent. Small on-site and package treatment plants are commonly built to EN 12566. Supplier quality and environmental management is typically certified to ISO 9001 and ISO 14001.

    Frequently asked questions

    What size of wastewater treatment plant do I need?
    Plant size depends on population equivalent or industrial flow volume and load; suppliers typically size systems based on influent data and discharge requirements rather than a fixed catalogue size.

    Is a wastewater treatment plant the same as a pumping station?
    No. A treatment plant removes contaminants from wastewater; a pumping station transports water or wastewater between locations without treating it.