According to Fortune Business Insights, the global Water and Wastewater Treatment Market size was valued at USD 372.39 billion in 2025 and is projected to grow from USD 400.32 billion in 2026 to USD 713.96 billion by 2034, exhibiting a CAGR of 7.50% during the forecast period from 2026 to 2034. North America dominated the market with a 38.20% share in 2025.
The market's expansion is being supported by stringent environmental regulations, increasing water stress, infrastructure investments, industrialization, and the adoption of smart water management technologies.
Water and wastewater treatment involves a broad range of chemicals, equipment, and services designed to make water suitable for consumption, industrial processes, reuse, or safe discharge. The market covers chemicals such as coagulants, flocculants, disinfectants, pH conditioners, scale and corrosion inhibitors, and antifoam chemicals. Equipment includes filtration, biological treatment, sludge treatment, disinfection, and demineralization systems, while services include designing, installation, operations, and maintenance.
The COVID-19 pandemic temporarily affected the industry. According to the source, industrial water demand declined by approximately 27% during FY 2019–2020, while emergency measures implemented by governments affected the revenues of municipal water treatment authorities.
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The increasing adoption of smart water and wastewater treatment technologies is a major market trend. Industrial modernization is encouraging treatment operators to use advanced technologies that can improve service quality while controlling operating expenses. Smart systems can monitor treatment processes, identify operational failures, and support timely corrective actions.
For example, Veolia Water Technologies developed CISPEO, a solution designed for the smart management of wastewater treatment plants. Advanced treatment facilities can also produce higher-quality sludge that may be used for energy production or recycled for agricultural applications.
Water reuse, desalination, and advanced treatment technologies are gaining importance as governments and industries respond to water scarcity. This trend is particularly visible in regions facing rapid population growth, industrialization, and limited freshwater resources.
One of the major factors driving the Water and Wastewater Treatment Market is the implementation of stringent regulations for effluent treatment. Governments and regulatory agencies are establishing strict limits on industrial and municipal wastewater discharge to control water pollution and improve environmental sustainability.
Organizations such as the U.S. Environmental Protection Agency and the European Union through its Water Framework Directive impose water-quality requirements that encourage industries and municipalities to adopt advanced treatment technologies.
Rapid urbanization and population growth are placing additional pressure on existing water resources and wastewater infrastructure. Increasing urban populations generate larger quantities of domestic wastewater, requiring municipalities to expand and modernize treatment facilities. Developing regions with inadequate sanitation infrastructure also require substantial investment to address water pollution.
Industries such as food and beverage, pharmaceuticals, power generation, pulp and paper, oil and gas, and petrochemicals require treated water for various operations. Growing industrial activity is therefore creating demand for reliable treatment technologies, including demineralization and advanced filtration.