Biological Wastewater Treatment Market Report 2026

The biological wastewater treatment market size has grown strongly in recent years. It will grow from $11.92 billion in 2025 to $12.85 billion in 2026 at a compound annual growth rate (CAGR) of 7.8%. The growth in the historic period can be attributed to growing urbanization and municipal wastewater generation, rising environmental awareness, implementation of wastewater discharge norms, expansion of industrial wastewater treatment needs, development of biological treatment technologies.

The biological wastewater treatment market size is expected to see strong growth in the next few years. It will grow to $17.37 billion in 2030 at a compound annual growth rate (CAGR) of 7.8%. The growth in the forecast period can be attributed to increasing investment in wastewater infrastructure, rising need for sustainable water management, growth in adoption of advanced biological reactors, expanding industrial compliance requirements, stronger focus on water reuse and recycling initiatives. Major trends in the forecast period include increasing adoption of advanced biological treatment systems, rising focus on municipal wastewater purification efficiency, growing emphasis on industrial effluent management, expansion of membrane based biological treatment solutions, increasing integration of monitoring and control systems.

The rise in water pollution and the deteriorating quality of water are expected to propel the growth of the biological wastewater treatment market going forward. Water pollution refers to the release of harmful substances into groundwater, lakes, streams, rivers, estuaries, and oceans to levels that interfere with the beneficial use of water. Increasing industrialization, urbanization, and inadequate wastewater management practices have significantly contributed to this problem. Biological wastewater treatment systems address these challenges by using naturally occurring microorganisms to decompose organic pollutants and remove contaminants from wastewater in an efficient and environmentally friendly manner. For instance, in July 2024, according to reports published by the Environment Agency, a UK-based government body, there were 1,658 sewerage pollution incidents recorded in 2022, which increased to 1,902 incidents in 2023. Therefore, the rising incidence of water pollution and growing industrial activities are driving the expansion of the biological wastewater treatment market.

Major companies operating in the biological wastewater treatment market are focusing on launching innovative products, such as advanced max series treatment units, to drive revenue growth and strengthen their market presence. Max series units feature advanced designs and materials that deliver high efficiency, reliability, and durability while minimizing maintenance costs and operational downtime due to their ease of installation, operation, and upkeep. For instance, in July 2023, BioGill Operations Pty Ltd., an Australia-based company specializing in biological wastewater treatment solutions, launched its Max Series. This product launch highlights BioGill’s commitment to providing cost-effective and efficient wastewater treatment solutions across a wide range of industries. The Max Series, including Max 2, Max 4, and Max 6 units, is designed to deliver improved treatment performance at a lower cost. These units offer exceptional efficiency and longevity, while their user-friendly design reduces maintenance requirements and downtime.

In September 2024, Axius Water, a US-based provider of water quality management services focused on improving the effectiveness of water and wastewater treatment, acquired MITA Water Technologies for an undisclosed amount. This acquisition aims to bolster Axius's mission of addressing nutrient pollution in wastewater management. MITA Water Technologies is an Italian company that specializes in designing, manufacturing, and marketing equipment for the purification and filtration of both municipal and industrial wastewater.

Major companies operating in the biological wastewater treatment market report are Veolia Environnement S.A., Suez Water Technologies & Solutions, Aquatech International B.V., Evoqua Water Technologies Corporation, Xylem Inc., Pentair Plc, Kurita Water Industries Ltd., Hitachi Ltd., Mitsubishi Chemical Corporation, Siemens Aktiengesellschaft, Danaher Corporation, DAS Environmental Expert GmbH, Condorchem Envitech, Samco Technologies Inc., Water Energy Technologies LLC, BioGill, Industrial Phycology Inc., Ovivo, Paques, Aquarion Group.

North America was the largest region in the biological wastewater treatment market share in 2025. Asia-Pacific is expected to be the fastest-growing region in the forecast period. The regions covered in the biological wastewater treatment market report are Asia-Pacific, South East Asia, Western Europe, Eastern Europe, North America, South America, Middle East, Africa. The countries covered in the biological wastewater treatment market report are Australia, Brazil, China, France, Germany, India, Indonesia, Japan, Taiwan, Russia, South Korea, UK, USA, Canada, Italy, Spain.

The biological wastewater treatment market includes revenues earned by providing bioremediation of wastewater, phytoremediation of wastewater, and mycoremediation of wastewater. The market value includes the value of related goods sold by the service provider or included within the service offering. Only goods and services traded between entities or sold to end consumers are included.

The market value is defined as the revenues that enterprises gain from the sale of goods and/or services within the specified market and geography through sales, grants, or donations in terms of the currency (in USD unless otherwise specified).

The revenues for a specified geography are consumption values that are revenues generated by organizations in the specified geography within the market, irrespective of where they are produced. It does not include revenues from resales along the supply chain, either further along the supply chain or as part of other products.

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