Wastewater Treatment Plant Market Report 2026

The wastewater treatment plant market size has grown strongly in recent years. It will grow from $141.65 billion in 2025 to $149 billion in 2026 at a compound annual growth rate (CAGR) of 5.2%. The growth in the historic period can be attributed to expansion of urban wastewater infrastructure, rising industrial effluent generation, tightening environmental discharge regulations, adoption of biological treatment methods, growth of municipal sewage systems.

The wastewater treatment plant market size is expected to see strong growth in the next few years. It will grow to $182.19 billion in 2030 at a compound annual growth rate (CAGR) of 5.2%. The growth in the forecast period can be attributed to increasing investments in advanced wastewater treatment, rising demand for decentralized treatment solutions, expansion of water reuse applications, growing adoption of digital plant management, increasing focus on energy-efficient treatment processes. Major trends in the forecast period include increasing deployment of advanced treatment technologies, rising adoption of smart monitoring systems, growing focus on water reuse and recycling, expansion of membrane and hybrid treatment processes, enhanced emphasis on operational efficiency.

The rising levels of water pollution are expected to drive the growth of the wastewater treatment plant market going forward. Water pollution occurs when harmful substances contaminate water bodies, making them unsafe for human use or harmful to ecosystems. Tackling water pollution requires coordinated efforts to implement effective solutions such as enhanced water monitoring and advanced wastewater treatment technologies. Wastewater treatment plants play a critical role in this process by treating and managing wastewater, protecting water quality, and supporting sustainable water management practices. For instance, in August 2025, the Environment Agency, a UK-based government department, reported that in 2024, pollution incidents from sewerage and water supply assets increased by 29% compared with 2023, a rise deemed unacceptable. Therefore, the increasing levels of water pollution are propelling growth in the wastewater treatment plant market.

Major companies in the wastewater treatment plant market are focusing on developing advanced solutions, such as high‑strength peracetic acid (PAA) antimicrobial control systems, to enhance microbial management efficiency. These systems utilize concentrated PAA to rapidly disinfect and control microbial growth in water and wastewater treatment processes. For instance, in September 2025, Enviro Tech, a U.S.-based specialty chemical manufacturer and subsidiary of Arxada, launched **Peragreen 26WW**, an innovative antimicrobial solution designed to improve wastewater treatment efficiency and operational sustainability. The product features a biodegradable PAA formulation that quickly reduces microbial contaminants, integrates seamlessly with existing infrastructure without major upgrades, and lowers overall chemical consumption and maintenance costs for treatment facilities.

In October 2023, BW Group Limited, a US-based maritime company specializing in shipping, floating gas infrastructure, and deep-water oil and gas production, acquired SafBon Water Technology Inc. for an undisclosed sum. The acquisition aims to enhance BW Water's position in the water and wastewater treatment industry, particularly in the Americas, and tap into new markets with desalination capabilities in Asia, integrating SafBon Water Technology into the BW Water brand. SafBon Water Technology Inc. is a US-based company providing advanced water and wastewater treatment systems.

Major companies operating in the wastewater treatment plant market are Hitachi Ltd., Veolia Environnement S.A., Mitsubishi Chemical Aqua Solutions, Larsen & Toubro Limited, Nalco Water India Ltd., Kubota Corporation, Suez Environment S.A., Xylem Inc., Pentair PLC, ITT Corporation, Evoqua Water Technologies Corporation, Fluence Corporation, Thermax Ltd., Triveni Engineering & Industries Ltd., Doshion Veolia Water Solutions Pvt. Ltd., Kemisan Klor-Alkali A.S., Ion Exchange India Ltd., FilterBoxx Inc., Organica Water, Paramount Limited, Bioxica, GE Water And Process Technologies, TMW Technologies, VA Tech Wabag Ltd., ECOfluid Systems Inc., Aquatech International LLC, Danaher Corporation, Doosan Heavy Industries & Construction Co. Ltd., Kurita Water Industries Ltd., Toshiba Water Solutions Private Limited.

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

The wastewater treatment plant market consists of revenues earned by entities by providing services such as wastewater collection, monitoring, sludge treatment and disposal, resource recovery, and stormwater management. The market value includes the value of related goods sold by the service provider or included within the service offering. The wastewater treatment plant market also includes sales of screens, pumps, grit chambers, primary clarifiers, aeration tanks, secondary clarifiers, filters, disinfection units, sludge treatment equipment, control systems, and piping with valves. Values in this market are ‘factory gate’ values, that is the value of goods sold by the manufacturers or creators of the goods, whether to other entities (including downstream manufacturers, wholesalers, distributors and retailers) or directly to end customers. The value of goods in this market includes related services sold by the creators of the goods.

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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