Wastewater Treatment Plant O&M: Market Size & Forecast 2026

The global wastewater treatment plant operation and maintenance market sits at approximately USD 78.5 billion in 2025 (base year), growing at a 5.8% CAGR through 2032 to reach roughly USD 116 billion. Energy and electricity consumption accounts for 30-40% of total plant O&M costs, with aeration processes alone consuming up to 60% of plant electricity demand. The sector is structurally tight: demand is sustained by ageing infrastructure, tightening discharge standards, and expanding municipal sewerage networks across emerging economies, while supply is concentrated among a handful of global service operators with long-term concession assets. > **Analyst Take.** The call is to treat electricity as the primary commodity hedge, not a fixed overhead. Buyers who locked three-year fixed-price O&M contracts in 2022-2023 are now 15-25% above market on the energy component alone. The right sequenc

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