State of Industrial Water & Wastewater Management 2026
Industry takes about a fifth of the world's freshwater and returns much of it dirtier than it found it — yet most wastewater globally is still discharged without treatment. As water stress and discharge rules tighten, treatment, reuse and energy-efficient water handling are becoming core plant infrastructure rather than a compliance afterthought. This report compiles the public figures on where industrial water and wastewater management stands in 2026.
Industry uses about a fifth of the world's freshwater
Industry and energy together account for roughly 19% of global freshwater withdrawals, behind agriculture at around 69% and ahead of municipal use at about 12%, according to UN figures. That headline understates the local picture: the industrial share runs from as little as 5% of withdrawals in some regions to well over half in heavily industrialised economies. For a plant operator, water is therefore both a rising input cost and a growing licence-to-operate risk, which is what pushes metering, recycling and discharge control up the agenda.
Most wastewater is still discharged untreated
The defining gap in water management is not collection but treatment. Globally, over 80% of all wastewater — and over 95% in some of the least developed economies — is released to the environment without any treatment. Treatment rates track income closely: high-income countries treat about 70% of the municipal and industrial wastewater they generate, falling to roughly 38% in upper-middle-income countries, 28% in lower-middle-income ones and just 8% in low-income economies. That untreated discharge degrades the same water bodies industry later draws from, which is why on-site industrial effluent treatment is increasingly mandated rather than optional.
Treatment is a growing — and energy-hungry — market
Source: Grand View Research — Industrial Water Treatment Market Size, Industry Report 2033 (2025)
The equipment behind industrial water and wastewater handling is a steadily expanding category. The industrial water treatment market was valued at about USD 46 billion in 2024 and is projected to reach roughly USD 72 billion by 2033, a compound growth rate near 5% a year, driven by stricter discharge limits and reuse mandates. The catch is energy: the water sector already consumes around 4% of global electricity, and that share is set to climb as energy-intensive options such as desalination and advanced membrane treatment scale. Water and energy management are therefore converging — every cubic metre treated, pumped or reused carries an electricity bill that on-site efficiency and reuse can cut.
FAQ
How much water does industry use?
Industry and energy account for roughly 19% of global freshwater withdrawals, against about 69% for agriculture and 12% for municipal supply, according to UN figures. The industrial share varies enormously by region, from around 5% of withdrawals in some areas to more than half in heavily industrialised economies.
Why is so much wastewater released untreated?
Treatment capacity tracks income and infrastructure. Over 80% of the world's wastewater is discharged without treatment, with high-income countries treating about 70% of their municipal and industrial effluent but low-income economies treating only around 8%. Treatment is energy- and capital-intensive, so coverage lags behind collection where funding and enforcement are weak.
Sources
- UNESCO (UN World Water Development Report) — Groundwater and Industry — UN World Water Development Report 2022
- UNESCO / UN-Water (UN World Water Development Report) — Wastewater: The Untapped Resource — UN World Water Development Report 2017
- Grand View Research — Industrial Water Treatment Market Size, Industry Report 2033
- IEA — Water-Energy Nexus — World Energy Outlook Special Report
Related
How to Reduce Industrial Energy Costs: Practical Quick Wins · Factory Decarbonization: A Practical Roadmap · Specific Energy Consumption (SEC) · Energy Management System (EnMS / EMS) · Net Zero
Sectors: Chemicals · Food Processing · Power Generation · Paper & Packaging