Water treatment chemicals are essential across China’s municipal utilities, manufacturing plants, power facilities, mining operations, chemical production sites, food-processing units, and commercial infrastructure. These substances help remove suspended solids, control microbial growth, adjust pH, limit corrosion, prevent scale formation, and improve water quality. Their use supports drinking-water treatment, industrial process water, wastewater management, and water reuse across increasingly complex operating environments.
A recent study by MarkNtel Advisors highlights that the China water treatment chemicals sector was valued at USD 7.44 billion in 2025. It is projected to grow from USD 8.02 billion in 2026 to USD 12.18 billion by 2032, registering a CAGR of 7.2% during 2026–2032. This growth reflects industrial activity, urban water requirements, wastewater treatment, environmental controls, and increasing attention to water reuse.
Municipal Treatment Supports Safe Supply
Municipal water-treatment facilities use chemicals during coagulation, flocculation, disinfection, pH adjustment, and sludge management. Coagulants destabilize fine particles that remain suspended in untreated water, while flocculants help combine those particles into larger groups that can be separated through sedimentation or filtration.
The U.S. Environmental Protection Agency’s treatment guidance explains that coagulation and flocculation are used to remove small inorganic and organic colloidal materials from water. Correct chemical selection and dosage depend on raw-water quality, turbidity, temperature, alkalinity, and the treatment equipment used by each facility.
Industrial Activity Expands Chemical Use
Industrial facilities require water for cooling, steam generation, washing, product preparation, equipment cleaning, and manufacturing processes. Untreated water can contain minerals, microorganisms, suspended particles, and dissolved substances that affect production systems. Treatment chemicals help facilities maintain water quality while protecting equipment from corrosion, deposits, biological growth, and premature wear.
Power generation, petrochemicals, steel, electronics, pharmaceuticals, textiles, and food processing have different treatment requirements. Operators must therefore evaluate water chemistry, system temperature, pressure, circulation rate, material compatibility, and discharge conditions before selecting corrosion inhibitors, antiscalants, biocides, coagulants, or pH-control agents.
Wastewater Control Strengthens Demand
Industrial and municipal wastewater may contain organic matter, nutrients, metals, oils, suspended solids, and other pollutants. Treatment chemicals support contaminant separation, sludge conditioning, odour control, neutralization, and disinfection before water is discharged or prepared for reuse.
China’s Ministry of Ecology and Environment has emphasized the need to upgrade sewage-treatment facilities and improve wastewater collection. Such infrastructure development increases the need for dependable treatment programs that can respond to changing pollutant loads while meeting applicable discharge and operational requirements.
Water Reuse Shapes Treatment Strategies
Water reuse is becoming increasingly relevant for industrial plants and urban infrastructure seeking to reduce dependence on freshwater supplies. Treated wastewater may be used for cooling, landscaping, cleaning, construction, or selected manufacturing processes when it meets the required quality standards.
Reuse systems often require additional treatment because residual salts, microorganisms, suspended particles, or organic compounds may interfere with downstream applications. Operators may combine chemical treatment with membranes, filtration, biological processes, and ultraviolet disinfection. Effective pretreatment also helps protect membranes from fouling and scaling, which can reduce system performance.
Drinking-Water Quality Requires Careful Control
Chemical treatment must improve water quality without creating unacceptable residuals or treatment by-products. Facilities therefore monitor dosage, contact time, pH, turbidity, disinfectant levels, and other operating indicators. Laboratory testing and continuous monitoring allow operators to adjust treatment according to changes in source-water conditions.
The World Health Organization’s drinking-water guidelines provide an international basis for managing microbial, chemical, and physical risks in drinking-water systems. These guidelines emphasize preventive risk management across the complete water supply chain rather than relying only on final-stage testing.
Digital Monitoring Improves Chemical Efficiency
Automated dosing systems and online sensors are improving how treatment chemicals are managed. Instruments can track conductivity, pH, turbidity, oxidation-reduction potential, flow, and residual disinfectant levels. This information allows facilities to adjust chemical application according to real-time conditions instead of using fixed quantities.
More precise dosing can reduce chemical waste, operating costs, sludge generation, and the risk of under-treatment or excessive application. As China continues to strengthen industrial water management, wastewater control, and reuse infrastructure, treatment chemicals will remain important to maintaining reliable water quality and protecting essential equipment.
