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China Water Treatment Chemicals Market Trends and Insights

Rapid Capacity Additions in Coal and Nuclear Power Plants

In the first half of 2025, an uptick in nuclear generation offset a downturn in coal output. Yet, both nuclear and coal technologies remain pivotal for base-load supply, directly impacting the consumption of boiler water and cooling-tower chemicals. Annually, a standard nuclear unit consumes a notable quantity of scale inhibitors, biocides, and pH conditioners. Ultra-supercritical coal units, however, have an even higher demand. This heightened requirement stems from elevated steam conditions that intensify corrosion risks, making specialty filming amines and oxygen scavengers essential. Consequently, even with the growing prominence of renewables, there is a steady demand for high-purity treatment chemistries.

Stricter Industrial Wastewater Discharge Standards

During 2024鈥�2025, the MEE revised seven national discharge standards, tightening the COD and AOX thresholds for effluents from pesticides, slaughterhouses, and chlor-alkali operations. Industrial parks along the Yangtze River Economic Belt have adopted advanced oxidation and membrane stages, leading to increased dosing of coagulants and flocculants. Shandong has introduced stricter provincial regulations, favoring chemical suppliers that provide bundled technical optimization services, particularly with operators eager to ensure compliance.

Municipal WWTP Upgrades Under the 14th Five-Year Plan

Urban capacities have expanded, and nutrient-removal retrofits have been prioritized, with a focus on composite coagulants and high-molecular-weight PAM, supported by public investments. In response to tightening effluent quality limits, the draft of the 15th Plan aims to further increase per-cubic-meter chemical usage during the forecast period of 2026鈥�2031.

ZLD Mandates in Lithium-Battery Manufacturing Hubs

In 2025, battery clusters in Jiangxi, Sichuan, and Qinghai produced high-salinity wastewater. The ZLD systems, employing evaporation and reverse osmosis (RO), treated these streams. Remarkably, these systems utilized antiscalants and membrane cleaners at rates up to tenfold compared to conventional plants^{[1]Journal of Membrane Science, 鈥淶ero Liquid Discharge Systems for Lithium Battery Manufacturing Wastewater,鈥� sciencedirect.com}.

Tight Limits on Chlorinated Organics

The toxic-pollutant catalogue is steering users toward UV, ozone, or peracetic acid disinfection methods, while simultaneously reducing the reliance on chlorine-based biocides. Larger municipal plants have the financial capacity to make this transition; however, cost-sensitive industries are delaying adoption. This delay is splitting demand into green and legacy segments.

Raw-Material Price Volatility

In 2025, environmental inspections limited acrylamide production, resulting in price fluctuations for PAM inputs. Similarly, the markets for caustic soda and alum experienced volatility, which placed pressure on the margins of suppliers operating under fixed-price municipal contracts.

Segment Analysis

By Product Type: Coagulants Retain Lead While Green Chemistries Accelerate

In 2025, coagulants and flocculants accounted for 23.80% of the revenue and are projected to grow at a CAGR of 8.92% during the forecast period of 2026鈥�2031. Utilities are increasingly adopting composite PAC blends, which reduce residual aluminum and minimize sludge volumes, providing them with greater regulatory flexibility. Although still an emerging segment, bio-based flocculants and specialty polymers designed for PFAS removal are gaining traction as buyers increasingly seek options with lower toxicity. The industry is undergoing a shift: corrosion and scale inhibitors are transitioning from phosphonate to polycarboxylate bases, and biocides are moving to non-chlorine actives to comply with AOX caps. By 2031, the market for coagulants in the Asia-Pacific region's water treatment sector, particularly in China, is expected to represent a substantial share of the total market value.

Silicone and polyglycol defoamers are gaining adoption in the pulp, paper, and mining industries, although their market share remains limited. The approach to PFAS solutions demonstrates how even niche contaminants can command premium margins despite their limited volume. Suppliers offering on-site technical services are securing longer-term contracts in the competitive water treatment chemicals market in the Asia-Pacific region.

Note: Segment shares of all individual segments available upon report purchase

By Application: Cooling Dominates, Yet Green Water Treatment Outpaces

In 2025, cooling water treatment accounted for 32.19% of total revenue, driven by significant industrial cooling demands from sectors like power, steel, petrochemicals, and data centers. For instance, a 600 MW coal unit circulates large volumes of water per hour, adding substantial amounts of inhibitors and biocides, underscoring a consistent chemical demand. Meanwhile, the green water treatment segment, utilizing bio-based, phosphorus-free chemistries and electrochemical AOPs, boasts the fastest growth at a 9.95% CAGR. This surge is fueled by provincial phosphorus regulations set below specific thresholds and corporate ESG commitments. By 2031, the market for green water treatment chemicals in China is expected to grow significantly.

Currently, wastewater treatment commands a notable share of the revenue, benefiting from the adoption of MBR and RO technologies, particularly in regions with stringent ZLD policies. The rise of membrane systems has heightened the demand for premium antiscalants and cleaners, emphasizing value over sheer volume in China's water treatment chemicals landscape.

By End-User Industry: Municipal Plants Anchor Growth, Industry Diversifies

Municipal operators, holding a 40.91% share of the 2025 market value, are projected to maintain an 8.97% CAGR during the forecast period of 2026鈥�2031, driven by continuous upgrades and expansions into rural areas. A typical wastewater treatment plant (WWTP) allocates a significant portion of its operational costs to PAC, PAM, and disinfectants. In the power sector, nuclear expansions have offset the gradual phase-out of coal, resulting in a steady demand for high-purity chemicals. Chemical manufacturing, ranked third in the market, is notably the most intensive in terms of chemical usage per cubic meter treated, particularly due to Shandong鈥檚 stringent COD regulations. The market also receives contributions from the mining, commercial, and electronics sectors. Notably, the demand for ultrapure water in semiconductor fabs has created lucrative opportunities for ion-exchange resins and EDI modules.

Note: Segment shares of all individual segments available upon report purchase

Geography Analysis

Three key regions drive China's national chemical demand: the Yangtze River Delta (YRD), the Pearl River Delta (PRD), and the Bohai Rim. In the YRD, industrial parks operate large-scale wastewater treatment plants (WWTPs). These parks impose discharge limits that surpass national standards, leading to heightened chemical usage per cubic meter. A flagship park in Shanghai exemplifies the benefits of centralized utilities, achieving economies of scale in advanced treatments such as catalytic oxidation and MBR filtration. These advancements have subsequently increased the demand for premium polymers and specialized membrane cleaners.

Coastal regions in Shandong, Guangdong, and Fujian are heavily investing in large-scale seawater desalination projects. Their aim is to ensure a steady water supply for the petrochemical and fine-chemical industries. SUEZ's Penglai plant has established a benchmark in industrial desalination costs. Utilizing reverse osmosis (RO) antiscalants and cleaners, the plant is specifically engineered to endure high-salinity brines^{[2]SUEZ, 鈥淧englai Industrial Desalination Plant Commissioning Release,鈥� suez.com}. Meanwhile, in the PRD, local governments are actively monitoring PFAS levels at industrial park boundaries. This vigilance has spurred pilot projects that employ GAC and ion-exchange adsorbents, further driving up the demand for specialty chemicals.

Inland regions are experiencing rapid growth. Sichuan is emerging as a battery hub, Henan is cultivating a chemicals cluster, and western salt-lake lithium basins are gaining traction. In these regions, zero liquid discharge (ZLD) mandates have spurred a notable increase in antiscalant usage, surpassing volumes typically seen in standard effluent treatment plants. Despite some enforcement gaps, regional players are leveraging pricing strategies. Conversely, multinational corporations are focusing on coastal areas with stricter regulations, creating a divided landscape in China's water treatment chemicals market.