Australia And New Zealand Water Treatment Chemicals - Market Share Analysis, Industry Trends & Statistics, Growth Forecasts (2026-2031)

The australia and new zealand water treatment chemicals market size is expected to increase from USD 612.34 million in 2025 to USD 643.69 million in 2026 and reach USD 826.24 million by 2031, growing at a CAGR of 5.12% over 2026-2031. This report is Segmented by Product Type (Coagulants and Flocculants, Biocides and Disinfectants, and More), End-User Industry (Municipal, Power Generation, Oil and Gas, Chemical Manufacturing, Mining and Mineral Processing, Food and Beverage, Pulp and Paper, and More), and Geography (Australia and New Zealand). The Market Forecasts are Provided in Terms of Value (USD).

Australia And New Zealand Water Treatment Chemicals Market Trends and Insights

Growing Water-Intensive Industrial and Power Demand

Mining and LNG operations in Western Australia and Queensland are driving higher process-water volumes, leading to increased consumption of coagulants, flocculants, and corrosion inhibitors. For instance, Newmont’s Cadia Valley Operations reused 68% of water in 2024, but the remaining flow still required ferric sulfate and phosphonate inhibitors. CSIRO pilot trials demonstrated that hybrid forward- and reverse-osmosis brine streams require up to 5 ppm of anionic polyacrylamide for tailings dewatering. Coal-fired units in New South Wales and Queensland use bromine oxidizers and zinc-phosphate blends to manage cycles of concentration exceeding five. Geothermal plants in New Zealand employ customized silica dispersants to control precipitation at 180 °C. Industrial applications consume two to three times more chemicals per megaliter than municipal systems, meaning a 4% increase in mining water throughput could raise specialty chemical demand by up to 10%.

Stricter Wastewater-Discharge Licensing Under ANZECC 2023

The ANZECC 2023 update introduced stricter numeric limits for nutrients and trace metals, compelling utilities to enhance dosing regimes. Sydney Water’s 2026 tender specifies ferric chloride and polyaluminum chlorhydrate for nutrient co-precipitation, with quarterly compliance audits. In 2025, Te Awamutu added alum to meet Waikato phosphorus caps, increasing annual chemical expenditure by NZD 150,000. Older plants built before 2010 lack automated pH control, necessitating retrofits that accelerate chemical-infrastructure investments. Victoria’s regulator has indicated tighter phosphorus limits by 2028, ensuring sustained demand for iron- and aluminum-based coagulants.

Membrane/UV Displacement of Chemical Disinfection

Between 2024 and 2025, fifteen New Zealand plants adopted UV systems, reducing hypochlorite usage by up to 70%. Greater Western Water’s Myrniong upgrade eliminated 40 tons per year of hypochlorite and reduced trihalomethanes by 60%. Membrane bioreactors (MBRs) at Wellsford and Paeroa decreased alum demand by 30-40%. While UV systems still require pH adjusters and a small chlorine residual, the overall effect is a reduction in biocide demand for smaller utilities receiving central funding.

Other drivers and restraints analyzed in the detailed report include:

• Mandated PFAS Removal Standards Boosting Specialty Coagulants
• Hydrogen-Electrolyzer Build-Out Demanding Ultrapure Make-Up Water
• Impending Phosphorus Caps Curbing Phosphonate Antiscalants

For complete list of drivers and restraints, kindly check the Table Of Contents.

Segment Analysis

Coagulants and flocculants accounted for 23.11% of revenue in 2025, representing the largest share of the water treatment chemicals market. This segment is projected to grow at a CAGR of 5.96% through 2031, driven by increasing PFAS removal requirements and DAF retrofits, which are leading to more frequent dosing events. For instance, the Mardi Water Treatment Plant transitioned from alum to ferric chloride following a USD 50 million upgrade, reducing dosage by 12% while improving turbidity removal. HydraBOND and HydraPRIME polymers are designed for sediment basins and mine-water clarification, achieving flocculation in under 60 seconds. While biocides face challenges from UV treatment technologies, they remain essential for maintaining cooling-tower residuals. Phosphorus-free antiscalants are gaining adoption in desalination applications, though their higher costs have slowed full-scale replacement. Specialty coagulants are enhancing cold-water floc settling in New Zealand’s South Island, reflecting climate-driven adjustments in formulations. The market size for coagulants is expected to grow steadily as regulatory compliance increases dosing intensity rather than throughput.

Demand for corrosion inhibitors, defoamers, and pH adjusters is closely tied to industrial cycles. Zinc-phosphate blends are effective in protecting cooling systems operating above five cycles of concentration, while amine-based filming inhibitors safeguard condensate lines in LNG plants. Vital Chemical’s bio-polymer flocculant recently received approval from the Infrastructure Sustainability Council, indicating a preference for products with lower life-cycle emissions. Defoamers and pH adjusters remain commoditized but are critical for applications such as pulp-and-paper water closure and clean-in-place processes. Overall, growth at the product level is driven more by regulatory-led chemistry substitutions than by volume expansion, favoring suppliers with strong R&D capabilities.

Complete Report Scope:

• By Product Type
  • Coagulants and Flocculants
  • Biocides and Disinfectants
  • Corrosion Inhibitors
  • Scale Inhibitors and Antiscalants
  • Defoamers and Defoaming Agents
  • pH Adjuster and Softener
  • Other Product Types
• By End-user Industry
  • Municipal
  • Power Generation
  • Oil and Gas
  • Chemical Manufacturing
  • Mining and Mineral Processing
  • Food and Beverage
  • Pulp and Paper
  • Other End-user Industries
• By Geography
  • Australia
  • New Zealand

List of Companies Covered in this Report:

• Accepta Ltd
• Albemarle Corporation
• Aquasol
• Buckman
• Chemdrex Chemicals
• Coogee
• Dow
• Ecolab
• IWTS Group Pty Ltd
• Ixom
• Kemira Oyj
• SNF
• Solenis
• Solvay
• Veolia

Additional Benefits:

• The market estimate (ME) sheet in Excel format
• 3 months of analyst support