Hawkins Reaches Key Milestone with Water Treatment Technology

Hawkins, Inc. Announces Milestone for its WaterSurplus NanoStack™ Membrane CoaƟng ROSEVILLE, Minn., February 2, 2026 – Hawkins, Inc. (Nasdaq: HWKN), a leading water treatment and specialty ingredients company, today announced the successful compleƟon of a mulƟ-year pilot test featuring WaterSurplus’ patented NanoStack™ coated membranes at the Orange County Water District’s (OCWD) Groundwater Replenishment System (GWRS).

WaterSurplus is a wholly owned subsidiary of Hawkins, Inc. and is located in Loves Park, IL. Based on the successful pilot, OCWD will install 1,050 NanoStack™ coated membranes at GWRS, the world’s largest advanced water purificaƟon system for potable water reuse. This quanƟty represents one full reverse osmosis train, treaƟng approximately 5 million gallons of water per day for indirect potable reuse. Pilot tesƟng data demonstrated that NanoStack™ technology significantly improved fouling resistance, cuƫng clean-in-place requirements by more than half, and reducing RO energy consumpƟon by more than 15%.

Given that energy is one of the largest operaƟng costs for advanced water treatment faciliƟes, these savings are esƟmated to enable a payback period of less than two years, according to WaterSurplus’ Chief Technology Officer, Dr. Dileep Agnihotri. NanoStack™ is an NSF/ANSI/CAN 61-cerƟfied hydrophilic membrane surface modificaƟon that is applied to finished RO membrane elements.

This advanced coaƟng enhances membrane durability and performance, helping customers across industries achieve more reliable long-term operaƟon with lower lifecycle costs. For more informaƟon about NanoStack™ and other WaterSurplus products, services, and capabiliƟes, please visit watersurplus.com. About Hawkins, Inc.

Hawkins, Inc. was founded in 1938 and is a leading water treatment and specialty ingredients company that formulates, manufactures, distributes and blends products for its Water Treatment, Food & Health Sciences and Industrial SoluƟons customers. Headquartered in Roseville, Minnesota, the Company has 65 faciliƟes in 28 states and creates value for its customers through superb customer service and support, quality products and personalized applicaƟons. Hawkins, Inc. generated $974 million of revenue in fiscal 2025 and has approximately 1,100 employees. For more informaƟon, including registering to receive email alerts, please visit www.hawkinsinc.com/investors. Contact: Jeffrey P. Oldenkamp ExecuƟve Vice President and Chief Financial Officer 612/331-6910 ir@hawkinsinc.com

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Taxonomy

• Treatment
• Reverse Osmosis
• Technology
• Reverse Osmosis
• Minnesota, United States
• water treatment
• Membrane