Phoslock Environmental Technologies Limited (ASX:PET) specializes in engineering solutions and water treatment products to remediate phosphorus-polluted freshwaters, including lakes, rivers, canals, wetlands and drinking water reservoirs. The company manufactures and supplies Phoslock, a proprietary lanthanum-modified bentonite clay that permanently binds excess phosphorus in the water column and sediments to form inert rhabdophane, preventing algal blooms and eutrophication; it also provides complementary services such as site-specific management strategies, initial sampling and diagnosis, product application engineering, post-treatment monitoring and reporting, custom-blended products for diverse water quality issues, and specialized application equipment. Founded in 2002 and headquartered in Sydney, Australia, Phoslock Environmental Technologies operates globally across Australia/New Zealand, Europe/UK through wholly owned subsidiaries Phoslock Water Solutions (UK) Ltd and Phoslock Europe GmbH, the United States/Canada/Brazil, and China, targeting municipal authorities, environmental agencies, golf courses, industrial clients and private water body owners. In January 2025, the company entered an exclusive distribution agreement with The Orion Companies for its Phoslock product range across the entire United States, enhancing market penetration in North America's key environmental sector; it resumed trading on the ASX in August 2025 following a two-year suspension after demonstrating going-concern status.