What Phoslock Environmental Technologies does

Phoslock Environmental Technologies Limited (ASX: PET) is an Australia-based water remediation company founded in 2002 that develops, manufactures and applies proprietary chemical treatments to permanently bind excess phosphorus in freshwater bodies. Its core product, Phoslock, is a lanthanum-modified bentonite clay originally developed by Australia's CSIRO in the 1990s and licensed to the company; one tonne of Phoslock binds 34 kg of phosphate (or 11 kg of phosphorus) by forming the naturally occurring, non-toxic mineral Rhabdophane, with the bond remaining stable across pH 4-11 and under anoxic conditions. A complementary product line, Phosflow (patented phosphorus-absorbing pellets), is sold under exclusive global distribution rights acquired from Water Warriors Inc. in August 2022.

The company generates revenue primarily through one-time product sales of Phoslock and Phosflow, supplemented by technical and application services spanning initial sampling, diagnosis, dosing, engineering and post-treatment monitoring. Pricing is quote-based and project-tied, with ticket sizes ranging from under $300,000 for small water bodies to over $6 million for very large deployments. Go-to-market combines direct sales to government water authorities and enterprise customers (via regional general managers and a multilingual website in 10 languages) with exclusive channel partnerships, most notably The Orion Companies for the entire United States market (announced January 2025). Manufacturing is conducted at a ~3,000 ton-per-year facility in Changxing, China, which is restarting production in January 2026 after a 2021 shutdown.

PET has treated more than 300 water bodies across 30+ countries and serves government water authorities, private water body owners and agricultural operations. The company underwent significant financial distress, including a two-year ASX trading suspension that was lifted on 15 August 2025 after the new board (installed January 2024) demonstrated going-concern status and progress toward cash-flow breakeven. The company holds 11-50 employees, is headquartered in Sydney, and is publicly listed on the Australian Securities Exchange.

Name

Phoslock Environmental Technologies

Legal name

Phoslock Environmental Technologies Limited

Website

https://petwatersolutions.com

Company type

Public

Founded year

2002

Operating status

Operating

Headcount range

11–50 employees

Short description

Phoslock Environmental Technologies (ASX: PET) is an Australia-based water remediation company that sells proprietary lanthanum-modified bentonite chemistry (Phoslock) and phosphorus-absorbing pellets (Phosflow) to government water authorities and private lake owners for permanent phosphorus binding in freshwater bodies.

Ownership category

akta.pro rank

Product category

Water Treatment Products

NAICS

Fertilizer and Compost Manufacturing (32531)

SIC

Industrial Inorganic Chemicals (2810)

akta.pro primary industry

Corrosion Control & Stabilization (pH/Alkalinity Adjustment, Phosphate Dosing) (EUANABAG)

akta.pro secondary industry

Soil Remediation & Immobilization Amendments (Bentonite, Zeolite, Phosphates) (AFABADAH)

Keywords

• Water treatment products
• Phosphorus removal solutions
• Freshwater remediation
• Lake water treatment
• Nutrient pollution control

Headquarters

HQ city

Sydney

HQ country

Australia

HQ region

Oceania

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Phoslock Product Sales: Sale of proprietary Phoslock water treatment product (lanthanum-modified bentonite) for phosphorus removal from freshwater bodies. Product is applied to water bodies to bind excess phosphorus and improve water quality.
2. Phosflow Product Sales: Sale of patented phosphorus absorbing pellets (Phosflow) under exclusive global distribution rights from Water Warriors Inc.
3. Technical and Application Services: Technical application and support services including initial sampling, diagnosis, application, engineering and post treatment monitoring and reporting. The company offers a complete service from sampling through to post-treatment monitoring.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Phoslock Environmental Technologies manufactures and supplies Phoslock, a proprietary lanthanum-modified bentonite clay product that permanently binds excess phosphorus in freshwater bodies by forming the naturally occurring inert mineral Rhabdophane. The company also distributes Phosflow, patented phosphorus-absorbing pellets under exclusive global rights, and provides complementary technical application services including water sampling, diagnosis, dosing, engineering, and post-treatment monitoring for government water authorities and private water body owners.

Product overview

PET offers Phoslock® as its core water treatment product for phosphorus removal from freshwaters, along with Phosflow as a complementary phosphorus-absorbing pellet product. Both products address eutrophication and nutrient pollution in water bodies through chemical binding of excess phosphorus. Phoslock uses lanthanum-modified bentonite technology developed by CSIRO, while Phosflow consists of patented phosphorus absorbing pellets. The company provides technical application services and support alongside its products.

Differentiator

Problem solved

Functional benefit

Brands

• Phoslock: Proprietary water treatment product that permanently binds excess phosphorus in water bodies. Consists of lanthanum-modified bentonite developed by CSIRO. Binds phosphate to form the naturally occurring mineral Rhabdophane.
• Phosflow

Products and services

• Phoslock Proprietary water treatment product consisting of lanthanum-modified bentonite clay that permanently binds excess phosphorus in freshwater bodies by forming the naturally occurring, non-toxic, inert mineral Rhabdophane. One tonne of Phoslock removes 34 kg of phosphate (or 11 kg of phosphorus), with the bond stable across pH 4-11 and under anoxic conditions. Accredited to NSF/ANSI/CAN 60 for drinking water applications and produced under ISO 9001:2015. Sold to government water authorities, private water body owners, and agricultural operations globally.
• Phosflow Patented phosphorus-absorbing pellets for water treatment applications. PET holds exclusive global distribution rights acquired from Water Warriors Inc. in August 2022. Used for phosphorus pollution control in water bodies as a complementary offering to the Phoslock product line.
• Technical and Application Services End-to-end technical application and support services provided alongside Phoslock and Phosflow product sales, including initial water sampling, diagnosis, dosing calculation, application, engineering, and post-treatment monitoring and reporting. Sold to government and enterprise customers as part of complete water remediation engagements.

Quantifiable outcome

• One tonne of Phoslock removes 34 kg of phosphate or 11 kg of phosphorus
• +3 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Three partnerships are on record, tiered core.

• Changxing Manufacturing Facility PartnerscoreImplementation/ SI/ Consulting Partner · 3 December 2025Manufacturing operations at the Changxing, China facility for Phoslock production. Refurbishment work undertaken over six months in preparation for production restart in January 2026. Initial annual production capacity of approximately 3,000 tons.
• The Orion CompaniescoreChannel Partner/ Reseller/ Distributor · 6 January 2025Exclusive distributor agreement for the United States market granted to The Orion Companies. The agreement grants Orion exclusive rights to market, sell, and distribute Phoslock's innovative range of water treatment products across the entire United States. Orion is a manufacturer, distributor and seller of herbicides, pesticides and fertilizers with business segments including industrial vegetation management, range and pasture, aquatics, forestry management and agriculture. Orion also offers enhanced services including custom blending, packaging, warehousing, and digital implementation. This partnership is expected to significantly expand Phoslock's presence in one of the world's largest markets for environmental technologies.
• Water Warriors Inc.coreChannel Partner/ Reseller/ Distributor · 5 August 2022Exclusive global distribution rights for patented phosphorus absorbing pellets (Phosflow). The product has been proven effective in treating phosphorus pollution in water bodies. This agreement extends PET's product portfolio and global market reach with complementary phosphorus treatment technology.

Scale indicators7 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Halosource (SeClear): Halosource produces SeClear, an aluminum-based phosphorus binding product for lakes and drinking water reservoirs. It is the closest direct chemistry competitor to Phoslock, offering an alternative low-dose P-binding solution to the same municipal and utility buyers.
• SePRO Corporation: SePRO is a US-based specialty chemical company focused on aquatic restoration, including phosphorus mitigation and algaecide/herbicide products for lakes, ponds, and reservoirs. It competes directly with Phoslock in the same government/municipal customer base using alternative chemistry and delivery formats.
• Earth Science Laboratories: Earth Science Laboratories manufactures and distributes specialty water treatment products for lakes, ponds, irrigation, and drinking water systems across the US. Its product portfolio overlaps with Phoslock's municipal and private water body applications, particularly around nutrient and algae control.
• Clean-Flo International: Clean-Flo designs and implements lake and pond aeration, circulation, and water quality restoration systems, including bioremediation products. It serves the same municipal and private lake owner segment with a more mechanical/biological approach versus Phoslock's chemical binding.
• BlueGreen Water Technologies: BlueGreen Water Technologies develops and applies proprietary lake-restoration treatments to combat cyanobacteria and restore water quality, with operations spanning multiple continents. It targets the same eutrophication and harmful algal bloom problem Phoslock addresses.

Broad incumbents

• Solenis: Solenis is a global specialty chemicals manufacturer serving water-intensive industries including municipal water treatment, pulp/paper, and oil & gas. Its broad water treatment chemical portfolio overlaps with parts of Phoslock's chemistry stack across industrial and municipal customers.
• Ecolab: Ecolab is a global leader in water, hygiene, and infection prevention solutions with extensive municipal and industrial water treatment chemical offerings. Its Nalco Water segment serves many of the same utility, industrial, and commercial customers Phoslock addresses, though at much broader scale.
• Veolia Water Technologies: Veolia operates one of the world's largest water and wastewater treatment footprints, offering chemical dosing, engineering services, and full plant operations to municipal and industrial clients. While focused on plant operations rather than lake remediation, it serves the same ultimate water-quality end-customer.
• Kurita Water Industries: Kurita Water Industries is a major Japanese water treatment company providing specialty chemicals, equipment, and services to industrial and municipal customers globally. It competes in adjacent water treatment chemistry and operates at significantly larger scale than PET.
• BASF Water Solutions: BASF's water treatment chemicals business produces coagulants, flocculants, and phosphorous removal chemistries for municipal and industrial water markets. It competes with Phoslock indirectly through bulk treatment chemicals, especially in large municipal tenders.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/watch?v=4Wkn0vivfqY&t=8s
• LinkedInlinkedin.com/company/phoslock-environmental-technologies

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds2 records

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Phoslock Environmental Technologies