Water

What Water does

Water ApS is a Danish private limited company (ApS) headquartered in Farum, Denmark, founded over 35 years ago and operating as a subsidiary of OxyGuard International A/S. The company designs and manufactures ozone-based water treatment systems under the Gaia brand, serving B2B customers primarily in recirculating aquaculture systems (RAS), land-based salmon and trout farms, municipal wastewater treatment, drinking water utilities, swimming pools, industrial water treatment, and public aquariums and zoological attractions.

Its core technology is the Gaia ozone generator—a patented, modular system manufactured in Denmark that produces high-concentration ozone (up to 10% wt/wt, 125 g/h per double-cell) with energy consumption reportedly reduced by 30%+ versus alternatives. The product line includes Gaia Modular, Gaia Cabinet (offered in five capacity configurations), the Ozone Sensor, Control Unit, Contra Valve, Chiller, and Oxygen Generator. Gaia systems integrate with OxyGuard Pacific monitoring hardware and Cobália digital farm management software, with supporting components sourced from SMC (valves, chillers) and OXYMAT (PSA oxygen generators up to 95% purity). The systems are designed for modular placement close to treatment points and are supported by ongoing DTU-led research collaborations (BIZON, RASALT, ProBiOzon, VIDA).

The business model is enterprise B2B hardware sales on a quote basis, supplemented by professional services and consulting, with distribution handled through direct sales and a network of distributors that includes US coverage via Carsten Wittrup. The company is small, with a stated team of approximately 6 people led by CEO Richard Martin, a PhD environmental engineer. No revenue, funding history, or financial disclosures are publicly available.

Name

Water

Legal name

Water ApS

Website

https://water.dk

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

1–10 employees

Short description

Water ApS is a Danish subsidiary of OxyGuard International that designs and manufactures patented Gaia ozone-based water treatment systems for B2B customers in aquaculture, municipal wastewater, drinking water, swimming pools, and public aquariums.

Ownership category

akta.pro rank

Headquarters

HQ city

Farum

HQ country

Denmark

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Ozone Generator Hardware Sales: Water ApS sells Gaia ozone generators as physical products, ranging from compact modular units (62.5 g/h) to larger cabinet configurations (up to 500 g/h). The Gaia Cabinet is offered in five configurations: 62.5, 125, 250, 375, and 500 g/h capacities. Critical components are supplied by SMC (valves, flow systems) and OxyGuard A/S (control systems).
2. Monitoring and Control Equipment: Sale of supporting equipment including Ozone Sensors (G20), Gaia Control Units, Contra Valves, Chillers (HRS), and Oxygen Generators. The oxygen generator is based on PSA (Pressure Swing Adsorption) technology from OXYMAT, delivering purities up to 95%.
3. Professional Services and Expertise: Water ApS provides tailored ozone solutions from design to operation, including consultation, system design, implementation support, and operational expertise. They support customers throughout the entire process for reliable and efficient ozone solutions.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

Water ApS designs, manufactures, and supplies ozone-based water treatment systems under its Gaia product line, including ozone generators, control units, sensors, and supporting hardware. The company serves commercial and municipal water treatment applications, with particular focus on aquaculture, swimming pools, drinking water, wastewater, industrial process water, and aquarium systems. It also offers ozone-related consulting, installation, and service support as part of its offering.

Product overview

Water ApS offers the Gaia ozone generator family as a unified modular water treatment platform designed for ozone-based oxidation in aquaculture, swimming pools, drinking water, wastewater, industrial water, and attractions applications. The core Gaia Modular ozone generator (patented, made in Denmark) is available in configurable single and double-cell units producing up to 125 g/h ozone, while the Gaia Cabinet provides pre-configured solutions with capacities from 62.5 to 500 g/h. These are complemented by the Gaia Control Unit for monitoring and automation, the OxyGuard-developed Ozone Sensor for real-time measurement, and supporting equipment including Contra Valves, Chiller-HRS units, and Oxygen Generators. The products integrate with OxyGuard's Pacific monitoring system and Cobália digital platform for data management and remote operation.

Differentiator

Problem solved

Functional benefit

Brands

• Gaia: Gaia is Water ApS's flagship product line featuring modular ozone generators including Gaia Modular, Gaia Cabinet, and Gaia Control Unit for water treatment applications in aquaculture, swimming pools, industrial water, wastewater, and drinking water.

Products and services

• Gaia Modular
• Gaia Cabinet
• Gaia Control Unit
• Ozone Sensor
• Contra Valve
• Chiller-HRS
• Oxygen Generator
• Ozone Expertise (Consulting & Service)

Quantifiable outcome

• Over 90% bacteria reduction in aquaculture production water
• +5 more outcomes

Named customers7 records

Segments6 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature6 records

Partnerships

Eleven partnerships are on record, tiered core, key and supporting.

• OxyGuard International A/ScoreTechnology or IntegrationWater ApS is part of the OxyGuard International A/S group. OxyGuard develops monitoring and control solutions (Pacific system, Ozone Sensor G20, Cobália platform) that integrate with Gaia ozone generators. Water ApS uses OxyGuard control systems as standard equipment in all Gaia installations. The partnership provides real-time monitoring, automated dosing control, and digital farm management capabilities.
• SMCcoreTechnology or IntegrationSMC is a global leader supplying critical components for ozone systems including valves, flow meters, safety valves for oxygen and ozone, oxygen pressure regulators, check valves, quick couplings, hose fittings, and chillers (HRS units). Components supplied by SMC include ozone-resistant seals for maximum durability.
• OXYMATkeyTechnology or IntegrationOXYMAT supplies PSA (Pressure Swing Adsorption) oxygen generators that enable on-site production of high-purity oxygen (up to 95%) using only electricity and compressed air. This supports Gaia systems by providing stable oxygen supply essential for efficient ozone generation.
• DTU-Sustain (Technical University of Denmark)coreStrategic or Co-development PartnerCollaborative research partner in BIZON project with Associate Professor Henrik Rasmus Andersen and Senior Researcher Adam Christopher Hambly. DTU provides scientific evaluation, water sample analysis for TOC, dissolved organic matter (FDOM), bacterial content (BactiQuant), and geosmin concentration. Also partner in RASALT, ProBiOzon, and wastewater treatment research.
• DanForelcoreStrategic or Co-development PartnerPond farming facility owner in Nørre Vium hosting the BIZON project. Four raceways equipped with ozone generators and approximately 60 sensors monitoring pH, oxygen levels, ozone concentration, and turbidity. Produces 700 tons of trout annually. Project validates ozone efficacy in purifying water within existing freshwater systems.
• Danish Fisheries Agency / EMFAF (European Maritime, Fisheries and Aquaculture Fund)keyStrategic or Co-development PartnerThe BIZON project is supported by the Danish Fisheries Agency and the European Union through EMFAF funding, demonstrating government/institutional support for ozone technology validation in aquaculture.
• Skagen SalmonkeyStrategic or Co-development PartnerWater ApS delivered a large ozone system for operational experience in development of efficient and safe ozone solutions. The collaboration helped strengthen and document Gaia technology development, providing insights into testing and optimizations for stable and efficient production in RAS facilities.
• AquacirclesupportingStrategic or Co-development PartnerCollaborative partner in ProBiOzon project (Protein skimming, biofiltration, ozonation) alongside DTU, Dansk Akvakur, and Nr Vium Dambrug. Project demonstrates disinfective properties of ozonation water treatment.
• Danish Technical University (DTU) / DTU AquacoreStrategic or Co-development PartnerResearch partner in multiple projects including ProBiOzon, RASALT, and BIZON. DTU Aqua analyzed water and fish samples for pathogens. Collaboration addresses ozone kinetics, required dosage prediction, and effects on fish health and mortality in freshwater RAS.
• Danish Environmental Protection AgencysupportingStrategic or Co-development PartnerWater ApS participates in projects under the Danish EPA and collaborates on treatment train evaluations for advanced treatment technologies for micropollutant removal, as documented in the Treatment Train national study.
• European Ozone Association (EuOTA)supportingStrategic or Co-development PartnerWater ApS is a member of the European Ozone Association, demonstrating commitment to ozone technology standards and industry collaboration.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Absolute Ozone: Absolute Ozone is a manufacturer of ozone generators for industrial, laboratory, and aquaculture applications. It is a comparable specialist in the modular ozone generator market with overlapping customer segments in fish farming and water treatment.
• DEL Ozone: DEL Ozone is a US-based ozone technology manufacturer serving commercial pools, aquaculture, and industrial water applications. It is a direct niche competitor to Water ApS with similar product positioning in aquaculture and pool ozone systems.
• Prominent (ProMinent): ProMinent is a specialist manufacturer of ozone systems, metering technology, and water treatment solutions for industrial and municipal applications. It directly competes with Water ApS in mid-scale ozone generation and is a comparable specialist with similar focus on industrial process water and aquaculture.

Broad incumbents

• Xylem (Wedeco): Xylem's Wedeco brand is a global leader in ozone and UV water treatment systems for municipal and industrial applications. It is a direct competitor in the ozone generator market but operates at a vastly larger scale with bundled UV/ozone/filtration solutions and global service networks.
• Veolia Water Technologies: Veolia is a global water and wastewater treatment giant offering ozone and advanced oxidation processes as part of full EPC plant deliveries. It competes with Water ApS in municipal wastewater retrofits driven by EU directive compliance, but at a much larger scale with bundled service offerings.
• Trojan Technologies: Trojan Technologies (now part of Veralto) is a major provider of UV water treatment systems, increasingly expanding into ozone solutions. It is comparable in addressing similar aquaculture, municipal, and industrial water treatment markets, though Trojan's primary differentiator remains UV-based rather than ozone.
• BWT - Best Water Technology: BWT is a European water treatment specialist offering point-of-entry, pool, and industrial water solutions including ozone and UV systems. It competes indirectly with Water ApS in pool and light-industrial ozone applications, with a broader consumer-facing portfolio.
• Suez Ozonia: Ozonia (part of Suez) is a major manufacturer of ozone generation systems for drinking water, wastewater, and industrial process water. It directly competes with Water ApS in ozone generator technology but benefits from Suez's broader water utility infrastructure and EPC capabilities.
• Mitsubishi Electric Ozone Generators: Mitsubishi Electric produces high-capacity ozone generators for water and wastewater treatment under its Meidensha and Power Systems business. It competes with Water ApS at the larger end of industrial ozone systems, particularly for municipal water utilities.

Regional players

• Ozone Tech Systems: Ozone Tech Systems is a Swedish-based ozone system provider serving municipalities and industry across the Nordics. It is a comparable regional specialist competing with Water ApS in Scandinavian aquaculture and water utility markets.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@WaterApS
• LinkedInlinkedin.com/company/water-aps

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds

Investors

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 Water