
We ensure compliant quality from pre-treatment through UF/RO to disinfection. Prefabricated skids enable fast and reliable commissioning.
More on Drinking WaterSince 1987, we have been planning, building and maintaining water treatment plants and associated systems. From municipal water supplies and industry to swimming pools and thermal spas, GWT is your full-service provider throughout the DACH region and internationally.
The GWT Group is a leading group of companies specialising in water treatment, complemented by electrical engineering and building services. Since 1987, we have brought together expertise across the entire plant lifecycle: engineering, planning, prefabrication, installation, IC&A/automation, commissioning, maintenance and chemicals—all from a single source. Our in-house prefabrication facility in Austria reduces interfaces, shortens on-site work and measurably improves quality. As a partner with strong regional roots, we deliver projects across Austria, the DACH region and worldwide in a wide range of industries. We are committed to reliable, standards-compliant solutions with clear documentation and predictable operating costs.
Our expertise in water treatment is at the core of what we do, while electrical engineering and building services (HVAC) bring the systems together into a reliable whole. Taking end-to-end responsibility, from process selection to ongoing support, reduces risk, keeps projects on schedule and ensures transparent costs. The result is stable water quality, safe processes and systems that prove their worth in day-to-day operation.
We ensure compliance with standards throughout, from pretreatment through UF/RO and disinfection. Prefabricated skids enable fast, safe commissioning.
We ensure compliance with standards throughout, from pretreatment through UF/RO and disinfection. Prefabricated skids enable fast, safe commissioning.
Mechanical, biological and tertiary treatment stages ensure consistent effluent quality. Our systems are robustly designed and clearly documented.
Mechanical, biological and tertiary treatment stages ensure consistent effluent quality. Our systems are robustly designed and clearly documented.
For predictable OPEX, we offer modular UF/RO/EDI systems, including clear documentation, automation and service.
For predictable OPEX, we offer modular UF/RO/EDI systems, including clear documentation, automation and service.
Reliable pool technology that works behind the scenes delivers safe water quality, efficient systems and dependable operation—from planning through ongoing support.
Reliable pool technology that works behind the scenes delivers safe water quality, efficient systems and dependable operation—from planning through ongoing support.
We provide control cabinet construction, PLCs and remote control systems. Everything is manufactured in-house, tested and documented for easy servicing.
We provide control cabinet construction, PLCs and remote control systems. Everything is manufactured in-house, tested and documented for easy servicing.
We complement heating, air conditioning, ventilation and plumbing with heat recovery and solar hot water. Reliable everyday performance, from swimming pools to sports facilities.
We complement heating, air conditioning, ventilation and plumbing with heat recovery and solar hot water. Reliable everyday performance, from swimming pools to sports facilities.
Physical treatment of wiping solutions using patented ultrafiltration technology. Prefabricated in Austria for fast installation.
Physical treatment of wiping solutions using patented ultrafiltration technology. Prefabricated in Austria for fast installation.
Cut swimming pool energy costs with no upfront investment. Through analysis, implementation and guaranteed savings.
Cut swimming pool energy costs with no upfront investment. Through analysis, implementation and guaranteed savings.
Complete solutions for indoor farming, hydroponics and aquaponics, backed by our expertise in plant engineering.
Complete solutions for indoor farming, hydroponics and aquaponics, backed by our expertise in plant engineering.
Your swimming pool, individually designed and equipped with durable technology and the quality standards used in public swimming pool construction.
Your swimming pool, individually designed and equipped with durable technology and the quality standards used in public swimming pool construction.




































Selected references demonstrate the breadth of our work: municipal and industrial, rooted in the region and delivered internationally.
Since 1987, we have designed, built and maintained water treatment plants and related systems. From municipal water supply to industry, pools and spas, GWT is your one-stop provider across the DACH region and internationally.
GWT Group is a leading corporate group in the field of water treatment technology, complemented by electrical and building services engineering.
Our own prefabrication in Austria reduces interfaces, shortens time on site and measurably increases quality.
As a partner firmly rooted in the region, we deliver projects in Austria, across the DACH region and worldwide. Our commitment: operationally reliable, compliant solutions, clear documentation and predictable costs in daily operation.
Plant engineering for water treatment is our core business. Electrical engineering and building services (HVAC) bring the systems together into a reliable whole. Taking responsibility from process selection through ongoing support reduces risk, keeps projects on schedule and ensures transparent costs.

We ensure compliant quality from pre-treatment through UF/RO to disinfection. Prefabricated skids enable fast and reliable commissioning.
More on Drinking Water
Mechanical, biological and tertiary treatment stages ensure stable effluent values. Our systems are robustly designed and clearly documented.
More on Wastewater
For predictable OPEX we offer modular UF/RO/EDI systems including clean documentation, automation and service.
More on Industry
Reliable pool technology that works behind the scenes: safe water quality, efficient systems and dependable operation from planning through ongoing care.
More on Public Pools
We provide switchgear cabinet construction, PLC and remote control technology. Everything is manufactured in-house, tested and documented for easy service.
More on Electrical Engineering
We complement heating, air conditioning, ventilation and sanitary technology with heat recovery and solar hot water. Reliable in daily use, from pools to sports facilities.
More on Building Services
Physical wiping solution recovery via patented ultrafiltration. Prefabricated in Austria for short assembly times.
More on Wiping Solution
Empty barns become a viable second source of income: recirculating aquaculture systems for fish (standard: 14 t per year), independent of season and weather. Optionally with hydroponics.
More on Farmtec
Reduce pool energy costs with no upfront investment, through analysis, implementation and guaranteed savings.
More on Energy Saving Contracting
Your pool individually planned, equipped with the durable technology and quality standards from public pool construction.
More on Private Pools



































Selected references showcase the breadth of our work: We deliver projects locally and internationally, for municipalities, industry and private clients alike.
Company
GWT Water and Thermal Engineering
GWT Swimming Pools and Spas
GWT Swiss
GWT Aquatech
GWT Vertical Farm Tec
GWT Holding GmbH
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