Chemical Free Swimming Pools

PURA Water Tech (PWT) is a Bio Solutions Company developing sustainable technologies and products. Our main goal is to provide safe, chemical free swimming pools. 

Our experience and expertise is in designing and building natural swimming pools, either working with your own contractors, or managing and executing the whole natural swimming pool process for you.





PURA Technology
PWT’s bio-filtration technology relies on bacterial action and an absorption filter to control any build-up of organic nutrients that leads to the growth of algae and pathogens. By controlling these nutrients, the technology delivers clear water without the use of any chemicals or other forms of water sterilisation. This technology has been developed and monitoring by our engineering team for the last 3 years in order to ensure safe naturalised pools.

Advantages of the PWT Technology
The main advantages compared with the conventional chemical pools are:

  • Health benefits as prevents allergies
  • Benefits to the environment
  • Low carbon footprint
  • Low energy consumption
  • More versatility
  • Modular system
  • Pool available all year


Technology Validation
The PWT technology fulfils all the international guidelines for biological outdoor water treatments for swimming pools. Our partners are OPEN, CENTIMFE and PL-CETEMARES in Portugal and the I&D Centre that carried out the validation studies of the chemicals and microbiological water results.


Installation System
The design and type of swimming pool is discussed with our landscape architect and the biological treatment system is installed according to specifications. This system is very versatile due to the fact that it is modular, so it allows for the conversion of conventional chemical pools to naturalised pools.


Our show-room is available all year.
For more information’s +351 966 304 186  or



Website: Chemical Free Swimming Pools


Facebook: Chemical Free Swimming Pools

Phone: 00 351 966 304 186

Address: Rua Aníbal H. Abrantes, n.º 7, 2430-069 Marinha Grande, Portugal