Aqua21 is a brand that specializes in water treatment systems. Their technology is scalable, meaning they offer solutions for a wide range of users, including individuals, households, businesses, and communities. However, they are initially focusing on specific markets that they believe will have the greatest positive impact on the environment, economy, and users.

Their target markets include medium-scale industrial applications, such as abstraction, process effluent, and grey water treatment, as well as community water supplies. For these applications, Aqua21 offers a suitcase-sized unit. They also cater to mini-scale mobile applications, such as disaster relief, military use, and smaller community water supplies, with a briefcase-sized unit.

Additionally, they have micro-scale point-of-use applications for taps and showerheads in homes, leisure centers, schools, and hospitals, with a unit the size of a mobile phone. Aqua21 also provides combined-scale systems for remote, isolated, or rural community water treatment. These systems can partially replace traditional water supply infrastructure and operations.

With their commitment to scalable technology and diverse offerings, Aqua21 aims to provide efficient and effective water treatment solutions that benefit both the environment and users