Welcome to ARCH – the Association of Registered Colon Hydrotherapists
ARCH is the UK's leading community for Colon Hydrotherapists. Together we set standards, support our members and spread the word about this effective, natural treatment that we provide for thousands of people, from all walks of life, every week.
ARCH members are passionate about our therapy, because we see on a daily basis the real, positive effects it has on people's lives, whether they're suffering with digestive problems or simply looking for a natural boost to their health and wellbeing.
We're here to help you, whether you want to find a Colon Hydrotherapist, learn how to become a Colon Hydrotherapist or just find out more about how ARCH works as a community to inform the public and support our members.
What is colon hydrotherapy?
The therapeutic internal use of water to promote correct bowel function.
About the Association
Founded in 1987, ARCH is the UK’s leading Colon Hydrotherapy organisation

Latest from ARCH Social Media
ARCH Colonics Hydrotherapy Blog
Health tips and updates from ARCH Colonic's Association
ARCH – working for you for 30 years
31 May 2017 : It’s thirty years since a dozen dedicated therapists first got together to form the Colonic International Association, which went on to become ARCH – the Association of Registered Colon Hydrotherapists – in 2001. Today, ARCH has grown into the UK’s…
Michael Mosley on the micro biome
23 May 2017 : Recently, ardent healthy eating enthusiast, Michael Moseley, has moved on from his famous five-two fast diet to focus his energy on something ARCH colon hydrotherapists have known for a long time – that a healthy gut microbiome leads to a…
Fecal Microbiota Transplant
14 May 2017 : The main theme of this year’s 30th Anniversary ARCH Conference is the gut microbiome, with our keynote speaker, Dr Mark Davis, lecturing on fecal microbiota transplantation or FMT. But what exactly is FMT, what conditions can it be used to…