Overview - ISO 21426:2018 (Medical spas - Service requirements)
ISO 21426:2018 defines service requirements for medical spas that use natural healing waters (excluding sea water) and other natural resources. It sets out framework requirements to ensure quality, safety and consistency in the operation of medical spas (balneology centres) without prescribing medical decisions - those remain the responsibility of qualified healthcare professionals. The standard targets establishments offering therapeutic treatments based on mineral/thermal waters, natural gases and peloids (therapeutic muds).
Key topics and technical requirements
ISO 21426 covers practical, operational and technical areas needed to run a compliant medical spa:
- Facilities and equipment
- Reception, dressing rooms, medical rooms, care areas (dry and wet), wastewater treatment and plant rooms.
- Staffing and competencies
- General staffing requirements, care-area professionals, and technical personnel.
- Natural resources management
- Characterization, balneological assessment and monitoring of natural healing waters, natural gases, and peloids; guidance on physicochemical and microbiological testing and control analyses (see annexes for test and reporting guidance).
- Maintenance, hygiene and cleaning
- Preventive and corrective maintenance, emergency/evacuation planning, hot water systems, calibration/verification of measurement equipment, and microbiological control programmes.
- Service provision
- Customer-facing processes: booking, check-in/out, communication, medical examination protocols, treatment manuals and other patient-care procedures.
- Support processes
- Marketing, procurement and storage, environmental policy, and customer satisfaction monitoring.
- Documentation and monitoring
- Analytic control programmes, cleaning/disinfection plans and reporting for resource control and continual improvement.
Practical applications - who uses this standard
ISO 21426 is practical for organizations and professionals involved in health tourism and medical spa operations:
- Medical spa operators and managers - to design, operate and document service quality and safety.
- Facility designers and consultants - to specify plant rooms, wastewater systems and treatment areas for therapeutic water use.
- Health tourism authorities and destination managers - to set minimum quality standards and promote compliant services.
- Regulators and accreditation bodies - for inspection criteria and licensing of medical spa services.
- Laboratories and technical staff - for sampling, physicochemical and microbiological testing and monitoring.
- Marketing and customer-relations teams - to align services with documented quality processes and customer expectations.
Related standards and references
- ISO 17680 - thalassotherapy centres (different water type)
- ISO 17679 - wellness spa centres (distinct scope)
- ISO 7001 - graphical public information symbols (normative reference)
- Annexes A–D of ISO 21426 provide guidelines for water/gas/peloid characterization, testing and monitoring.
ISO 21426:2018 is an essential reference for ensuring safe, quality-driven medical spa services that rely on natural resources, helping operators meet regulatory expectations and customer trust in health tourism.
