ISO/IEC 27001:2022 Annex A · Control 7.5

Protecting Against Physical and Environmental Threats: A Practical Implementation Guide

Protect people, information and equipment from fire, water, temperature, power and location-specific hazards.

This control concerns designing and implementing protection against physical and environmental threats.

Practical interpretation: Generic fire safety is not the whole control. Relevant threats depend on geography, building, utilities, neighboring activities, asset sensitivity and recovery needs.

What should the control achieve?

Site-specific threats are assessed.
Preventive, detective and response measures are layered.
Environmental conditions are monitored.
Exercises and maintenance demonstrate readiness.

Step-by-step implementation

Identify hazards

Consider fire, flood, leak, heat, humidity, earthquake, storm, pollution, civil disturbance and nearby hazards.

Assess exposure and impact

Map critical rooms, floor level, utilities, drainage, construction and single points of failure.

Reduce likelihood

Use suitable location, fire separation, leak prevention, maintenance and safe storage.

Detect early

Deploy smoke, heat, water, temperature and humidity monitoring with alerts.

Prepare response

Coordinate evacuation, shutdown, salvage, emergency services and continuity.

Test and maintain

Inspect sensors, extinguishing systems, drainage and response plans.

What this could look like in practice

A basement comms room is found vulnerable to water ingress. Equipment is raised, leak sensors alert Facilities, shutoff valves are labeled and a migration plan moves the most critical service to a safer room.

Activity	Practical implementation	Evidence
Fire	Detection and suitable suppression protect the equipment area.	Inspection and test
Water	Sensors, raised racks and drainage reduce damage.	Alarm test
Temperature	Redundant cooling and threshold alerts are monitored.	Environmental log
Storm	Continuity plan addresses site inaccessibility and power loss.	Exercise record

Implementation evidence

Environmental risk assessment
Hazard maps
Sensor configuration
Maintenance records
Alarm tests
Emergency procedures
Exercise results
Corrective actions

Useful metrics

Environmental alarms tested
Threshold excursions
Protective maintenance overdue
High-risk findings unresolved

Common mistakes

Using a generic hazard list without site inspection.
Placing critical equipment below water pipes.
Sending alerts to unattended mailboxes.
Installing suppression unsuitable for equipment.
Failing to include climate and neighborhood changes.

Questions an auditor may ask

Which hazards are most relevant here?
How are conditions monitored?
Show maintenance and alarm tests.
What happens after hours?

Implementation test: Simulate a leak or temperature alarm and trace detection, notification, safe response and continuity actions.

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This independent educational guide paraphrases the practical intent of the control and does not replace the official ISO standards, professional advice or an organization-specific risk assessment. It is not affiliated with or endorsed by ISO.

ISO 27001 Annex A 7.5: Protecting Against Physical and Environmental Threats – Practical Implementation Guide