Finding safer ways to
manage and enjoy water
About the 4D model
This model focuses on the risk factors involved in preventing drowning in a swimming pool environment. It is aimed to help risk assessors develop a better risk assessment specific to the drowning risk faced by pool users of swimming pools. There are essentially four that determine the outcome of a drowning incident in a commercial swimming pool environment:
- Deficient identification - failure to promptly see a person in the water.
- Deficient recognition - failure to promptly recognise the person you can see in the water is in danger.
- Deficient intervention - failure to promptly rescue and recover the person to the poolside.
- Deficient pre-hospital care - failure to promptly administer basic life support and first aid.
There are 15 ways steps in the drowning process which may result in a fatal drowning outcome.
- Lone swimming.
- No visibility of the person in danger.
- The supervisor is distracted.
- The supervisor applies poor surveillance.
- Visibility is of poor quality.
- Supervisor or pool users have insufficient knowledge to recognise the person is in danger.
- Recognition is delayed owing to distraction, distance from the person in danger, or similar factors.
- Rescue or recovery to poolside is delayed.
- Rescue or recovery is obstructed by another pool user or event.
- Rescue or recovery causes additional harm to the person in danger.
- The rescuer is unable to rescue or recover the casualty to the poolside.
- Emergency call is delayed or deficient in communicating key safety messages.
- CPR is delayed or deficient in sustaining life.
- Application of the defibrillator is delayed or deficient in restoring normal cardiac rhythm.
- Aftercare provided by emergency services is delayed or deficient.
Deficient identification
Deficient recognition
Deficient intervention
Deficient pre-hospital care
Example adaption of the model for your drowning risk assessment
This is not a complete risk assessment. It is designed to demonstrate how the structure of the model might be used to improve your drowning risk assessment approach.
Most operators will already have an existing approach to the assessment of drowning risk presented by their pools. In some cases, a single line of a risk assessment is dedicated to preventing drowning. Pools are highly controlled environments but drowning ranks as one of the most likely risks to result in significant injury or a fatal outcome in and around the poolside.
The care and maturity of the drowning risk assessment you complete should directly correlate to the commercial opportunity your pool provides. If you make a living or build a business by inviting non-swimmers, weak swimmers, and those with serious health conditions (amongst others) into your swimming pool, then the care and investment made in developing controls to ensure your pool are safe, should be undertaken with the respect and depth that it warrants. The object should not simply be to comply with the law, but to ensure your pool provides a consistently safe foundation on which to build your business.
Hazards
Identify the hazards and the likely harm categories. The risk factors 1-15 could be used as a potential structure. The example covered is Risk Factor 1. No Supervision.
Who may be harmed?
Identify those at particular risk from the hazard.
Risk mitigation
You could use this space to include the controls which are specific in preventing
No Supervision
Where a pool user is unsupervised when they are in distress, it may delay detection. Reasons pools may be unsupervised may include:
- No constant poolside supervision provided
- CCTV cameras not observed
- Lone swimmer
- Poolside supervisor has left poolside unattended
- Users have gained unauthorized access to poolside
An unsupervised pool presents the risk that a person may drown.
Those who may be harmed
Employees, contractors and members of the public may be at risk of injury if they fall into the pool.
Small children who are non or weak swimmers are likely to be at the greatest risk from an unsupervised pool.
Controls put in place to reduce the risk presented by an unsupervised pool
Gate alarms have been fitted to alert employees and others to those entering the poolside when it is closed.
Gates on the changing room exits have been installed to prevent access to poolside by customers when not in use.
Contractors are instructed at the reception when signing in that work on poolside must be authorised and supervised by the duty manager.
At any time when the gates to poolside are unlocked, a lifeguard must provide constant poolside supervision.
The pool operates a no-lone swimmer policy across all sessions.
Employees responsible for locking and unlocking the pool shall complete an initial induction and undertake periodic ongoing training which covers the specific responsibilities for controlling pool access.
Citation: Jacklin, D. 2021. How do people drown in swimming pools (Water Incident Research Hub, 28 December).