Ask most pool operators what records they're legally required to keep, and you'll get a vague answer — "the logbook" or "the COSHH stuff." Very few can list the actual requirements with confidence.
That's a problem. Because when an HSE inspector, local authority environmental health officer, or insurance assessor walks through your door, those records are the first thing they ask for. And "we keep them somewhere" is not an acceptable answer.
Here's a practical breakdown of the five record categories every UK pool operator must maintain, what each one must include, and how long you need to keep it.
⚠️ Legal context: The obligation to keep pool records is derived from the Health and Safety at Work Act 1974, the Management of Health and Safety at Work Regulations 1999, and sector-specific guidance in HSG179 and the PWTAG Code of Practice. Failure to maintain adequate records can constitute a breach of these duties.
🧪 Water Quality Test Results
This is the big one. PWTAG's Code of Practice requires that all water tests are recorded, with enough detail to prove that parameters were checked at the required frequency and that action was taken when readings fell outside acceptable ranges.
What each record must include
- Date and time of the test
- pH reading
- Free chlorine (or alternative sanitiser) reading
- Combined chlorine reading (where applicable)
- Water temperature
- Name of the person who carried out the test
- Any corrective action taken
The testing frequency varies by facility type, but for public swimming pools the minimum is every two hours during opening. For spas, it's more frequent — typically every hour.
🔧 Filter Backwash & Maintenance Logs
Your filtration system is the primary defence against waterborne pathogens. PWTAG requires that every backwash event is recorded, and that filter runs are monitored. Inspectors specifically look for this as evidence that the filtration system is being actively managed.
What each record must include
- Date and time of the backwash
- Filter number or identifier
- Trigger reason (pressure differential, scheduled, water quality issue, etc.)
- Pressure readings before and after
- Duration of backwash and rinse cycles
- Water clarity after backwash
- Operator name
Also included in this category: records of annual filter media inspections (PWTAG CoP 6.5), which many facilities overlook entirely.
⚗️ COSHH Assessments for Pool Chemicals
Every chemical used in your plant room — chlorine granules, pH reducer, algaecide, descaler — must have a written COSHH assessment. The Control of Substances Hazardous to Health Regulations 2002 requires employers to assess the risk from each chemical and put controls in place.
What each assessment must include
- The substance and its properties
- Who is exposed and how
- Risk assessment (likelihood and severity)
- Control measures (ventilation, handling procedures)
- PPE required
- Emergency and first aid procedures
- Review date
COSHH assessments must be specific to your actual working conditions. Generic manufacturer datasheets (SDS sheets) do not satisfy this requirement on their own.
Get All 5 Records Right
PoolComply handles every record category digitally — water tests, backwash logs, COSHH assessments, training records, and PTOPs. Alpha access is free for 12 months.
Start Your Free Trial →📋 Staff Training & Competency Records
HSG179 places a clear duty on pool operators to ensure that all staff working with pool plant equipment are competent to do so. This means holding records of relevant qualifications and training for every person who handles chemicals, operates plant equipment, or is responsible for water quality.
What to keep for each staff member
- Pool Plant Operator (PPO) or Pool Operator qualification certificate
- First Aid certificate (where required by role)
- Date of qualification and expiry/renewal date
- Evidence of any refresher training
- Induction records for new staff
An inspector finding that operators without documented competency certificates have been managing pool plant can lead to immediate enforcement action. "We know they're qualified" simply isn't enough.
📄 Risk Assessment & PTOP (Pool Technical Operating Procedures)
This is the overarching document that pulls everything together. HSG179 requires every public pool to have a Pool Technical Operating Procedures document — often called a PTOP or Pool Water Treatment Operating Manual. This is your facility-specific manual covering how the pool plant is operated, maintained, and what to do when things go wrong.
What a PTOP must cover
- Pool design and technical specifications
- Water treatment system description
- Target water quality parameters and action levels
- Testing procedures and frequency
- Chemical handling and dosing procedures
- Emergency procedures (contamination, equipment failure)
- Routine maintenance schedules
- Roles and responsibilities
The PTOP is the single most important compliance document you can have. An inspector who sees a well-maintained, facility-specific PTOP is immediately satisfied that the facility is being professionally managed.
How Long Must Records Be Kept?
The general principle under UK health and safety law is that records should be kept for a minimum of five years. However, there are some practical considerations:
- Water test records — minimum 5 years, but longer retention is advisable given the potential for delayed legal action following a waterborne illness incident
- COSHH assessments — keep the current version plus any previous versions for 5 years
- Training records — keep for the duration of employment plus 5 years after leaving
- Incident-related records — if any record relates to an incident involving injury or illness, keep indefinitely
Practical note: Paper records kept in a folder are fragile. They get wet, go missing, are incomplete, and are difficult to search. If your records don't survive an inspection in good order, it calls into question whether they were ever kept properly. Digital records solve this entirely.
How PoolComply Handles All Five
PoolComply was built specifically around these five record categories. Every test logged creates an attributable, timestamped water quality record. Every backwash event is structured and searchable. The Document Library holds your COSHH assessments, staff certificates, and PTOP with review date tracking.
The Compliance Centre evaluates your records against all five categories in real time — so you always know where you stand, not just when an inspector asks.
If you're currently managing compliance with paper logbooks and ring-binders, the risk isn't just an inconvenient inspection. It's the possibility that when something goes wrong — a waterborne illness, a chemical incident, a staff injury — you won't have the records to defend yourself.