Water safety plans and monitoring
The risk assessment says what the risks are. The water safety plan is what your team does about them every day, every week and every season, written so that the night engineer, the auditor and the investigator all read the same thing.
What the plan contains
- Control limits
- Temperature, free chlorine and pH targets for each system, with the action to take when a reading is out of range.
- Check schedule
- Daily tank chlorine, weekly flushing of unoccupied rooms, monthly inspections, quarterly showerhead cleaning, monthly cooling-tower cleaning, sampling dates. Who does each one.
- Logbooks and check sheets
- Paper or spreadsheet, in Thai and English, designed to be filled in at the tank rather than at a desk later.
- Responsible person
- A named person and a deputy, trained by us in a half-day session, with the authority to stop and fix.
- Closure and reopening
- What to do when a wing, floor, spa or tower comes out of use for the low season, and the flushing, disinfection and checks before guests return.
- Incident procedure
- What happens after a positive sample or a notification: who is called, what is isolated, how it is recorded. See what to do now.
- Review
- When the plan is re-read and the assessment repeated: after changes, after incidents, and at least every two years.
Monitoring with us
Review visits keep the scheme in use after the assessment. Hotels in a 2025 Banglamung study said they wanted officials to act as mentors with quarterly follow-ups; we do that job for the property.
- Quarterly or six-monthly visits: readings checked against the logbook, outlets spot-tested, towers inspected
- Independent sampling at TEST TECH (ISO 11731:2017), IMC Thai (AS 3896:2017) or a Department of Medical Sciences Regional Medical Sciences Center (CDC-based method)
- Logbook review and a short written note after each visit, the record auditors ask for
- Re-assessment after refurbishment, change of use or an incident
- Preparation before a tour-operator or brand audit
A typical monitoring routine
| Check | Where | How often | Limit |
|---|---|---|---|
| Free chlorine | Storage tanks | Daily | At least 0.2 mg/L |
| Free chlorine | Sentinel taps, furthest rooms | Weekly | 0.2 to 0.5 mg/L |
| Hot water temperature | Store outlet and return | Weekly | 60 °C stored, 50 °C return |
| Flushing | Unoccupied rooms and dead legs | Weekly | Two to three minutes per outlet |
| Showerheads | All rooms | Quarterly | Cleaned and descaled |
| Cooling tower | Each cell | Weekly visual check; cleaned monthly; full clean and disinfection at least twice a year | Free chlorine at least 1 mg/L in the basin where chlorine is used |
| Legionella sampling | Points named in the plan | Quarterly towers; six-monthly domestic water | Under 1,000 cfu/L |
Sources:Bureau of Environmental Health guideline;Niakul 2025;HSE HSG274;TUI 15-point plan.
Get a quote for your property
Tell us the property type, where it is, how many rooms and whether it has cooling towers. We reply with a price and the earliest survey date, usually the same working day.
Had a positive result, or a notification about a guest?
What you do and record in the first 24 hours is what investigators and tour operators will read later. Get in touch now for advice on disinfection, independent resampling and the evidence they will ask for.