Legionella Logger
Monthly water temperature checks to HSG274, logged and evidenced
What it does
If you let a property or look after a building, you are expected to keep hot water hot, cold water cold, water moving, and a record that says so. HSE guidance HSG274 Part 2 describes the routine: monthly temperature checks at the cylinder and the sentinel taps, weekly flushing of outlets nobody uses. Legionella Logger sets that routine up from a few plain questions, reminds you when it is due, walks you round the property on check day with the targets and timers in front of you, and hands over a PDF log when an assessor, a tenant, an insurer or an inspector asks for one.
Features
- Guided setup — stored cylinder or combi, loft tank or mains, nearest and furthest taps, rarely used outlets: the app proposes the monitoring points HSG274 asks for, and you can rename, add or retire any of them
- Check day — points in walking order with their target shown, built-in run timers (one minute hot, two minutes cold), instant pass or fail as you type, and a follow-up note whenever a reading misses
- Weekly flushing — one tap per outlet, logged with who did it
- Reminders that stay quiet — one local reminder per property for the monthly checks and one for the weekly flush; nothing nags beyond your schedule, and the app says plainly if reminders are off
- PDF monitoring log — any period, formatted for the file: who recorded each reading, the target, met or not met, actions taken, every flush
- Records that stay — the app never deletes a reading on its own; ACoP L8 expects monitoring records to be kept for at least five years
- Free for one property — every feature, watermarked PDF; a single one-time unlock adds unlimited properties and clean PDFs. No subscription
- Private by design — no account, no ads, no tracking, no servers; everything stays on your phone
Legionella Logger is a logbook, not a risk assessment. It does not carry out or replace a legionella risk assessment, which the law requires from a competent person, and it does not certify a water system. Your assessment sets the regime; the app records what you did. Targets and default frequencies are taken from HSG274 Part 2 (second edition, 2024). Contains public sector information licensed under the Open Government Licence v3.0. Not affiliated with or endorsed by HSE.
Guides
- Can a landlord do their own legionella risk assessment?
For most rented homes, yes. HSE says most landlords can assess the risk themselves without professional training. Here is what to look at, what to write down, what a simple system needs, and when to get help. - Sentinel outlets explained
What a sentinel outlet is, how to pick the right taps in a house or a block, why a circulating system's hot sentinels are different, and what the rotation of other outlets is for. - Do I need a legionella certificate?
No. Health and safety law does not require a landlord to obtain or produce a legionella test certificate. Here is what the law does ask for, why water sampling is rarely needed, and what to say to a company selling you one. - Landlord legionella duties: what the checks actually mean
What a landlord is actually required to do about legionella: assess the risk, control it, keep records. What monthly monitoring involves when it applies, and why most simple domestic systems need far less than that. - What temperature should hot water be?
The L8 and HSG274 temperature thresholds in plain English: 60 °C leaving the cylinder, 50 °C at the tap within one minute, below 20 °C on the cold within two minutes, and what counts as a pass at the boundary.