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Digital Legionella Logbook

The logbook.
Always up to date.
Ready to export.

The Legionella logbook is where an inspection begins, and where paper regimes fall down. AQUAIOT keeps the logbook current automatically, so when an inspector, insurer, or auditor asks, the complete record is one export away.

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Live monitoring. Continuous compliance.
AQUAIOT L8 Dashboard
42Outlets OK
3Caution
1Alert
Sentinel Outlets – Live
Tank A – Cold Feed18.4°COK
Outlet 7 – HWS Return49.1°CCaution
Outlet 12 – Sentinel56.8°CAlert
CW Tank B17.2°COK
Man-in-a-van visits leave gapsInspection sheets capture one moment. Between rounds, temperatures drift unseen, and your compliance record has no answer for it.
Legionella thrives between 20C and 45CRisk conditions develop and resolve between visits. Manual schedules cannot catch what happens overnight.
Audit prep should not take daysWhen an inspector asks for records, paper logbooks take days to compile. A digital audit trail is instant.
Every missed flush is a duty-of-care gapOne undocumented flushing event is a defensible record waiting to fail under legal scrutiny.
The AQUAIOT Solution

Always current.
Never backfilled.
Exported in minutes.

The logbook is the artefact your regime is judged on, yet paper versions run behind with late entries and gaps. AQUAIOT keeps a digital logbook that writes itself from the sensors, so it is always current and always defensible.

Written by the sensors, every temperature reading enters the digital logbook automatically, so it stays current without anyone transcribing a round.
Complete and in order, no missing weekends, no late entries, no illegible scrawl, just a continuous timestamped record of every monitored point.
Audit-ready export, produce the logbook for any asset or period the moment an inspector, insurer, or auditor asks, in minutes rather than days.
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Live Outlet Status
CW Tank – Return Temp16.8°C
HWS Flow – Calorifier60.4°C
HWS Return – Loop 349.3°C
Sentinel Outlet 1256.8°C
Alert triggered – Outlet 12
Temperature above L8 calorifier threshold. Notification sent 14:32.
How It Works

Three steps to continuous L8 compliance

Step 01

Monitor

AQUAIOT sensors are deployed at tanks, loops, calorifiers, and sentinel outlets. Temperature is profiled continuously, every reading timestamped and logged to the cloud over secure cellular or LoRaWAN telemetry.

Step 02

Alert

When temperatures drift outside HSE L8 thresholds, or when a scheduled flush is missed, AQUAIOT triggers an immediate alert via SMS, email, or app, with role-based escalation rules for your estates team.

Step 03

Record

Every reading, alert, and action is captured in tamper-evident audit logs. Records are exportable on demand and integrate with CAFM, BMS, and AIMS systems, so audit preparation is minutes, not days.

Capabilities

Everything your L8 programme needs

Purpose-built for estates, facilities, and compliance teams managing water systems across single or multiple sites.

Real-time temperature profiling

Continuous monitoring at tanks, calorifiers, loops, and sentinel outlets. Every reading timestamped and stored, never a gap in your record.

HSE L8 threshold alerting

Thresholds checked against HSE L8 and ACoP guidance. Alerts fired immediately when cold water exceeds 20C or hot water falls below 50C at point of use.

Missed-flush detection

AQUAIOT detects when scheduled flushing routines are not completed and generates an automatic alert, so no event is undocumented.

Tamper-evident audit trails

Every reading and action is logged with a secure, unalterable timestamp. Exportable records ready for audit, inspection, or HSE enquiry at any time.

API / BMS / CAFM integration

Open and interoperable. AQUAIOT connects to your existing SCADA, AIMS, CAFM, and BMS platforms via RS485/Modbus or REST API, no lock-in.

Retrofit-friendly deployment

Non-invasive sensors designed for live environments. No pipe cutting, no shutdown. AQUAIOT engineers handle site survey, installation, and commissioning.

Compliance & Standards

Aligned to the standards your auditors check.

HSE L8 & HSG274 Part 2 Auto-Written Logbook Tamper-Evident Instant Export
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No commitment. Talk to our engineering team.

Who It’s For

Built for the teams responsible

Housing Providers

Protect tenants. Prove compliance.

Housing associations and registered providers carry a statutory duty of care over water systems in their properties. Manual L8 management across multiple sites is operationally fragile, and increasingly under scrutiny.

  • Continuous monitoring across all properties, single dashboard view
  • Automatic alerts when vacant properties develop risk conditions
  • Audit-ready records for insurance, regulatory, and legal purposes
  • CAFM and property management system integration
NHS & Public Sector

Clinical-grade water safety. Without the admin burden.

NHS Estates and public sector facilities operate under HTM 04-01 and HSE L8 obligations. The complexity of large estates, multiple buildings, and dense pipework makes manual monitoring inadequate at scale.

  • Dense outlet coverage across clinical environments
  • Real-time temperature monitoring at thermostatic mixing valves and outlets
  • Integration with existing BMS and CAFM infrastructure
  • Automated compliance records compatible with HTM 04-01 requirements
Facilities & Estates

Less time on rounds. More time on management.

Commercial estates, universities, leisure facilities, and large offices face the same challenge: manual L8 inspection rounds are resource-intensive and provide only a snapshot. Automation changes that calculus entirely.

  • Replace labour-intensive manual rounds with automated monitoring
  • Role-based dashboard access for estates managers, deputies, and contractors
  • Reduce reactive call-outs, detect issues before they escalate
  • On-demand compliance reports for building managers and insurers
Defence & Secure Sites

Secure by design. Compliant by default.

Defence estates, MoD sites, and government facilities carry the same L8 duty of care as any other property, often across aging, complex pipework that is hard to reach and harder to document. Manual rounds leave gaps AQUAIOT closes permanently.

  • Encrypted telemetry, cellular and LoRaWAN with secure payload transmission
  • Tamper-evident immutable logs with timestamps and user actions
  • Role-based dashboard access, right records to the right people
  • Auditable compliance records meeting MoD and government estate requirements
Open, interoperable systems. No lock-in. Engineered for operational environments.
Cellular + LoRaWAN telemetry Encrypted payloads & OTA updates RS485/Modbus + REST API Role-based cloud dashboards CAFM / BMS compatible
Questions & Answers

Digital Legionella logbook, answered

What is a digital Legionella logbook?
A digital Legionella logbook is an electronic record of the temperature readings, alerts, and actions that evidence your water safety regime, kept in place of a paper book. With AQUAIOT the logbook is written automatically from the sensors, so it holds a continuous, timestamped record of every monitored point rather than depending on someone visiting each one and writing the reading down by hand.
How is it better than a paper logbook?
A paper logbook relies on people to visit, read, and record on time and legibly, so it accumulates gaps, late entries, and unreadable notes. A digital logbook captures every reading directly and continuously, with secure timestamps that cannot be backfilled. It is complete, consistent, and searchable, and it is ready to export the moment it is needed rather than requiring hours of compiling.
Can we export it for an inspection or audit?
Yes, on demand and in minutes. Because the data is stored continuously and in order, you can produce the logbook for a specific asset, building, or period immediately when an inspector, insurer, or auditor asks. There is no gathering of paper or filling of gaps, just an export of a record that has been building itself continuously since the system was commissioned.
Are the entries tamper-evident?
Yes. Every reading and alert is held with a secure timestamp in tamper-evident logs, so entries cannot be quietly altered or added after the fact. This matters when the logbook may be examined under regulatory, insurance, or legal scrutiny, because it demonstrates what was measured, exactly when, and that the record reflects the data rather than a later reconstruction of it.
Does it log actions as well as temperatures?
Yes. Alongside continuous temperatures, the logbook captures threshold breaches, missed flushes, and the alerts these trigger, all timestamped. This means the record shows not only the routine readings but the events and the responses to them, giving a fuller picture of how the regime actually ran than a book of temperature columns alone can provide.
Does a digital logbook satisfy our recordkeeping duty?
It strengthens it. ACoP L8 expects records of monitoring and remedial action, and a continuous, tamper-evident, exportable logbook is far stronger evidence than sparse manual entries. Responsibility for the regime and its records remains with your duty holder; AQUAIOT makes the monitoring record automatic, complete, and defensible, so the recordkeeping element of your regime is no longer the weak link.
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Keep a logbook that writes itself.

Talk to our engineering team about a digital Legionella logbook that stays current automatically and exports on demand.

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Digital Legionella Logbook – Speak to an AQUAIOT engineer about your estate.
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