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Legionella Risk Monitoring

Watch the risk.
Not just the date.
Continuously.

Your risk assessment tells you where the risk lives. AQUAIOT watches those points continuously, so the written scheme of control is backed by live readings rather than a calendar of overdue checks.

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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

Risk on the page.
Risk on the record.
In real time.

A risk assessment identifies the danger points; a monitoring regime proves they stay controlled. AQUAIOT turns the high-risk assets named in your assessment into continuously watched points feeding one dashboard.

Cover the assessed risk points, continuous temperature profiling at the tanks, calorifiers, loops, and sentinel outlets your risk assessment flags as high risk.
Live alerts on rising risk, immediate SMS, email, and app notification when a reading drifts into the danger zone or a control measure lapses.
Evidence for the written scheme, tamper-evident timestamped records that show the control measures in your scheme are actually holding, exportable on demand.
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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 Risk Assessment Support Written Scheme Evidence Continuous Watch
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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

Legionella risk monitoring, answered

What is Legionella risk monitoring?
Legionella risk monitoring is the continuous measurement of the conditions that drive Legionella risk, principally water temperature, at the points your risk assessment identifies as high risk. Instead of confirming control on periodic rounds, fixed sensors profile those assets around the clock. The data shows whether the control measures in your written scheme are actually holding.
How does monitoring support the risk assessment?
A risk assessment names the assets, conditions, and control measures that manage Legionella risk in your system. AQUAIOT instruments the high-risk points it identifies and watches them continuously, so the assessment is backed by live evidence rather than assumption. When the assessment is reviewed, you have a continuous record of how the system has actually behaved since the last one.
Does this connect to the written scheme of control?
Yes. The written scheme of control sets out the temperatures and actions that manage risk under HSE guidance. AQUAIOT records those temperatures continuously and alerts when a control measure lapses, so the scheme is evidenced as it is followed. Responsibility for setting and owning the scheme remains with your duty holder.
Will it tell us when risk is rising?
Yes. AQUAIOT alerts the moment a reading drifts towards the Legionella risk window or an expected control action, such as a flush, is missed. Notifications go out by SMS, email, and app with role-based routing, so a rising risk is acted on early rather than discovered at the next scheduled visit.
Which standards does the monitoring align to?
Thresholds are checked against HSE guidance, principally the Approved Code of Practice L8 and HSG274 Part 2, with healthcare estates mapping to HTM 04-01. You set the targets for each high-risk asset, and AQUAIOT records and alerts against them, providing evidence aligned to the framework your assessment and scheme follow.
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Ready when you are

Turn your risk assessment into live evidence.

Talk to our engineering team about continuous monitoring of the high-risk points in your risk assessment and written scheme of control.

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