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Legionella Monitoring for NHS Estates

Clinical water safety,
continuously monitored.
Without the rounds.

Wireless temperature sensors at tanks, calorifiers, loops, and sentinel taps across acute, mental health, and community sites, checking thresholds against HTM 04-01 and HSE L8 automatically, around the clock.

Speak to an Expert See how it works
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
Dense estates outpace manual roundsLarge hospital sites carry thousands of outlets across complex pipework. A weekly clipboard round cannot cover them, and the gaps sit in your compliance record.
Vulnerable patients raise the stakesImmunocompromised and elderly patients are most exposed to waterborne risk. Temperatures that drift between visits put the most fragile people on your site at risk.
TMV and outlet checks are labour heavyProfiling thermostatic mixing valves and sentinel outlets by hand absorbs estates hours that are already stretched across the trust.
Inspections demand instant evidenceWhen the HSE or a CQC inspector asks for temperature history, paper logbooks across multiple buildings take days to compile and still leave holes.
The AQUAIOT Solution

Continuous visibility.
HTM-ready records.
Less time on rounds.

AQUAIOT replaces labour-intensive manual rounds with continuous automated monitoring across your estate, so your L8 and HTM 04-01 record is always current, always accurate, and always ready for inspection.

Real-time temperature profiling at calorifiers, loops, thermostatic mixing valves, and sentinel outlets, continuous rather than periodic.
Threshold alerts against HSE L8 and HTM 04-01, immediate SMS, email, and app notification when temperatures drift into risk zones or a flush is missed.
Tamper-evident, exportable audit trails, BMS, CAFM, and API integration for instant compliance evidence across every building.
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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.

HTM 04-01 Compatible HSE L8 & HSG274 Part 2 Immutable Timestamped Logs Exportable Evidence
Book a Demo

No commitment. Talk to our engineering team.

Who It’s For

Built for every part of the trust estate

Acute Trusts

Dense coverage for complex acute sites.

Acute hospitals combine high outlet density, augmented care areas, and ageing pipework. Manual monitoring cannot keep pace with the scale, and the consequences of a missed temperature in a clinical setting are serious.

  • Continuous monitoring across wards, theatres, and plant rooms from one dashboard
  • Real-time profiling at calorifiers, loops, and sentinel outlets
  • Threshold alerts checked against HTM 04-01 and HSE L8 guidance
  • BMS and CAFM integration for estates and infection prevention teams
Mental Health Units

Patient safety on lower-staffed sites.

Mental health units often run smaller estates teams across dispersed buildings, where little-used outlets and quiet wings create stagnation risk that manual rounds miss between visits.

  • Automatic alerts when low-use outlets develop risk conditions
  • Continuous profiling without adding to estates round burden
  • Audit-ready records for trust governance and HSE enquiries
  • Role-based dashboard access for estates and responsible persons
Community & Primary Care

Multi-site visibility from one screen.

Community clinics, health centres, and primary care sites are spread across a wide geography, making consistent L8 monitoring operationally fragile and expensive to deliver by hand.

  • Single dashboard view across every community site
  • Continuous monitoring without travelling to each property
  • Cellular and LoRaWAN telemetry for sites with limited infrastructure
  • Exportable evidence for each location on demand
Estates & Facilities Teams

Less time on rounds, more on management.

NHS estates and facilities teams carry L8 and HTM 04-01 obligations across the whole site while resources stay tight. Automation frees skilled people from clipboard rounds and gives the responsible person a live picture.

  • Replace labour-intensive manual rounds with automated monitoring
  • Reduce reactive call-outs by detecting drift before it escalates
  • Tamper-evident records for audits, inspections, and insurers
  • Retrofit-friendly install with no shutdown of clinical water systems
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 monitoring for NHS estates, answered

How does automated monitoring support HTM 04-01 and HSE L8 in NHS estates?
AQUAIOT records temperatures continuously at calorifiers, loops, thermostatic mixing valves, and sentinel outlets, and checks them against HSE L8 and HTM 04-01 guidance. It strengthens the duty holder’s written scheme of control with a complete, tamper-evident record, while responsibility for the overall control scheme remains with the trust.
Can sensors be fitted without disrupting clinical water systems?
Yes. AQUAIOT sensors are designed for retrofit in live environments, with no pipe cutting and no shutdown required. Our engineers handle the site survey, installation, and commissioning around clinical activity.
Does it monitor thermostatic mixing valves and sentinel outlets?
Yes. Coverage includes cold water storage tanks, calorifier flow and return, hot water loops, thermostatic mixing valves, and sentinel outlets, with dense coverage possible across complex hospital buildings.
How quickly can we produce temperature records for a CQC or HSE inspection?
Every reading and alert is held in tamper-evident logs with secure timestamps and is exportable on demand, so producing evidence for an inspection takes minutes rather than days of compiling paper logbooks across buildings.
Will it integrate with our existing BMS and CAFM platforms?
Yes. AQUAIOT is open and interoperable, connecting to SCADA, AIMS, CAFM, and BMS platforms over RS485/Modbus or REST API, with no vendor lock-in.
How does monitoring help with low-use outlets and quiet wards?
Continuous profiling catches stagnation and temperature drift at little-used outlets between manual rounds, and sends immediate SMS, email, or app alerts when readings move into risk zones or a flush is missed.
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Ready when you are

Stop managing Legionella risk across the estate by hand.

Talk to our engineering team about continuous monitoring, automated alerts, and HTM-ready compliance records for your NHS site.

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NHS Legionella Monitoring – Speak to an AQUAIOT engineer about your estate.
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