Defensibility,
convenience and assurance.

Duty to control the Legionella risk so far as reasonably practicable, with a named responsible person and written risk assessment, reviewed when no longer valid.

Sets the standard by which the HSWA/COSHH duty is judged — follow it for presumed compliance, or show an equally effective alternative.

HSE guidance covering evaporative cooling (Part 1), hot & cold water systems (Part 2) and other risk systems (Part 3); its frequencies are recommendations the risk assessment adopts or beats, not statutory intervals.

The 2024 endorsement of IoT continuous monitoring as a substitute for elements of manual Legionella inspection — the permission layer for what BlueMetric does.

Department of Health Technical Memorandum 04-01 for Healthcare, CQC-registered care homes and augmented-care areas — distribution ≥ 55 °C with tighter sentinel coverage.

The international standard for Legionella sampling and lab analysis; sampling is risk-based, not routine for temperature-controlled systems unless control is in doubt. Performed by our accredited partner laboratory.

Cooling towers and evaporative condensers are notifiable to the local authority — a higher-risk pathway in HSG274 Part 1 with a tighter monitoring and treatment regime.

BREEAM In-Use credit for continuous Legionella monitoring evidence — often relevant for residential, PBSA and healthcare REIT reporting.

From 27/10/2025, on becoming aware of a damp/mould hazard a social landlord must investigate within 10 working days, report to the resident within 3 working days, begin remedial action within 5 working days, and make safe within 24 hours for an emergency. Sits within s.10A Landlord & Tenant Act 1985.

Damp & mould is a Category 1 hazard under HHSRS where serious risk is present — enforced by local authorities across all rented housing, social and private.

Applies to all PRS tenancies from 20/03/2020 — the dwelling must be fit for human habitation throughout, free from serious HHSRS hazards including damp and mould.

Workplace (Health, Safety and Welfare) Regs 1992, reg.6 (ventilation) and reg.9 (cleanliness); a general HSWA s.2/s.3 duty to control health risks, with no fixed frequency.

New dwellings must limit hot water at a bath outlet to a safe maximum — bath fill ≤ 48 °C, the highest scald-injury route.

For healthcare premises, NHS HTM 04-01 Part B sets the TMV verification regime — re-test ~ 6–8 weeks then ~ 12–15 weeks after commissioning, then ≥ annually if stable.

Health and Social Care Act 2008 (Regulated Activities) Regs 2014, reg.12 — providers must mitigate risks to service-user safety; bath water above ~ 44 °C is a scald risk for vulnerable users, with assisted bathing around 41 °C.

TMV2 (domestic) and TMV3 (healthcare) set commissioning, in-service testing and the fail-safe (cold shut-off) test regime; annual is the common baseline, tightened in healthcare and vulnerable settings.

Insurers increasingly require active leak detection, accessible isolation valves and inspection regimes on high-value assets; breaching a policy warranty can reduce or void cover.

Repairing covenants in commercial leases are the practical source of an inspection duty in let property — periodic checks of concealed pipework, plant rooms and risers, tighter on multi-tenant high-rise.

Approved Documents H (drainage) and G (water) apply at construction and alteration, not as an ongoing inspection cycle — compliance at install, with an inspection regime on top.

Negligence and the Defective Premises Act 1972 bite where a leak causes loss or harm; a continuous record of detection and response is the evidence of duty discharged.

The Health and Safety at Work Act's "reasonably practicable" test moves with industry practice — continuous monitoring is the rising institutional baseline, lifting the manual-check floor with it.

Legionella is a biological hazard under COSHH; biocide dosing and damp/mould cleaning regimes engage COSHH wherever active substances are used.

Civil Evidence Act 1995, PACE 1984 and the "reasonably practicable" standard all reward a contemporaneous, tamper-evident record authenticated end-to-end.