Standards · Compliance map
The codes your auditor will ask about — covered.
Compliance isn't a deliverable; it's the foundation. Every BWS service is delivered to a named industry standard, with evidence and certification mapped to it. Here's the full compliance map.
Reference map
Sixteen standards. One audit-ready evidence base.
ACOP L8
Legionella Control — HSE Approved Code of Practice
The legal benchmark for control of Legionella in water systems. Sits on the Health & Safety at Work Act 1974 and COSHH 2002.
The legal benchmark for control of Legionella in water systems. Sits on the Health & Safety at Work Act 1974 and COSHH 2002.
HSG274 Pt 1
Cooling Towers & Evaporative Condensers
HSE technical guidance for the highest-risk Legionella system class. Backed by the Notification of Cooling Towers Regulations 1992.
HSE technical guidance for the highest-risk Legionella system class. Backed by the Notification of Cooling Towers Regulations 1992.
HSG274 Pt 2
Hot & Cold Water Systems
Practical detail behind L8 for the systems present in every building — flushing, temperature monitoring, calorifier inspection, sampling.
Practical detail behind L8 for the systems present in every building — flushing, temperature monitoring, calorifier inspection, sampling.
HSG274 Pt 3
Other Risk Systems
Spa pools, humidifiers, ornamental fountains, dental units, vehicle washes — anywhere water aerosolises.
Spa pools, humidifiers, ornamental fountains, dental units, vehicle washes — anywhere water aerosolises.
BS7592:2022
Sampling for Legionella
The methodology — container, transport, hold time. Get this wrong and the result is meaningless.
The methodology — container, transport, hold time. Get this wrong and the result is meaningless.
BS8552:2012
Sampling of Closed Heating & Cooling Systems
Quarterly sampling of closed water systems for chemistry and microbiology — feeds the BG50 acceptance regime.
Quarterly sampling of closed water systems for chemistry and microbiology — feeds the BG50 acceptance regime.
BS8558
Potable Water — Design, Install, Disinfection
Code of practice for services supplying water for domestic use — including BS8558 disinfection certification.
Code of practice for services supplying water for domestic use — including BS8558 disinfection certification.
BSRIA BG29/2021
Pre-Commission Cleaning of Pipework
Flushing, chemical cleaning, passivation — the gateway standard for closed water systems pre-handover.
Flushing, chemical cleaning, passivation — the gateway standard for closed water systems pre-handover.
BSRIA BG50
Water Treatment for Closed Systems
Ongoing chemistry for heating and chilled circuits — what 'clean' looks like for the life of the building.
Ongoing chemistry for heating and chilled circuits — what 'clean' looks like for the life of the building.
BG04 / BS2486
Steam Boiler Water Treatment
The chemistry standards for treating water in steam boilers and water heaters — feedwater, condensate, boiler chemistry.
The chemistry standards for treating water in steam boilers and water heaters — feedwater, condensate, boiler chemistry.
CIBSE Code M
Commissioning Management
The UK headline guidance for managing commissioning on a construction project.
The UK headline guidance for managing commissioning on a construction project.
CIBSE Code A / W
Air and Water Distribution Balancing
Technical standards for balancing and validating ductwork and pipework distribution.
Technical standards for balancing and validating ductwork and pipework distribution.
BESA TR19®
Internal Cleanliness of Ventilation
Industry standard for ductwork hygiene including kitchen extract cleaning intervals.
Industry standard for ductwork hygiene including kitchen extract cleaning intervals.
DW144
Sheet Metal Ductwork Specification
The design standard against which ductwork cleanliness is verified.
The design standard against which ductwork cleanliness is verified.
HTM 04-01
NHS Water Safety
Healthcare technical memorandum — safe water in healthcare premises, including augmented care.
Healthcare technical memorandum — safe water in healthcare premises, including augmented care.
HTM 03-01
NHS Specialised Ventilation
Healthcare ventilation hygiene — operating theatres, isolation rooms, decontamination spaces.
Healthcare ventilation hygiene — operating theatres, isolation rooms, decontamination spaces.