Workplace Air Monitoring London

Air monitoring for London workplaces

London's exposure risk profile is dominated by construction and refurbishment. Cutting, chasing, drilling and demolition on tightly constrained city-centre plots generate respirable crystalline silica in enclosed spaces where natural dilution is poor, and basement excavation and fit-out work add diesel exhaust emissions from plant working under cover.

Beyond construction, the capital has a dense base of food production and commercial catering, printing and signage, joinery workshops, laboratory and pharmaceutical facilities, and building services contractors carrying out hot works in plant rooms and risers. Each brings a different contaminant — flour dust, isocyanates in spray finishing, solvent vapours, welding fume — and each needs a sampling strategy matched to the task rather than a generic survey.

We work around London's practical constraints: restricted site access, night and weekend shifts, the ULEZ and Congestion Charge zones, and multi-contractor sites where a single trade's exposure must be isolated from everyone else's.

Exposures we commonly measure in London

Every survey is scoped to your own processes, but these are the exposures that most often drive monitoring programmes across Greater London and the M25.

Respirable crystalline silica from concrete cutting, chasing and demolition on city-centre plots
Diesel exhaust emissions (DEEE) from plant in basements and enclosed podium levels
Welding and hot-works fume during building services and steelwork installation
Flour dust and cleaning-chemical exposure in bakeries and food production units
Solvent and isocyanate vapours in joinery, spray finishing and signage workshops

What workplace air monitoring covers

Workplace air monitoring measures what your employees actually breathe during normal work. Under Regulation 10 of the Control of Substances Hazardous to Health Regulations 2002 (COSHH), employers must monitor exposure where it is needed to protect health, where a workplace exposure limit could be exceeded, or where control measures need to be shown to be working.

We sample dusts, fumes, vapours, mists and gases — including respirable crystalline silica, welding fume, inhalable and respirable dust, solvent vapours and process chemicals — using calibrated pumps worn in the breathing zone across a representative full shift, supported by static sampling to map sources around the workplace.

Samples are analysed by an accredited laboratory using the relevant MDHS or ISO method and compared with the workplace exposure limits published in HSE guidance note EH40. Compliance is judged using the BS EN 689 statistical framework rather than a single reading, and short-term (15-minute) sampling is added wherever peak tasks matter.

You receive an occupational hygiene report setting out measured concentrations, the compliance position, the adequacy of controls such as local exhaust ventilation, practical recommendations and a defined re-monitoring interval — evidence that stands up to HSE, insurers and client audits.

Areas we cover from London

Our hygienists mobilise across Greater London for early starts, night works and weekend shutdowns, and can cover multiple sites in one visit where a contractor is running several London projects.

City of London and Canary Wharf

East London — Stratford, Barking, Dagenham

West London — Park Royal, Hayes, Heathrow

South London — Croydon, Sutton, Bromley

North London — Enfield, Tottenham, Wembley

Home Counties within the M25 — Watford, Dartford, Romford

Working elsewhere in the UK? See our full list of monitoring locations or the main workplace air monitoring service page.

Arrange monitoring in London

Tell us what you make, the substances involved and how many people are exposed, and we will scope a representative programme with a fixed price. Call 0800 494 7215 or request monitoring online. Prefer a visit first? You can book a site assessment or speak to a consultant.

London air monitoring FAQs

Can you carry out air monitoring on a live central London construction site?

Yes. We routinely sample on occupied and live sites inside the M25, working to the principal contractor's induction, permit and RAMS requirements. Personal samplers are lightweight and worn under PPE, so operatives continue working normally through the shift.

Do you cover night shifts and weekend possessions in London?

We do. A large share of London fit-out, rail and highways work happens outside normal hours, so we schedule hygienists for night and weekend attendance to capture genuinely representative exposure rather than a convenient daytime sample.

Which London industries most often need silica monitoring?

Construction, demolition, groundworks, stone masonry and worktop fabrication. Any task that cuts, grinds or breaks concrete, brick, stone or engineered stone can exceed the 0.1 mg/m³ respirable crystalline silica limit within a fraction of a shift.

How quickly can you attend a site in Greater London?

For most London postcodes we can usually offer attendance within five to ten working days, and sooner where an HSE improvement notice or an urgent tender deadline applies.

Workplace Air Monitoring in London