Airborne contaminants are among the most common and easily overlooked hazards in the workplace. Whether produced by industrial processes, routine activities, or accumulate over time, hazards such as airborne dusts, fumes, vapours and gases can have serious long-term effects on employee health. Under the Control of Substances Hazardous to Health Regulations (COSHH), employers have a legal duty to monitor these exposures and take proportionate action to control them.
At Envirochem, we help clients across construction, manufacturing, healthcare and more to assess their workplace air quality and meet these responsibilities with clarity and confidence. Our workplace air monitoring service identifies key risks, compares results against legal Workplace Exposure Limits (WELs), and provides clear guidance on any improvements needed to protect your workforce, providing recommendations for compliance and best practice controls.
What We Monitor
Workplace air monitoring doesn’t follow a one-size-fits-all approach. Different working environments pose different risks, and understanding exactly what’s in the air is essential before control measures can be evaluated.
We monitor and assess exposure to a range of airborne substances, including:
- Inhalable and respirable dusts such as silica, wood dust, flour dust and metal particulates, commonly found in construction, joinery and production work.
- Welding and diesel fumes, which carry fine particulates and harmful gases that can accumulate over time in enclosed or poorly ventilated areas.
- Volatile organic compounds (VOCs), solvents, and other chemical vapours, frequently used in labs, paint spraying, adhesives and chemical processing.
- Isocyanates, a potent sensitiser found in 2-part paints and glues.
- Carbon monoxide, carbon dioxide and general indoor air quality indicators which are often relevant in office environments, warehouses, or anywhere that ventilation and occupancy levels may be out of balance.
- Bioaerosols such as mould spores, bacteria and organic dusts, commonly found in waste processing or composting environments.
Every monitoring plan we create is based on a site-specific assessment and tailored to the substances, equipment, and activities present in your workplace.
Our Process
Our process begins with a walkthrough and consultation to understand your work environment, substances in use, and any known issues or concerns. This might be a planned compliance check, part of a routine occupational hygiene programme, or a response to new processes, materials or staff concerns.
We then deploy suitable sampling methods depending on the hazard type. For personal exposure monitoring, workers may be asked to wear discreet sampling equipment throughout their shift to gather data over their shift to produce results used in 8-hour time-weighted average calculations, or we may tailor monitoring to focus on specific tasks. In other cases, we may use static monitors or direct-read instruments to capture background levels or short-term peaks.
Where possible, samples are analysed by our in-house UKAS-accredited laboratory, and your results are benchmarked against HSE’s EH40 Workplace Exposure Limits, guidance or international Occupational Exposure Limits (OELs) to give you the best understanding of where your results sit. Where no official limit exists, we draw upon BOHS guidance and industry best practice to interpret findings responsibly.
Our reports go beyond listing figures by clearly explaining what those results mean in the context of your workplace. If action is required, we’ll outline practical next steps, such as improving ventilation, reviewing PPE use, or redesigning work practices to minimise exposure. If your existing controls are already effective, we’ll confirm that too, giving you the confidence to demonstrate compliance and adherence to best practices, and move forward.
When Is Air Monitoring Required?
Workplace air monitoring may be legally required under COSHH Regulation 10 if you’re using substances with known exposure limits, or if existing controls haven’t been shown to be effective. But many of our clients also come to us for peace of mind, either because they’ve introduced new materials, received employee complaints, or want to proactively manage risk before problems arise.
Monitoring is especially recommended when:
- Working with respirable crystalline silica (RCS), wood dust or other known carcinogens and sensitisers.
- Processes generate fumes or vapours in enclosed areas.
- You’ve recently updated control measures and want to verify their effectiveness, or you’re looking for information to inform purchase of new controls.
- You need evidence of compliance for internal audits, insurers or regulatory inspection.
- There are signs of poor indoor air quality affecting comfort, productivity, or wellbeing.
The Impact of Uncontrolled Airborne Hazards
Airborne hazards such as dusts and chemical vapours present serious risks not only to worker health, but also to business operations. These hazardous exposures often cause health problems over time, leading to preventable illnesses including chronic obstructive pulmonary disease (COPD), occupational asthma, silicosis, and even fatal cancers. The consequences include increased absenteeism, compensation claims, and the loss of experienced staff, all of which affect productivity and create lasting financial and reputational impacts.
Even where risks are known, adequate control measures are often inconsistently applied. In fast-changing environments such as construction sites or production areas, updates to materials, processes, or ventilation can quickly render existing controls ineffective. The Health and Safety Executive frequently cites failures in dust control, LEV maintenance, respiratory protective equipment programmes, and health surveillance in their reports - issues that are especially common in sectors where dust exposure is routine, and when your processes handle chemical agents such as solvents or heavy metals.
The risks are further compounded when hazards are process generated, such as welding task, or interaction between products. These exposures are rarely accounted for in standard risk assessments, yet they pose significant risk to worker health.
Failing to act early puts companies at increasing risk of enforcement action, workforce attrition, and long-term illness within their teams. These outcomes not only undermine compliance, but also threaten long-term operational resilience.
Routine workplace air monitoring plays a central role in preventing this by identifying risks, validating existing controls, and supporting targeted interventions that protect both people and business performance. By delivering clear, proportionate recommendations based on accurate exposure data, we help organisations move beyond reactive compliance and take meaningful steps toward sustainable occupational health management.
Why Choose Envirochem?
We believe effective occupational hygiene comes down to expert insight, clear communication and practical delivery. Our team of BOHS-qualified consultants bring years of field experience across high-risk and routine working environments. We also understand that air monitoring should fit around your operations, not disrupt them. That’s why we work flexibly, arriving site-ready and, where possible, combining air, noise and vibration assessments into a single visit.
Results are analysed through our own UKAS-accredited laboratory and most full reports are delivered within 30 working days, with critical issues communicated by our trained site team on the day of the survey. More importantly, we take the time to explain what the results mean, how they relate to your legal duties, and what actions should be taken.
Speak to Our Team
If you’re unsure whether workplace air monitoring is required in your business, or would like to talk through a particular concern or risk area, get in touch with our expert team. We’ll help you understand your responsibilities and develop a practical plan to meet them.