5 Common Workplace Air Pollutants - and How to Mitigate Them

Clean air in the workplace isn’t a luxury — it’s a legal and moral obligation. In the UK, employers have a duty under the Control of Substances Hazardous to Health (COSHH) Regulations to manage exposure to airborne contaminants. Yet many environments still face risks from pollutants that are invisible, often odourless, and easy to overlook.

As an industrial hygienist, I’ve assessed countless workplaces — from workshops and warehouses to offices and laboratories. Below are five of the most common airborne hazards I encounter and practical ways to manage them.

1. Respirable Dust (e.g. Silica, Wood, Flour Dust)
Where it’s found: Construction, joinery, bakeries, manufacturing.
Risks: Long-term exposure can lead to silicosis, asthma, and chronic obstructive pulmonary disease (COPD).
Mitigation Tips:

• Use LEV (Local Exhaust Ventilation) at the source of dust.

• Provide and enforce the use of RPE (Respiratory Protective Equipment).

• Conduct regular air monitoring and health surveillance.

• Train staff on proper cleaning (no dry sweeping!).

2. Diesel Exhaust Emissions (DEEE)
Where it’s found: Warehouses, underground plant rooms, construction sites.
Risks: Linked to lung cancer and respiratory irritation.
Mitigation Tips:

• Switch to electric or low-emission alternatives where possible.

• Ventilate enclosed spaces thoroughly.

• Monitor exposure using Elemental Carbon (EC) sampling.

• Limit engine idling and schedule maintenance regularly.

3. Volatile Organic Compounds (VOCs)
Where it’s found: Paints, solvents, cleaning agents, adhesives.
Risks: Headaches, nausea, and long-term organ damage with repeated exposure.
Mitigation Tips:

• Use low-VOC or water-based alternatives.

• Improve general and local ventilation.

• Store chemicals in sealed containers and ventilated cabinets.

• Rotate tasks to limit exposure time.

4. Welding Fumes
Where it’s found: Fabrication workshops, shipyards, vehicle repair.
Risks: Fumes may contain manganese, chromium VI, and other metals — all harmful to lungs and nervous system.
Mitigation Tips:

• Use on-torch extraction or fume hoods.

• Ensure proper welding bay separation and airflow.

• Provide appropriate RPE, especially for stainless steel work.

• Train welders on safe practices and PPE care.

5. Carbon Monoxide (CO)
Where it’s found: Poorly ventilated spaces with fuel-burning appliances or machinery.
Risks: CO is odourless and deadly at high concentrations.
Mitigation Tips:

• Fit CO alarms in high-risk areas.

• Ensure adequate ventilation, especially in enclosed plant rooms.

• Maintain equipment regularly to prevent incomplete combustion.

• Educate staff to recognise early symptoms of CO poisoning (dizziness, headaches, confusion).

Workplace air quality is often out of sight, but it should never be out of mind. By understanding common air pollutants and proactively mitigating them, businesses can protect their people, stay compliant with UK regulations, and boost productivity. If you're unsure where to begin, consider a professional exposure assessment — it’s an investment in health and peace of mind.