Misunderstandings cost time, money and health. Here are the common myths we see on UK sites, and what to do instead to keep airborne particulate under control and meet COSHH duties.

Myth 1: Water alone solves dust

Water suppression reduces visible dust but does not eliminate respirable fractions like PM2.5 or RCS. Use it as a complement to tool-mounted extraction and air filtration, not a replacement.

Myth 2: Sweeping is fine if you are quick

Dry sweeping re-suspends fine dust and spreads contamination. Use an industrial vacuum with M-Class or H-Class filtration, then damp-wipe surfaces. Avoid compressed air entirely.

Myth 3: Any mask will do

Disposable face coverings are not RPE. For hazardous dusts, select appropriate, fit-tested RPE and treat it as the last line of defence after engineering controls.

Myth 4: Big free-air numbers mean strong extraction

Free-airflow ratings do not reflect performance under load. Choose equipment based on airflow under load and maintain filters, seals and hoses to keep capture effective.

Myth 5: One H-Class vacuum covers the whole site

Match the solution to the task. Use source capture on tools, air scrubbers or negative air machines for room control, and housekeeping vacuums for clean-up. No single unit does it all.

What to do instead

• Apply the three-layer approach: capture at source, control the air, and clean surfaces without re-agitating dust.
• Plan airflow. Position air scrubbers to pull from dirty to clean, with a single make-up air path.
• Measure. Use a PM meter to confirm controls keep levels low across the shift.
• Maintain. Check filters, bags and hoses; replace when performance drops.

Debunking these myths turns guesswork into a repeatable dust control process that meets HSE expectations and protects workers.