Is LEV Testing a Legal Requirement? Your Duties Under COSHH

If your business runs any kind of dust or fume extraction, it is worth knowing whether testing it is genuinely required or just sensible housekeeping. The answer is firmer than a lot of owners expect, and getting it wrong carries real consequences. Here is a straight answer on whether LEV testing is a legal requirement, what the law asks of you, and what happens if you ignore it.

Is LEV Testing a Legal Requirement?

Yes. LEV testing is a legal requirement under the Control of Substances Hazardous to Health Regulations 2002 (COSHH). Regulation 9 requires local exhaust ventilation to be thoroughly examined and tested at least every 14 months by a competent person, with records kept. It is not optional, and routine servicing does not count.

The duty sits with the employer, even if the testing itself is outsourced. We carry out LEV examinations across Berkshire and the surrounding counties, and the 14-month duty is one of the most commonly overlooked obligations we come across.

What the Law Requires

LEV does not sit in a regulation of its own. It sits inside COSHH, which sets out a clear chain of duties. The HSE's LEV guidance explains it in full, but in practice you must make sure that:

• The LEV is maintained in efficient working order, good repair and a clean condition

• It is thoroughly examined and tested at least every 14 months

• Higher-risk processes listed in COSHH Schedule 4 are tested more often, frequently every 6 months

• The test is carried out by a competent person

• Records of tests and repairs are kept, typically for at least 5 years

• Any faulty system is repaired and re-tested before it is relied on again

That 14-month figure is the maximum gap the law allows for most systems, not a default that suits every process. The right interval comes from your risk assessment.

Which Systems Need Testing?

The duty applies to any engineered system used to control exposure by extracting hazardous dust, fume, mist or vapour at source. If it captures a contaminant to protect people, it almost certainly counts as LEV.

That covers a wide range of kit. A wood dust extraction system, for example, often needs more frequent testing because of the known link between wood dust and nasal cancer, while a spray booth handling paint and solvents is squarely caught too. If you are unsure whether a system qualifies, assume it does until a competent person tells you otherwise.

Testing Is Not the Same as Servicing

This is where businesses most often fall short. Servicing keeps an LEV system running between tests, with filter changes, cleaning and repairs. The thorough examination and test is the separate, statutory check that proves the system still controls exposure as intended.

A service log full of filter changes does not satisfy Regulation 9. In our experience, an HSE inspector will ask for the LEV test report before they so much as look at the system, because the documented test is the substance of compliance.

What Happens If You Don't Test It

Because it is a legal duty, the consequences of skipping LEV testing are real. The HSE can issue improvement and prohibition notices and prosecute, and a missing test report can invalidate your insurance if a claim ever arises.

The bigger cost, though, is health. LEV controls the substances behind serious, often irreversible conditions like occupational asthma, lung disease and cancer, and the damage usually shows up years later. Our thorough examination services cover the testing side, but the point of the test is to confirm the system is actually protecting your people.

The Bottom Line on LEV Testing and the Law

LEV testing is a legal requirement, full stop. For most systems that means a thorough examination and test at least every 14 months by a competent person, with shorter intervals for higher-risk work.

The straightforward part is knowing that. The practical part is scheduling the test, keeping it separate from your servicing, and holding on to the records, which is what keeps you compliant, insured and on the right side of the HSE.