Background and Regulations
The Regulations relate to:
- Sensory effects, which include; nausea, vertigo and flickering sensations in peripheral vision
- Health effects, which include; shocks, nerve stimulation and heating effects
- Indirect effects which include; interference with active or passive implanted or body-worn medical devices and uncontrolled attraction of ferromagnetic objects, ie the risk of injury from objects in a large static magnetic field being attracted to magnets in the workplace and hitting anyone in the way.
The Regulations do not address suggested long-term effects of exposure to EMFs, as there is currently no well-established scientific evidence of a causal relationship. Should scientific evidence emerge in the future, HSE will consider this, taking appropriate scientific advice from Public Health England.
No, HSE supports the continuation of all current EMF work activities where employees are properly protected and the requirements of the CEMFAW Regulations are met.
The majority of employers will not need to take any additional action to reduce the risk from EMFs, this is because either:
- the levels of EMFs in most workplaces are already at safe levels; or
- in workplaces where employees may be exposed to higher levels of EMFs, the levels and associated risks will already have been assessed and managed.
Many sources of EMF in the workplace produce such low levels of EMF that it is likely that, other than assessing exposure to EMFs, the measures you already have in place to manage risks will be sufficient to ensure employees are protected and to meet the requirements of these Regulations. The information contained in HSG 281 - The guide to the Control of Electromagnetic Fields at Work Regulations 2016, will help you with this.
ALs and ELVs
Exposure may exceed the sensory effect ELVs during work activities, as long as the applicable safety conditions are met and employees remain protected.
The levels of EMF that will lead to a worker experiencing a sensory effect are lower than those that will lead to a health effect.
Employees should not be exposed to EMFs which could lead to them experiencing health effects; compliance with the health effect ELVs is a way of ensuring this. This ELV includes a margin for safety to take account of factors such as an individual's height and stature. However, it must always be remembered that the health ELVs are not a line between safe and dangerous. In most cases the onset of health effects will be a very weak effect, once the threshold has been exceeded. The health effects ELVs are set well below this onset of health effects threshold. The severity of the effect will increase with increasing exposure levels (ie these are deterministic effects).
If employees experience sensory effects, they will not suffer harm if there are no indirect consequences. For example, if someone is exposed while working on a structure at height, such that they are constantly experiencing micro-shocks, the distraction caused may lead to performance errors or to them losing grip on the structure or tools, injuring themselves or others.
If employees are likely to be exposed to EMFs that will lead to the sensory effects ELVs being exceeded, this is permissible, if certain safety conditions, specified in the Schedule to the CEMFAW Regulations, are met.
Exemptions
To make sure that an exemption is still needed, HSE will periodically review the position. Changes in the work activity process or the installation of new equipment that incorporates engineering controls could make an exemption unnecessary. As technology develops and older equipment is replaced, it is probable that an exemption will not be required where equipment using the new technology is used.
To ensure the requirement for an exemption is reviewed, exemptions will be limited for a certain length of time and the review will check that the activity still needs to be carried out and meets the criteria for an exemption.
If the position has not changed, then the exemption may be extended.
You must ensure that:
- Even though exposure is permitted to be above the ELVs, dutyholders are still required to bring exposures to the lowest levels they can, ie that the ELVs are exceeded only to the lowest extent reasonably practicable, and therefore, that the risk that any unintended increase in exposure, which could cause harm is minimised and;
- employees must be protected against the health effects and safety risks posed by those exposures.
Faults, by definition, are unplanned and unpredictable events. In terms of EMF exposure, it is generally not realistic or proportionate to expect employers to predict a fault condition, where or when a fault may occur, or how close an employee may be at the time of the transient (which may also be caused by switching events) current flow.
Exemptions are more appropriate for planned and predictable work activities in respect of which the employer can clearly demonstrate measures to ensure compliance with any exemption conditions. HSE's proportionate enforcement policy will reflect what can reasonably be expected of employers in these situations. In addition, how employers ensure safety in general during fault conditions will already be considered as part of normal enforcement activity.
HSE may exempt specific work activities from the exposure limits stated in the Regulations; any exemption is subject to certain safety conditions being met. Any exemption can be revoked or amended by HSE at any time. Full information on exemptions is available in HSG 281 - The guide to the Control of Electromagnetic Fields at Work Regulations 2016. Details of activities for which an exemption is available can be found on the exemption page[1].
Regulation 13(1) of CEMFAW Regulations grants the Health and Safety Executive (HSE) power to exempt employers from the exposure limits contained in the Regulations. An exemption would only be necessary if your work activity cannot comply with the health effect ELVs. Any exemption will be subject to safety conditions being met. It should be remembered that exposure limits are not a line between safe and dangerous exposures.
If HSE exempts an activity from the exposure limits, you as the employer must ensure that:
- exposure is as low as reasonably practicable; even though exposure is permitted to be above the ELVs you are still required to bring exposure to the lowest levels you can, ie you must ensure the ELVs are exceeded to the lowest extent reasonably practicable. To help you with this you may wish to consider the information HSG281 under 'Is an action plan needed?', and;
- your employees are protected against the health effects and safety risks posed by that exposure.
Full details of exempted activities and the safety conditions can be found on the exemption page[2].
Exposure Assessment
In most cases, you should be able to find enough information from current sources to allow you to undertake a suitable and sufficient assessment of the EMF levels. For many businesses, consulting tables 2, 3, 5, 6 and 7 in HSG 281 - The guide to the Control of Electromagnetic Fields at Work Regulations 2016, may be enough to demonstrate that exposure does not exceed the ELVs.
No, in most cases, you should be able to find enough information from current sources to allow you to undertake a suitable and sufficient assessment of the EMF levels. For many businesses, consulting HSG 281 - The guide to Electromagnetic Fields at Work Regulations 2016, will be enough to demonstrate that exposure does not exceed the ELVs. HSG 281 also includes links to other useful information such as the EC Non-binding guide to good practice for implementing Directive 2013/35/EU: Electromagnetic fields.
Measurements or calculations should only be needed by those employers using the more powerful equipment or highest currents, where pre-existing information is insufficient to determine that the health effects ELVs are not exceeded.
General
HSE provides information and guidance on EMFs for employees and employers. Public Health England (PHE) provides information on EMFs and public health[3].
PHE's role is to provide an integrated approach to protecting UK public health through the provision of support and advice. Public Health England has the statutory function of giving advice to Government on all radiation matters.
HSE has been involved in the following:
- Research Report 1018[4] – Electromagnetic Fields (EMF) in the welding environment - Prepared by TWI Ltd for the Health and Safety Executive.
- HSE-funded research commissioned from MCL-T Ltd (PDF) [5] on the potential impact of the Directive on MRI in healthcare was published on 13 June 2007.
- Research Report 338 (PDF) [6] - Measurement and analysis of magnetic fields from welding processes-Prepared by TWI Ltd for the Health and Safety Executive.