Request a callback ...

Would you like to speak to an expert

Please fill in the form below and we will call you back to discuss your needs:

Local: 01325 317777
National: 08719 769620

Services - L8 Risk Assessment in all premises and cooling towers

How can we Help?

Here at EHL UK we can offer you anything from monthly temperature checks & quarterly chlorination to full L8 control packages that include:

  • Risk assessment
  • Temperature regimes
  • Quarterly shower de-scale & disinfection
  • Yearly tank cleaning & chlorination
  • Calorifier & water system descaling
  • Sampling (approved UKAS laboratories are used)
  • Emergency disinfection
  • Maintenance & servicing of plant & equipment
  • We will contact you at every step of the way

Please call our offices and ask for a free consultation on what would best suit your needs. We are always happy to offer advice or answer any concerns or queries you may have.

What is Legionnaire's Disease?

Legionnaire's disease is potentially fatal pneumonia caused by legionella bacteria. It is the most well-known and serious form of a group of diseases known as legionellosis. Other similar (but usually less serious) conditions include Pontiac fever and Lochgoilhead fever.

Infection is caused by breathing in small droplets of water contaminated by the bacteria. The disease cannot be passed from one person to another. Everyone is potentially susceptible to infection but some people are at higher risk e.g. those over 45 years of age, smokers and heavy drinkers, those suffering from chronic respiratory or kidney disease, and people whose immune system is impaired.

Where is legionella found?

Legionella bacteria are common in natural water courses such as rivers and ponds. Since legionella are widespread in the environment, they may contaminate and grow in other water systems such as cooling towers and hot and cold water services. They survive low temperatures and thrive in temperatures between 20°C - 44°c if the conditions are right e.g. if a supply of nutrients is present such as rust, sludge, scale, algae and other bacteria. They are killed by high temperatures.

All information correct as HSE guide for Employers Legionnaire’s Disease.

L8 Risk Assessments

The risk assessment is your personal liability as the employer or person in control of the premises. You may be able to carry out the assessments yourself but, if not, you should call on help and advice from within your own organisation or if this is not available, from outside sources, e.g. consultancies or EHLUK You need to find out if your water systems (including the equipment associated with the system such as pumps, heat exchangers, showers etc.) are likely to create a risk.

Legionella Control

A suitable and sufficient risk assessment is required to identify and assess the risk of exposure to legionella bacteria from work activities and water systems on the premises and identify any necessary precautionary measure. If the assessment shows that there is a reasonably foreseeable risk and it is reasonably practicable to prevent exposure or control the risk from exposure, the owner/manager should put in place appropriate controls and monitor these controls for effectiveness. Person carrying out these assessments should be suitably able, experienced, instructed, trained and informed. Where the above expertise can not be found in house it may be necessary to enlist the help of an outside organisation.

Legionella Monitoring

A good legionella monitoring programme should include regular testing and inspection of water storage tanks and calorifiers, we use UKAS approved laboratories to carry out specialist analysis of water samples to monitor for both TVC and Legionella these are carried out in accordance with ISO11731:1998. We can carry out your monthly temperature checks, quarterly and annual checks as part of a site specific implementation plan which would be fully discussed with your own responsible person and tailored to suit your needs. If legionella or abnormal TVC readings are detected we have the expertise in place to immediately deal with the situation and bring the system back under control.

Regime Advice

Temperature control is a very effective way of controlling legionella, in hot & cold water systems legionella has been traditionally controlled by storing hot water above 60°C & cold water at below 20°C. This should be done regularly as part of an effective legionella control strategy & results recorded in a site log book as evidence that control is in place.

Should I take samples to test for legionella?

It depends: Sampling and testing for the presence of legionella bacteria is just one way of checking that the system is under control. But is not a simple test sampling and detecting legionella requires specialist help. Further details on how to sample and the frequency of sampling in both cooling towers and hot and cold water systems can be found in part 2 of the ACOP and guidance L8 document.

Calorifier De-scaling

Stored hot water should be kept at 60°C & distributed above 50°C to all outlets. Calorifiers should be regularly serviced & cleaned at least annually. Scale can be a major problem with stored hot water & calorifiers should be inspected annually and de-scaled if required.

Keeping Records

If you employee five or more people you must record the significant findings of your risk assessment. This means writing down the significant findings of the assessment and details of any monitoring or checking carried out.

If you have fewer than five employees you do not need to write anything down. Although it is useful to keep a written record of what you have done. You also need to keep records of your written scheme and who is responsible for managing the scheme. You should also keep the results of your routine monitoring.

You need to keep these records for a minimum of five years.

If you require any further information or would like to make an enquiry please contact us.

Legionella Risk Assessment

The Approved Code of Practice L8 2001 ‘The Control of Legionella Bacteria in Water Systems’ (ACoP L8) applies to all businesses in the UK who store or use water in a manner that is likely to create an aerosol, irrespective of the industry sector to which they belong.

Failure to comply with any provision of any Approved Code of Practice is not in itself an offence but any be used in criminal proceedings as evidence of failure to comply with appropriate regulations.

The requirements for a business under ACoP L8 are:

§  to identify and assess all sources of risk; ( carried out in strict compliance to BS 8580:2010—Water quality-Risk assessments for Legionella control-Code of Practise)

§  to prepare a written scheme;

§  to appoint a responsible person;

§  to implement and manage the scheme;

§  to keep records.

EHLUK Water Hygiene Service Division is specifically designed to help you meet all of these requirements. Our Risk Assessors are competent City & Guilds qualified engineers, with a detailed knowledge of Industrial, Commercial,Domestic water systems inc Cooling Towers. They have the knowledge and skills needed to identify the conditions that can lead to an outbreak of Legionella.

Legionnaire’s Disease is a highly emotive subject with all events receiving a great deal of media attention through Television, Radio, Newspaper and Internet coverage. The reputational issues surrounding an outbreak can add to the cost already present in the health – and even fatal – implications for those affected.

Call us today for a free no obligation over the phone quotation.

All we need is your company details,number and we do the rest.

Cooling System Risk Assessment

The first step in achieving satisfactory control of an open circuit cooling system is to undertake ‘a suitable and sufficient risk assessment’ of the open circuit system in place. This is ‘best practice’ as laid out by the Approved Code of Practice L8 ‘The control of Legionella Bacteria in Water Systems ’2001 (ACoPL8).
It is the measure by which enforcement agencies such as the Health and Safety Executive and the Environmental Health Officer will measure your site. The output from the risk assessment survey will be an easy-to-understand report. It details,

§  what, if any, physical aspects of the system require remedial actions;

§  the effectiveness of the precautions that are currently being applied;

§  advice about the pre-treatment equipment, and any dosing equipment present;

§  an independent assessment of the chemical regime in place, in relation to physical construction of the system itself;

§  thorough evaluation of all records and analyses and;

§  the composition of water in the system.

Once this first step has been completed, EHLUK Water Services Division will produce a ‘written scheme of precautions’, in the form of a ‘site-specific water management record book’, (log book); this is another requirement of ACoP L8.

The principle of carrying out a risk assessment first, derives from the Control of Substances Hazardous to Health Regulations (COSHH). Legionella is a pathogenic organism, and is therefore within the scope of the COSHH regulations.

By following the principles set out in COSHH, it will help prevent breaches of the 1974 Health and Safety at Work Act. This is the process we use to ensure our clients’ peace of mind. Contact us to now to arrange for an assessment of your site.

Water Tank Chlorination/Disinfection

Storage tanks can be a haven for all kinds of bacteria including legionella this can be for a varied amount of reasons.

  • Missing or incorrect lids. This can allow the tank to become contaminated with insects, birds or rodents.
  • Inadequate or missing insulation. This would make the temperature of the stored water difficult to control & would allow bacteria to multiply.
  • Tank configuration i.e. the inlet & the outlet should always be on the opposite sides of the tank ensuring that there is less chance of stagnation.
  • Misplaced or wrong overflows. Overflows should be screened so as to prevent birds, insects or rodents entering the tank.
  • Corrosion
  • Sediments or debris
  • Wrong size tanks
  • The condition of cold water storage tanks should be inspected at least every 12 months, then be changed and chlorinated if required.

EHL UK Accreditations

engineer was polite courteous and helpful as always Just what we have come to expect from you

Can't fault EHL everything was explained and all relevant documentation handed over to us excellent service ...

Our boiler is now up and running, the engineer was polite and courteous as always ...

Your engineers were great explained everything and was very confident with the full service provided ...

Your engineer was stupendously polite and courteous, and the heater is now singing. Many thanks.

Very pleased with service carried out by EHL ...

Everything got sorted and the guy sent was spot on ...

Happy New Year, as usual your engineers were excellent and delivered a good service

wouldn't use any other provider for our Facilities management

Job was carried out entirely to our satisfaction and some potential problems were pointed out to us, excellent service ...


Head Office

The Oaks Centre, Whinfield Drive
Durham Way South, Aycliffe Business Park


Contact Us

National Tel: 08719 769620
Local Tel: 01325 317777


Social Media

Follow EHL UK on Social Media