Over recent years a number of ‘high risk, other risk systems’ have come to light and triggered the release of additional technical guidance or guidance notes from either the HSE or industry professionals such as the Water Management Society.

1. Legionella in ‘Other Risk
Systems’
- By Nemco Utilities
(www.nemco-utilities.co.uk)

2. Legionella in ‘Other Risk
Systems’
ACOP L8 states that a Legionella Risk Assessment should
be ‘suitable and sufficient’ which in general terms is taken
to mean that anywhere on a premises that uses or stores
water should be included in the risk assessment. Aside from
the usual domestic water services and evaporative cooling
systems a brief mention is made in the guidance about
‘other risk systems’.
For more information about unusual water systems or about Legionella Management in general,
please visit our website www.nemco-utilities.co.uk or call on 01284 724 503.

3. Legionella in ‘Other Risk
Systems’
‘Other Risk Systems’ can be classified as anything that
meets chain of events allowing proliferation and
dissemination of Legionella bacteria and could include;
• Water features / irrigation systems
• Humidifiers
• Emergency showers
• Machine tool coolant systems
For more information about unusual water systems or about Legionella Management in general,
please visit our website www.nemco-utilities.co.uk or call on 01284 724 503.

4. Legionella in ‘Other Risk
Systems’
Over recent years a number of ‘high risk, other risk
systems’ have come to light and triggered the release of
additional technical guidance or guidance notes from either
the HSE or industry professionals such as the Water
Management Society.
A good example of this is aqueous tunnel washers, often
found in white goods and vehicle manufacturing facilities,
used to de grease and pre treat components prior to them
being painted.
For more information about unusual water systems or about Legionella Management in general,
please visit our website www.nemco-utilities.co.uk or call on 01284 724 503.

5. Legionella in ‘Other Risk
Systems’
Up until an outbreak at the JCB
factory in 2008, this was a
previously unknown source of
bacteria and sparked a raft of
additional recommendations for
routine sampling and water
treatment. Similarly, a number of
instances prompted some additional
guidance to be circulated regarding
the operation of vehicle / car washes.
For more information about unusual water systems or about Legionella Management in general,
please visit our website www.nemco-utilities.co.uk or call on 01284 724 503.

6. Legionella in ‘Other Risk
Systems’
If you already have a comprehensive risk assessment in place,
any such systems will have been highlighted a regime suggested.
If in any doubt, ask yourself are there any water processes
(domestic or industrial) where the following conditions may be
present;
• Water temperature in the range 20oC to 45oC
• The presence of nutrients such as sludge, scale and rust
• Water stagnation
• Potential for creation of an aerosol
For more information about unusual water systems or about Legionella Management in general,
please visit our website www.nemco-utilities.co.uk or call on 01284 724 503.

7. Legionella in ‘Other Risk
Systems’
If so, these should form an integral part of the assessment
and ongoing management programme. However, whilst it is
relatively simple to identify these processes, the amount of
information available to determine what precautions are
necessary is very limited.
For more information about unusual water systems or about Legionella Management in general,
please visit our website www.nemco-utilities.co.uk or call on 01284 724 503.

8. Nemco Utilities Ltd.
ADDRESS EMAIL
Nemco Utilities Ltd • info@nemco-
12 Kempson Way utilities.co.uk
Hillside Business Park
Bury St Edmunds • sales@nemco-
utilities.co.uk
Suffolk
IP32 7EA
• accounts@nemco-
utilities.co.uk
Telephone: 01284 724503
Website: http://www.nemco-
Fax No.: 01284 724826 utilities.co.uk/
For more information about unusual water systems or about Legionella Management in general,
please visit our website www.nemco-utilities.co.uk or call on 01284 724 503.