Do you want to contribute to the health of its staff and the public in general and ensure compliance with the existing legislation?

The Royal Decree 865/2003 establishes the hygiene measures necessary for the prevention and control of legionella.

Gesplasur can evaluate its facilities of risk, potential stations of aerosols, and designing appropriate maintenance programmes to prevent the possible development of this dangerous bacteria.

Our technicians are highly qualified and all our services staff has attended the mandatory courses homologated (according to order SCO/317/2003), and has great expertise to carry out all the treatments and analytical controls necessary for any type of facilities


Introduction to legionella

It is a bacterium in the form of Bacillus of 0.5 to 0.7 microns wide and 2 to 20 microns in length. It belongs to the Group of gram-negative bacteria and this equipped with flagella that facilitate their mobility. It does not present forms of resistance (spores).

It belongs to the family Legionellaceae, which are known around 30 species and more than 50 serogroups. Legionella pneumophila is responsible for more than 90% of infections; It consists of 15 serogroups serogroup 1 is the most frequent.


The Legionella bacterium was discovered in 1976 as the agent responsible for producing a lung disease severe human. It was identified as the causative germ of a respiratory disease outbreak recorded in 1976 that hit 182 people attending a Convention of the American Legion in a Philadelphia hotel. It was named Legionella pneumophila and disease that causes, "legionnaire's disease".

Legionnaire's disease is typically found naturally associated with aquatic environments (rivers, lakes, etc.). These natural environments can pass to water distribution systems, reaching colonize buildings distribution networks.

This bacterium which has colonized our facilities can penetrate into our respiratory system via aerosols, producing very serious illnesses in certain conditions.

The bacteria requires a series of environmental conditions that favour their proliferation and their development, as well as the existence of generators of aerosol devices, so that it can penetrate into the respiratory system of the man.

Nowadays the infection should be considered perfectly controllable always take appropriate measures, such as the establishment of a therapy in patients and the control of the buildings.

Where do you live?

The natural habitat of Legionella is water, so that we can find in nature in rivers, lakes, ponds and fountains; associated particularly with the existence of sludge and organic matter, which act as a source of nutrients.


From its natural reservoir pass bacteria to colonize the supply systems of cities and, through the distribution network, joined household water facilities or other facilities that require the use of water to operate (systems of refrigeration, irrigation, swimming pools, tunnels, washing, etc.).

Frequently, these facilities have elements, known with the name of amplifiers, in which occurs the water stagnation and accumulation of products that serve as substrate for the bacteria (sludge, organic matter, material corrosion, amoebae, other bacteria, etc.) enabling its multiplication to infective concentrations for the man.

What you need to survive?

  • Accumulation of water: To be an aquatic bacteria may be present in any natural or artificial water medium.
  • Temperature: It is able to survive in a wide range of temperatures ranging between 20 and 60 ° C, although its multiplication and growth occurs at temperatures from 20 to 45 ° C, its optimum between 35-37 ° C.

-By below 20 ° C: remains sleeper
-Between 35-37 ° C: optimum development
-Per above 60 ° C: die 90% in 2 hours
-Per above 70 ° C: die 100% quickly


  • Nutrients: The water stagnation and accumulation of nutrients (organic matter, sludge, matter of corrosion, fouling, and protozoa) make up the optimum conditions for their propagation.



Legionella causes legionellosis, that can present two forms of disease:

  • Pneumonia or "legionnaire's disease", serious and even fatal in nature. It has an incubation period of 2 to 10 days.
  • "Pontiac fever", mild and flu-like symptoms.

Risk of individual factors for developing the disease are:

  • Advanced age, 80% of those outbreaks has over 60 years.
  • Male sex, the reason of masculinity among the cases is 4/1.
  • Chronic respiratory conditions.
  • Smoking, alcoholism.
  • Immunosuppression, cancer, diabetes, corticotherapy.

How is it transmitted?

Legionellosis is contracted through the respiratory tract by inhalation of aerosols or aspiration of water containing the bacteria legionella in high quantities.

Aerosols are formed from droplets which may arise to spray water or breathe air bubbles through it. Much smaller than the drops, the more dangerous they are. Droplets whose diameter is less than 5 µ arrive more easily at lower respiratory tract.

The risk of contracting the disease will depend on the concentration, type and virulence of the bacteria in aerosol and the exposure time.

Transmission from person to person and not from ingestion has not been declared.

Associated facilities

Installations that can be a source of pollution are those which, after being colonized by legionella, favour the proliferation of bacteria and produce aerosols.

The following are potential hotbeds of legionellosis:

  • Hot and cold water systems
  • Cooling towers and evaporative condensers
  • Whirlpools and springs
  • Fountains and sprinklers
  • Environmental humidifiers
  • Car washing tunnels
  • Respiratory and other therapeutic material
  • And in general all installation that uses water and produce aerosols...

Prevention of legionellosis

To prevent legionellosis we must act on the 3 stages that relate to the following:

  • The route of entry, controlling the quality of water supply to the installation. It must be a quality water controlled, with a concentration of residual chlorine which guarantees its microbiological quality.
  • Prevent their multiplication in the interior of the same, preventing and controlling the conditions that favor its multiplication, such as temperature and presence of nutrients (cleaning and disinfection).
  • Avoid or reduce your spray, controlling the generation and the dumping of aerosols (location of cooling towers, increase of the aerosol droplet size...)

The Royal Decree 865/2003was enacted to regulate the above-mentioned preventive actions, 4th of July, by establishing the hygiene criteria for the prevention and control of legionellosis.


Regulations on Legionella

Royal Decree 865/2003

Royal Decree 865/2003 , 4th of July, whereby the hygiene criteria for the prevention and control of legionellosis. It is the law of obligatory, existing and implementation throughout the Spanish territory. Some autonomous communities have specific legislation thereon, which shall be taken in the geographical area of the corresponding community.

See the Royal Decree 865/2003

Norm UNE 100030-2005

Guide for the prevention and control of proliferation and spread of legionella in facilities. It is a guide which should take into account when it comes to the design of facilities and their maintenance, as outlined in article 6 of the RD 865/2003.

The Ministry of health and consumer guides

Compilation of specific guides, sorted by chapters that relates in detail the characteristics of design, comprehensive maintenance and assessment of risk of legionellosis in each type of installation. It is not mandatory, but it has become an excellent reference guide for the elaboration of preventive maintenance programs.

See the Guides of the Ministry of health and consumption


The Royal Decree 865/2003 applies to installations which use water in their functioning, produce aerosols and are located in the interior or exterior of buildings of collective use, industrial facilities or means of transport may be susceptible to become foci for the spread of the disease during its operation, testing, maintenance or service.

Article 2. Classification of the facilities at risk:

  1. Facilities with greater proliferation probability and dispersion of Legionella:
  • Cooling towers and evaporative condensers
  • Systems of water hot health (ACS) with accumulator and return circuit
  • Water systems heated with constant agitation and recirculation through air injection
  • Industrial humidificadoras Central

2 Facilities with smaller proliferation probability and dispersion of Legionella:

  • Installation systems inside of human consumption (AFCH) cold water and hot water without return circuit
  • Cooling equipment evaporative that pulverize water, not included in 1st paragraph
  • Humidifiers
  • Ornamental fountains
  • Systems of irrigation by aspersion in the urban environment
  • Fire water systems
  • Elements of cooling spray outdoors
  • Other apparatus that accumulate water and can produce aerosols, for example: wash tunnels

3. Risk in respiratory therapy facilities.

Article 8. Maintenance on-site programs. Laying down hygiene maintenance programmes suited to the characteristics of each installation, and shall include at least the following:

1. For installations of greater proliferation probability and dispersion:

  • Elaboration of a signposted plane of each installation, which will be collected points or critical areas of the facility.
  • Review and examination of all parts of the installation that ensures its correct operation.
  • Program of water treatment that ensures its quality.
  • Programme of cleaning and disinfection of the entire installation.
  • Existence of a record of maintenance of each installation.

2. For installations smaller proliferation probability and dispersion:

  • Hydraulic operating scheme.
  • Review of all parts of the installation to ensure proper operation.
  • Implementation of maintenance programmes which shall include as a minimum the cleaning once a year, and if applicable the disinfection of the installation.
  • Their tasks shall be shown in the maintenance log.

Specific conditions for maintenance of systems for hot and cold water for human consumption are set out in annex 3, the cooling towers and evaporative condensers are reflected in annex 4, and guidelines for the maintenance of bathtubs and hydromassage pools of collective use are contained in annex 5.

Other facilities are not developed in the RD 865/2003, so operations will be based on the assumptions related to similar systems and in the guides of the Ministry of health and consumption patterns.

Article 4. Responsibility of the operators of the installations. It establishes that holders of the installations described in article 2 shall be responsible for the compliance with provisions of this Royal Decree and that periodic maintenance programs, carried out improvements in structural and functional facilities, as well as control of the microbiological and physico-chemical quality of the water, so they do not pose a risk to public health. The hiring of an outside maintenance service does not exempt the holder of the installation of its responsibility.


Article 13. This article passes all the staff who work on hygiene maintenance, belong to an entity or contracted external service or either own installation staff, must be completed the courses which it approves for this purpose the Ministry of health and Consumer Affairs at the proposal of the corresponding autonomous communities, in accordance with the order SCO/317/2003, of 7 February, by which regulates the procedure for the approval of training courses of personnel which performs the operations of sanitary maintenance of installations subject to the Royal Decree.

In addition, all biocidal products that are used to perform treatments must be registered. For indoor domestic hot and cold drinking water installations, chemicals used for treatment of the facilities must comply with to do so in Royal Decree 140/2003 of 7 February, whereby health criteria of the quality of water for human consumption.

Shall comply also with the norm UNE-EN corresponding, as required by the order SAS/1915/2009, of 8 July, on substances for the treatment of water intended for the abstraction of water for human consumption, which regulates the Royal Decree 140/2003.


Control of Legionella

From its environmental health department, formed by professionals with high experience and training and puts at your disposal all the technical and human resources which guarantee the best results in the prevention and Control of legionellosis in all kinds of systems and facilities:

  • Drinking cold water and hot water systems.
  • Cooling towers and evaporative condensers.
  • Humidifiers and evaporative coolers.
  • Swimming pools and whirlpools of collective use.
  • Fire water systems.
  • Ornamental fountains.
  • Of irrigation systems.
  • Tunnels and bridges of washing.
  • All kinds of systems that use water and generate aerosols in your process.

Lead our Department people with great knowledge of the prevention of legionellosis. This experience accumulated over years of fieldwork, as well as the knowledge acquired in attendance at conferences and participation in health forums and maintenance sector, enables us as the company's selection to meet your needs in any of the following areas of action:


  • Health centres (hospitals, clinics, health centres...)
  • Residential socio-medical centres
  • Hotels and catering in general establishments
  • Sports centres
  • Industry
  • Public buildings
  • Neighboring communities...

Legionella control: our treatment

  • We carry out a personalised study of your facilities at risk based on the guidelines of the RD 865/2003. For this purpose we apply guides risk assessment for each type of installation, carried out in the guides of the Ministry of health and consumption.
  • We prepare a maintenance schedule or self-control specific for each type of installation and detected risk. We relate them detected deviations and propose corrective actions to be taken in each case.
  • We carry out cleaning and disinfection of maintenance and/or shock treatments. All our services staff has attended the requisite courses homologated (according to order SCO/317/2003).
  • We manage collection of samples and their analysis in approved laboratories. We have a network of collaborating laboratories that serve us throughout the Spanish geography.
  • We install and maintain biocide dosing equipment and provide contacts for the acquisition of maintenance products already are solids or liquids (corrosion-incrustacion inhibitors), automatic purge equipment, regulators of chlorine and pH, etc...
  • We give training to the maintenance staff of the contracted facilities, in order that properly carried out peacekeeping operations and register them under the corresponding paragraphs of the registration book.
  • We prepare a Registration book of keeping personalized for their facilities at risk.

Record book: Documentation included

  • Custom preventative maintenance program.
  • ROESBA of the company authorized by the counseling gives environmental health of the Junta de Andalucía.
  • Certificates of training the technicians involved in the treatments in prevention and control of legionella.
  • MSDS of the products for treatments and health records.      
  • Certificates of cleaning and disinfection of each system treatments to treat.
  • Analytical results from samples of aguadé each treated device.
  • Models of records of the operations of maintenance to be completed by own personnel and/or GESPLASUR
Atencion al cliente Teléfono


 952 436 567

 605 071 103


Lunes a viernes

09:00 a 20:00




To contact an English speaking technician please phone Michelle Zutter at 669933896