Creating economic, social and environmental value

Environmental management

Milestones 2016 

  • Development of corporate directives regarding biodiversity.
  • Extension of the ISO14001 certification to head office (Enagás, S.A. and Enagás GTS).
  • Implementation of a system for used oil generated at our infrastructures 
  • Analysis of the extension and the EMAS certification for the Serrablo and Yela storage facilities.

Lines of progress 2017

  • Adherence to the Biodiversity Pact.
  • EMAS verification of the Serrablo and Yela storage facilities. 
  • Creation of a general plan on noise reduction, customised for each facility.
  • Creation of a general plan to reduce the consumption of water, customised for each facility.
  • Creation and execution of a plan to disseminate information regarding the environment.
  • Creation, approval and publication of a Consumption Control Procedure for every infrastructure together with technical control instructions for each facility.
  • Dissemination and segregation campaign regarding residue at the company’s head office.
Environmental management
Enagás undertakes its environmental commitments (as outlined in the Health and Safety, Environment and Quality Policy) via its Environmental Management System. In 2016 the scope of the certification system according to ISO 14001 was extended to the head office, meaning that 100% of Enagás’ activity is ISO 14001 certified. Likewise, analysis for the EMAS certification of the Serrablo and Yela storage facilities has been presented, and they would join the regasification plants in Huelva and Barcelona that already have this certification.





See the Health and Safety, Environment and Quality Policy on the corporate website


Impact studies and assessment of environmental issues

Enagás studies the environmental impact of all its construction, operation and maintenance activities by means of environmental assessments. What is more, for infrastructure construction projects, and based on their type and on applicable regulations, environmental impact studies are carried out which include both the impacts themselves and the measures taken to mitigate them, while also establishing stakeholder consultation procedures.
Channels for dialogue with stakeholders

email contacto telefono enagás

email contacto pc Enagás

canales dialogo enagás

canales de dialogo proceso de consulta

Environmental monitoring is carried out through environmental audits of works, environmental surveillance, assessments of legal compliance in all installations and monitoring of environmental indicators and improvement plans. 

During the development of infrastructures, Enagás carries out activities aimed at protecting and preserving flora and fauna, thereby mitigating any impact on biodiversity. Such activities start with on-site reconnaissance before any work commences in order to check for the presence/absence of species along the route.

In addition, after the construction work, Enagás returns the affected areas to the way they were by reforesting the entire area.

In 2016, a number of construction projects were carried out using the corridors of other existing infrastructures and existing accesses to the work area were also used, thus reducing the damage to soil and waters. 

In addition, narrow work tracks were used for the Morelos gas pipeline construction project and 270,263 m2 were recovered by means of soil loosening, topsoil replacement and reconstruction of boundaries.

In addition, narrow work tracks and variable routes were used for the Euskadour Compression Station, thus reducing any effect on the vegetation and soil. 

Enagás is working on the conceptual study for interconnection of the South Transit East Pyrenees project as part of the Project of Common Interest on the “Interconnection point between Spain and France at Le Perthus, Eastern Spain-France Axis (now known as MidCat)”. This study is being carried out in order to find the best corridors, from an environmental standpoint, to develop during the subsequent phases of the project, as well as to indicate the location of the interconnection point on the border between France and Spain. This is done taking into account the environmental constraints and restrictions outlined in European, Spanish and French regulations as well as also the technical limitations of the construction of the gas pipeline.

At Enagás, we do not consume water in our production processes. The company has thus not stated significant risks linked to water shortages in the yearly assessments that are conducted in line with the company’s risk management model. In addition, environmental risk assessments are conducted at each of our infrastructures as water is considered to be one of the most important environmental aspects within the environmental management system (consumption and compliance with legal limits of water intake).

At Enagás the seawater intake is used for the floodwater or seawater vaporisers at the regasification plants. This water is returned under the same conditions as those in which it was withdrawn (the temperature decrease is minimal and does not affect the marine ecosystem) and is directly proportional to the quantity of regasified gas.

Seawater withdrawn and returned to its source (hm3)

Seawater withdrawn and returned to its source (hm3) 

Consumption of water by source (m3)Consumption of water by source 

The company’s consumption of water is due to uses such as sanitation, irrigation and fire-fighting equipment. The company therefore has various measures aimed at reducing water consumption such as better techniques for irrigation and sanitation.

In 2016 there was an increase in water consumption due to a leak in a pipe at the Barcelona regasification plant.

The wastewater discharged by Enagás is comparable to urban waste. In 2016, we discharged 9,131 m3 of water into the public mains and 9,106 m3 of water into septic tanks or the sea. 

With regards to spillage, the company carries out preventive measures such as dual-wall underground tanks, which are inspected regularly to ensure that they are watertight, and the placement of conta inment troughs and trays.

Accidental spillage in 2016 was:

50.3 litres of gasoil




Corrective actions include damage assessment, land decontamination and replenishment, removal and treatment by the waste manager and preparation of the incident report.

499.25 litres of oils

2 litres of battery electrolyte solution

15 litres of water with methanol

Enagás has implemented a system of segregation, management, storage and delivery to authorised managers of hazardous and non-hazardous waste.

Enagás mainly generates waste through facility and equipment maintenance. The company's objective is to recycle and recover this waste wherever possible.

Waste generated and managed (t)

Waste generated and managed

Noise at Enagás’ facilities is produced by the operation of regulators, turbines, vaporizers and pumps.

Every facility carries out an environmental noise measurement report around its perimeter, in line with the limits set out in municipal by-laws or legislation that is in force.

Enagás conducts annual noise measurement campaigns at its facilities in order to minimise noise pollution. In 2016, a total of 47 noise measurements were conducted at the regasification plants, 6 compression stations and at 38 sites. In addition, actions to minimise noise levels at regulation stations were conducted and silencers were installed at sites 15.02 Tortosa (Tarragona) and 15.06A Cabanes (Castellón). Different technical alternatives put forward by specialised companies have been studied for the regasification plant in Cartagena.

The main non-GHG emissions at our facilities are CO, SOx and NOx. There are also emissions of less significant gases. Emissions are produced in the process of natural gas combustion by different plant equipment.  

The energy efficiency measures and targets for reducing CO2 emissions (see the chapter on ‘Climate Change and Energy Efficiency’) are directly related to the reduction of these atmospheric emissions.

Enagás carries out regulatory and voluntary atmospheric checks (self-checks) at all its combustion sites. 

These control actions are as follows:

  • Legalisation of the point of emission and inclusion in the Logbook.
  • Initial regulatory inspection (conducted by an authorised inspection organisation (AIO)).
  • Annual TESTO check (carried out with their own resources (Analysing team and Enagás employees)).
  • Periodic regulatory inspections.

Both the regulatory inspections and the internal TESTO checks are planned annually for every facility as part of the Atmospheric Monitoring Programme. 

GHG emissions (t)

Emisión de gases de efecto invernadero enagas 

(*) This figure has been modified from that included in the 2015 Annual Report due to the detection of an error.