Total water discharge by quality and destination


Created with Highstock 5.0.9Agua vertida por receptor22%22%48%48%30%30%Agua vertida0%25%50%75%100%Agua vertidaLlevada a tratamiento externo: 22%Vertida a otras masas superficiales: 48%Vertida al mar/océano: 30%
Llevada a tratamiento externo
Vertida a otras masas superficiales
Vertida al mar/océano


Water discharged treatment

Fluid effluents from our facilities are subjected to purification treatments to minimize their environmental impact and ensure compliance with legal requirements. The type of wastewater treatment process is specific to the activity and the characteristics of the site. Treatment may be a physical-chemical (primary) process, completed with a biological (secondary) process, or even include more advanced treatment (tertiary process) or other specific processes for contaminants that are non-degradable using non-conventional processing techniques.

Some 36% of water discharged undergoes advanced treatment processes, 18% undergoes secondary processes and the remaining 46% undergoes primary processes as the quality of the discharged water does not require more complex treatment.

Main contaminants discharged

The main pollutants discharged at our facilities are: hydrocarbons, suspended solids, and organic matter likely to undergo oxidation, measured as Chemical Oxygen Demand (COD).


Created with Highstock 5.0.9ToneladasPrincipales contamientantes vertidos1991993843842452458,3188,31812,16612,1668,9648,9641,3851,3851,4361,4361,3911,39120142015201605,00010,00015,000
Sólidos en suspensión


Hydrocarbons discharged per activity in 2016
Activity Tons %
Refining 49 34%
Exploration and production 180 55%
Chemical 3 2%
Marketing 12 8%
Others 1 1%
Total 245 100%