Lack of clarity in the results of pollution levels in Cerro Prieto

Almost two years after the Federal Government agreed to carry out studies on polluting emissions from the geothermal power plant in Mexicali, which was done by educational institutions in Mexico and the United States at a high cost, no formal information is given to the public yet.

Mexicali, Baja California on January 12, 2018. – Representative of the Baja California Party (PBC) Jorge Eugenio Núñez described the process as “opaque and irresponsible”. The results were delivered on January 11, regarding the contamination levels generated by the Geothermal plant. Cerro Prieto, and according to the specialists, the figures are within the allowed spectrum.


“It seems irresponsible that no results are given to the people of the Mexicali Valley in such a sensitive issue. Absolutely no report, methodology or technical data is provided, not even to the media, “said the President of the Commission for Economic Development and Trade Binational.

Diputado Jorge Eugenio Núñez del Partido de Baja California (PBC)

Núñez Lozano explained: “The investigation was demanded by citizens, and therefore, a Special Commission of the Federal Electricity Commission (CFE) carried out the study, without allowing the intervention of any other authority in the process of the investigation that was supposedly elaborated by researchers from the National Autonomous University of Mexico (UNAM) and the University of Berkeley, California, United States”.

The results state that air pollution in the area is “within the tolerance ranges”, the levels of metals in the blood of the inhabitants are “within the margins”, and the water quality is “within the permissible levels”, but no details on the indexes of contamination established by international treaties or organisms are provided; so people don’t know if the situation is permissible for the environment and the human being.

The meeting was attended by Engineers, representatives and experts from  UNAM and the University of Berkeley.


· In May 1973, the Cerro Prieto Geothermal field began activities with the entry into commercial operation of the first two units of the Cerro Prieto I Power Plant. (II-2)

· The Cerro Prieto V Geothermal Electric Field is the last one in the area put into service in 2012, which would cost more than 137 million dollars. (II-17), and it was projected that the investment would be recovered in 4 years. (II-18)

· The budget determined for environmental protection measures of Cerro Prieto V would be less than 6 million pesos per year, and no neighboring zones are specified (II-20).


Source of reference hard data: Environmental Impact Manifesto, Cerro Prieto Geothermal Electric Field:




· The Cerro Prieto Geothermal Field is the largest of the four Mexican fields that exist in commercial exploitation, and the second largest geothermal facility in the world


Source: Electronic Journal El Periódico de la Energía

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