 This study examined the composition of bacteria in crude oil contaminated soil from Tabasco and Tomolipus States, Mexico. It found that proteobacteria was the most prevalent phylum in both regions, followed by firmicutes and actinobacteria. Additionally, the study identified several genera in alkaline soil from Tomolipus, including scurminel sp, azospiral MSP, and unclassified species from the rotospiralaceae family, which were more abundant than those in acidic soil from Tabasco. The study also found thalasosporae, unclassified members of the sphingominidaceae family and unclassified members of the alphaproteobacteria class in higher abundance in the acidic soil. Overall, the study suggests that the bacteria identified in these genera may have the potential to degrade petroleum. Further research should be conducted to explore how they contribute to petroleum degradation. This article was authored by Raul Garcia Garcia, Virgilio Boca Negra Garcia, Lord Vitalopez, and others.