Researchers are currently examining the cenotes, or natural sinkholes, found within the urban areas of Cancun. A significant problem they are encountering is the frequent use of these cenotes as dumping grounds for waste. Despite ongoing clean-up campaigns that improve the visual appearance of the cenotes, there is a need to address a less visible form of pollution – microbial contamination, according to Job Ali Díaz Hernández, the head of research and technological development at the Polytechnic University of Quintana Roo (Upqroo).

Regrettably, all tested cenotes have shown evidence of bacterial contamination. The levels of contamination vary, with some cenotes showing minimal levels while others are extremely contaminated. The most affected are those that are interconnected, Díaz Hernández explained.

The Department of Ecology and Environment of the Benito Juárez City Council reports that there are approximately 109 urban cenotes within the municipality, with the majority located in the city's northern polygon.

Díaz Hernández further explained that during their investigations of these water bodies, they discovered that people, particularly those living in irregular colonies, are using the cenote water for daily activities. This could potentially lead to a serious public health crisis.

The goal of their study is not only to promote greater ecological awareness but also to propose potential solutions to prevent further contamination of these water bodies and possibly the aquifer. Díaz Hernández revealed that they are already developing a systematic method to purify the cenote water.