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This research allowed us to know the physical-chemical and microbiological quality of rainwater collected in the Central Zone and Medrano neighborhood of the city of Quibdó - Chocó. This population has a high precipitation rate ranging from 1500mm/year to 8500mm/year, both currently and in the future, although this situation contrasts with the low coverage of drinking water, which is only 28.5%. To carry out this study, 5 sampling points were identified, and 4 samples were collected at each point with a periodicity of 1 weekly sample for 4 weeks, for a total of 20 representative samples. The selected coverings were zinc, asbestos cement, and mantle, and they are located in areas of high vehicular and pedestrian activity. The collected samples were analyzed in an accredited laboratory for this purpose. The parameters evaluated for the quality of rainwater were: apparent color, true color, conductivity, pH, total alkalinity, nitrites, nitrates, total coliforms, and Escherichia Coli. The result of the microbiological analyses was negative in 100% of the cases, while 15% of the physical analyses and 34% of the chemical analyses also yielded negative results. Due to the presence mainly of colony-forming units of Escherichia Coli and total coliforms, it was concluded that rainwater in the Central Zone and Medrano neighborhood of the city of Quibdó - Chocó, does not meet the established standards in the evaluated parameters required by the regulations, which means that it is not safe for human consumption due to the level of contamination it presents.

Yarly E. Mosquera-Torres, Universidad Tecnológica del Chocó, Quibdó, Colombia.

https://orcid.org/0009-0001-7983-7473

Eduar García Quejada, Universidad Tecnológica del Chocó, Quibdó, Colombia.

https://orcid.org/0009-0000-9786-0960

Deymer A. Mena Córdoba, Universidad Tecnológica del Chocó, Quibdó, Colombia.

https://orcid.org/0009-0004-7686-5331

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Received 2023-06-05
Accepted 2024-05-14
Published 2024-05-14