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The first clean-up works for a section of the Atoyac river, which runs through the central Mexican state of Puebla, could be launched next year.
Atoyac is reportedly the third most polluted river in Mexico. It is estimated that 80% of Puebla's wastewater is discharged into the Atoyac, 15% of which is industrial waste.
Federal and state authorities are currently evaluating 13 works that could be implemented to kick off the project, local news portal Contraparte reported.
The works will be carried out with 300mn pesos (US$15.9mn) in funding that the federal government has earmarked for next year.
The initiatives form part of a larger portfolio of works for the river, Alfredo Ávila, director of the state's water and sanitation commission (Ceaspue), told the news outlet.
Initiatives being reviewed include the installation of water collectors and wastewater treatment plants along the Atoyac's trajectory.
In April, the state government announced that it will issue a green bond to fund the cleanup works, which according to estimates requires investments of 6-8bn pesos. The transaction will reportedly be supported by the Inter-American Development Bank (IDB) and expected to take place within 20 months.
The river is located in the Mexican states of Tlaxcala and Puebla, running through 22 municipalities of the latter.