The Ogun government has asked residents in areas affected by flooding to be careful about their sources of drinking water.
The areas affected include border towns of Isheri, Warewa, Magboro, and Arepo.
It was gathered Nigeria is experiencing its worst flooding in a decade with Benue, Delta, Bayelsa, Rivers, Kano, Edo, and Ogun as the worst-hit.
In a statement on Friday, Ola Oresanya, the state’s commissioner for environment, said avoiding drinking well and borehole water in flooded areas would help residents avert cholera and other waterborne diseases.
While inspecting the flooded areas, the commissioner said the appeal became necessary as flooding has contaminated the water sources.
Some of the contaminants were listed as fuel, pesticides, metals as well as pathogens from sewage, cemeteries, septic tanks and dead animals.
He said the state will embark on another round of dredging and clearing of drainage channels and waterways of silts in the affected areas.