Residents of Majengo Estate, Thika West sub-county say they risk contracting diseases following the disposal of sewer into open trenches.
The residents claim a recent clean up left the sewerage system worse than it was as the waste is now directed into open trenches meant for rain water.
Speaking to journalists on Monday, the area business community chairlady Janis Murugi claimed that the trenches have now been turned into dumping sites for hazardous liquid and solid waste, a situation that puts their health at risk.
He appealed to the county government to intervene and find a lasting solution to the myriad of environmental challenges facing the slum.
Janet Mumbi, the area sub-county administrator, acknowledged the existing environmental challenges stating that the county government is committed to addressing them by coming up with lasting solutions.
The administrator further appealed to residents to conserve the environment through proper waste disposal mechanisms. She added that garbage trucks adding that the county government vehicles go round the area each day collecting the wastes.
Many residents have resorted to constructing their own septic tanks which are periodically emptied by private service providers.