By Ongaga Ongaga
The Kenya Wildlife Service (KWS) has raised alarm over suspected chemical contamination flowing into Nairobi National Park through the Mlolongo Athi Dam ecosystem.
KWS warned of serious environmental and public health risks.
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In a press statement released on Thursday, KWS said officers observed abnormal foamy water entering the park from the upper Mlolongo drainage corridor.
The water was reportedly characterized by white, effervescent bubbles, continuous flow, and unnatural coloration—signs that point to possible chemical contamination.
“KWS officers observed abnormal foamy water inflows entering the park from the upper Mlolongo drainage corridor, characterized by white, effervescent bubbles, continuous flow and unnatural coloration consistent with possible chemical contamination,” the agency said.
Preliminary findings indicate that the runoff may have originated from nearby industrial zones, including areas close to Orbit Chemical Industries Ltd, although investigations are still ongoing to establish the exact source.
The contaminated system feeds into the Mbagathi and Athi rivers, placing Athi Dam and surrounding ecosystems at significant risk.
“The affected system feeds into the Mbagathi and Athi Rivers, placing Athi Dam, a critical ecological and water resource, at significant risk, alongside aquatic biodiversity and downstream water users, including communities, agriculture, and livestock,” KWS noted.
In response, the wildlife agency has activated a multi-agency intervention involving water sampling and laboratory analysis, working jointly with the National Environment Management Authority (NEMA) and the Water Resources Authority (WRA).
The operation also includes tracing upstream discharge points and evaluating containment measures aimed at preventing further contamination.
“KWS has activated a multi-agency intervention involving water sampling and laboratory analysis, collaboration with NEMA and WRA, tracing of upstream discharge points and evaluation of containment measures to prevent further contamination,” the statement added.
The agency has advised the public to avoid contact with the affected water bodies, refrain from fishing or using water from impacted sections, and report any unusual water conditions or wildlife distress.
KWS also issued a stern warning to industries and facility operators within the catchment area, reminding them that discharging untreated waste or hazardous substances into protected ecosystems is illegal.
“The discharge of untreated waste or hazardous substances into protected ecosystems is illegal and will attract strict enforcement action, including prosecution, fines, closure of facilities, and liability for environmental restoration,” KWS warned.
Investigations are ongoing, and the agency says it will take decisive legal action against any party found responsible.
