Nairobi, April 30 -- Foul, foamy water has been observed flowing into Nairobi National Park from the upper Mlolongo drainage corridor, prompting the Kenya Wildlife Service to raise the alarm over a suspected chemical discharge that threatens one of the country's most iconic protected areas.

The KWS said on Thursday it was "assessing a suspected chemical discharge incident reported on the morning of April 30 2026, in the Mlolongo Athi Dam ecosystem, raising serious environmental and public health concerns."

"Officers on patrol observed abnormal inflows entering the park, characterised by white, effervescent bubbles, continuous flow and unnatural colouration consistent with possible chemical contamination," the wildlife protection agency ...