The study looked at how much lead, copper, manganese, and iron were in the water and sediment of Tagwai Lake in Nigeria. They found that the levels of these heavy metals were higher in the sediment than in the water. The average concentrations were highest for lead, followed by manganese, copper, and iron. The levels of lead, copper, and iron were within safe limits according to WHO standards, but manganese levels were too high. This suggests that the lake may be affected by human activities, and regular monitoring is needed to keep the lake safe for people who rely on it.