Lead, a neurotoxic metal, is known for its detrimental effects on human health, particularly during early development. It can be found in water supplies due to aging infrastructure, leading to various developmental and neurological issues. Studies have shown that exposure to lead, even at low levels, can negatively impact cognitive function, behavior, and overall neurological development in children. This is because lead can disrupt critical processes in the developing brain, such as synaptic transmission, neuronal growth, and neurotransmitter regulation. Some research has suggested a possible link between lead exposure and an increased risk of developing ASD, although more studies are needed to establish a causal relationship and determine the exact mechanisms through which lead might contribute to the disorder.