In which decade did lead usage peak in the United States?

Lead usage in the United States peaked during the 1940s. This was a time when lead was widely used in various applications, including gasoline, paints, and plumbing materials. The increased industrial output during World War II and the post-war economic expansion contributed to higher demand for lead products.

During the 1940s, leaded gasoline became prevalent, which significantly increased overall lead consumption due to the automotive industry's growth. It wasn't until later decades that the harmful effects of lead exposure began to be recognized, leading to a gradual decline in its usage after regulations were put in place. By understanding the context of lead's peak in usage during this era, one can appreciate the historical significance of lead regulations and public health initiatives that followed in subsequent decades.