Arsenic toxicity occurs when a person is exposed to high levels of arsenic, a naturally occurring element found in soil and water. It can enter the body through contaminated drinking water, food, or inhalation of dust. Symptoms of arsenic poisoning include nausea, vomiting, abdominal pain, and diarrhea. Long-term exposure can lead to serious health issues, including skin lesions, cancer, and damage to the nervous system. The effects of arsenic toxicity can vary based on the level and duration of exposure. Environmental sources of arsenic include certain pesticides, industrial processes, and mining activities. Public health measures aim to reduce arsenic levels in drinking water to protect communities from its harmful effects.