Safe, clean, accessible, and affordable drinking water is a human right in California. The primary source of drinking water in the Coachella Valley is groundwater, which is drawn from underground aquifers through wells. Groundwater can contain contaminants, some natural and some from human activities like agriculture. Common drinking water contaminants in Coachella Valley include arsenic, fluoride, uranium, chromium, nitrate, and perchlorate. When people consume water with high levels of these contaminants, a person may develop serious health problems. Children, pregnant people, and the elderly are the most vulnerable to these contaminants. Here, we provide information on where drinking water comes from, the health effects of common drinking water contaminants found in Coachella Valley, how to test tap water, and helpful community resources to learn how to treat your water or find help from local organizations.