Community water suppliers release a Consumer Confidence Report every July. This report shows the levels of contaminants in the local water supply and how they compare with the Environmental Protection Agency's standards. Contact your community water supplier for a copy of the latest report. Building managers can also provide a copy to tenants. If your community water supplier provides water to 100,000 people or more, you can access the report online. The Environmental Protection Agency doesn't regulate private wells, so there are no Consumer Confidence Reports for these water supplies. However, if you're on well water you can contact the Centers for Disease Control and Prevention and request information about any testing and treatment of your water supply. You can also test your own water to determine if contaminants from your pipes are impacting your water. Shop for water testing kits at Instacart.