Well Water Testing is the process of collecting water samples from a private well and submitting them to a certified laboratory to determine if the water is safe to drink. Because private wells are not regulated by local or state agencies, homeowners are responsible for monitoring their own water quality. Testing can identify bacteria, metals, minerals, and other substances that may be present in groundwater. Many of these contaminants have no taste, odor, or color, which means laboratory analysis is the only reliable way to know what is in your water.

To learn more about private well safety, visit the following:

Environmental Protection Agency

Arizona Department of Health Services

Why Is Testing Important?

Groundwater conditions vary widely across Arizona. In Southern Arizona, naturally occurring minerals and metals such as arsenic, fluoride, and uranium may be present in the aquifer. These levels can change based on geology, weather patterns, and environmental factors. Private wells can also be affected by bacteria or nitrate/nitrite due to flooding, runoff, or failing septic systems.

Because every well is different, periodic testing helps ensure a safe and reliable water supply. Water quality results may also play a role in real estate transactions, since some lenders require documentation of bacteria and chemical testing prior to loan approval. Buyers often request additional testing for peace of mind, especially when purchasing rural property.