“Testing” can start with your senses: Assessing your water’s appearance, taste, and smell can all be good first steps. The best way to know for sure what’s going on with your water is to use a well water testing kit, which can tell you about the specific levels of bacteria, dissolved solids, and hardness of your water with precision. Have a pro test your well water at least once per year.

DIY kits are available for basic air quality testing, but professional services provide more comprehensive results and recommendations. While a DIY kit may seem cost-effective, a professional assessment is more thorough. Inspectors are better equipped to catch all pollutants and hazards, and you'll still need a professional to verify and act on DIY test results. Furthermore, some kits don't test for certain pollutants or only detect their presence without measuring specific levels (like mold spores). It's generally better to opt for a detailed professional assessment.

Lead exposure poses serious health risks, particularly for children, and can be present in paint, pipes, and soil.

How you test for lead in your water depends on the source of your home's water supply. If you have municipal water, your local water system may offer to test the water for free or may connect you to a lab that will perform the testing.

If you have a private well that provides drinking water, you are responsible for testing it for lead. Look for a lab that is accredited by your state's Department of Environmental Protection to perform the test.