Quick Answer
To interpret water testing results effectively, understand the lab values and compare them to local and national standards for safe drinking water. Identify any contaminants and their corresponding levels, and consider the potential health risks associated with each. Consider consulting a water treatment expert if unsure.
Understanding Lab Values
When using a home water testing kit, you’ll typically receive lab results that include pH levels, total dissolved solids (TDS), and various contaminant readings such as lead, arsenic, and bacteria. Familiarize yourself with the lab’s reporting units, as these can vary between milligrams per liter (mg/L) and parts per million (ppm). For example, a typical pH range for drinking water is between 6.5 and 8.5, while a TDS level above 500 mg/L may indicate hard water.
Identifying Contaminants and Their Levels
Compare the contaminant levels in your water to the Environmental Protection Agency’s (EPA) maximum allowable limits for safe drinking water. For instance, the EPA sets a maximum allowable limit of 15 mg/L for lead in drinking water. If your test results show a lead level above 10 mg/L, consider taking corrective action such as installing a lead filter or replacing your plumbing. If your test results show a high level of bacteria, consider disinfecting your water source or treating it with a disinfectant.
Taking Action Based on Results
If your water testing results indicate a contaminant level above safe limits, consider consulting a water treatment expert to determine the best course of action. They can help you identify the source of the contamination and recommend a treatment solution that meets your needs and budget. In some cases, you may need to replace your water source, such as a well or municipal water supply, or install additional treatment systems like a water softener or reverse osmosis system.
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