Well water quality testing — what must I check first?

Assessing pH Levels

When checking the pH level of your well water, it’s essential to understand that a pH range of 6.5 to 8.5 is generally considered safe for drinking. If the pH level is too low (acidic), it may indicate the presence of acidic substances like sulfuric acid, while a high pH level (basic) might suggest the presence of alkaline substances like calcium carbonate. A pH meter or pH test strips can be used for this assessment. For example, pH test strips typically range from 0 to 14, with 7 being neutral. Aim for a pH level between 6.5 and 8.5.

Determining Total Dissolved Solids (TDS)

After assessing the pH level, the next step is to measure the Total Dissolved Solids (TDS) in the well water. TDS refers to the total concentration of dissolved minerals, salts, and other inorganic substances in the water. You can use a TDS meter to measure the concentration of dissolved solids in parts per million (ppm). Aim for a TDS level below 500 ppm for optimal water quality. If the TDS level is excessively high, it may indicate the presence of high mineral content or contamination. A TDS level above 1000 ppm can indicate saltwater intrusion or other issues that need to be addressed.

Bacterial and Nitrates Testing

Finally, it’s crucial to test the well water for bacterial contamination and nitrates. Bacterial contamination can pose a significant health risk, while excessive nitrates can indicate the presence of agricultural runoff or sewage contamination. Use a water sampling kit to collect a water sample and send it to a certified laboratory for analysis. Typically, a well water sample should be tested for bacteria like E. coli, total coliform, and fecal coliform, as well as nitrates. If the results indicate bacterial contamination or high nitrate levels, you may need to install a water treatment system or take corrective action to prevent further contamination.