Cloudy, murky or grayish water is usually caused by dissolved or suspended solids. This is also known as “turbidity.” Water can become turbid naturally or from land disturbances such as construction, storms and urban runoff. Suspended particles such as dirt, rust, silt, plankton, and fine sediments can damage faucets, valves, and water using-appliances as well as reduce water pressure. These solids provide a breeding surface for bacteria to colonize and multiply in domestic water systems. Diagnosing the right solution for this issue is challenging because turbidity can show up for so many different reasons. Generally a combination of the solutions below is needed to treat the problem.